Microwaves were invented during World War II for radar technology. Microwave ovens have become ubiquitous in the last 40 years for quickly thawing and cooking food. Microwaves work by interacting with polar molecules like water in food, causing them to rotate and create friction and heat.
The document appears to contain multiple choice questions from natural science and social science subjects. It includes questions about density calculations, chemical and physical changes, human anatomy, astronomy, the scientific method, and Philippine history. The questions cover a wide range of science and social studies topics at varying levels of difficulty.
SHS MOCK EXAM GEN PHYS.pptxxxxxxxxxxxxxxAliceRivera13
The document contains 16 multiple choice questions related to physics concepts such as forces, motion, gravity, light, mirrors, and special relativity. The questions cover topics like Newton's laws of motion, weight changes in elevators, net forces, light reflection, the velocity addition formula in relativity, and how microwaves heat food.
The document provides an overview of various science topics including:
1. Tools used to study butterfly wing damage including microscopes and hand lenses.
2. Cells, photosynthesis, diffusion, and the roles of cell walls and membranes.
3. Body systems like skeletal, muscular, nervous systems and their interactions.
4. Genetics, meiosis, mitosis, DNA and sexual vs. asexual reproduction in organisms.
The document contains 15 multiple choice questions about various science topics such as cells, motion, forces, chemistry, and physics. The questions test concepts like the parts of a cell, what defines motion, factors that affect plants, properties of matter, and experimental design. Overall, the questions assess a wide range of foundational science knowledge.
The document provides vocabulary and grammar lessons for learning English for science. It includes definitions and examples of important science words, word building exercises combining prefixes and suffixes with root words, questions and answers about scientific topics, examples of sentences using passive voice and past perfect tense, and shortening long sentences.
The document is about the origins of life on Earth. It discusses several scientific theories for how life began, such as the primordial soup theory, hydrothermal vents theory, and the endosymbiotic theory of how eukaryotic cells formed. It describes evidence that supports these theories, like the Miller-Urey experiment demonstrating formation of organic molecules from early Earth conditions, and mitochondrial and chloroplast DNA resembling bacteria. The essential question asks if life could arise from nonlife today based on scientists explaining life arose from nonlife billions of years ago through abiogenesis.
This document contains a science quiz with multiple choice questions ranging from easy to difficult. The quiz covers topics in biology, chemistry, physics and earth science such as the process of burning wood, types of infections, characteristics of insects, names of inner planets, identifying animal teeth structures, how the uterus accommodates a baby, advantages of fluorescent lamps over incandescent, identifying components of urine, testing for the presence of starch, and female menstruation.
This document contains a science quiz with multiple choice questions ranging from easy to difficult. The quiz covers topics in biology, chemistry, physics and earth science such as the process of burning wood, types of infections, characteristics of insects, names of inner planets, identifying animal teeth structures, how the uterus accommodates a baby, advantages of fluorescent lamps over incandescent, identifying components of urine, testing for the presence of starch, and female menstruation.
The document appears to contain multiple choice questions from natural science and social science subjects. It includes questions about density calculations, chemical and physical changes, human anatomy, astronomy, the scientific method, and Philippine history. The questions cover a wide range of science and social studies topics at varying levels of difficulty.
SHS MOCK EXAM GEN PHYS.pptxxxxxxxxxxxxxxAliceRivera13
The document contains 16 multiple choice questions related to physics concepts such as forces, motion, gravity, light, mirrors, and special relativity. The questions cover topics like Newton's laws of motion, weight changes in elevators, net forces, light reflection, the velocity addition formula in relativity, and how microwaves heat food.
The document provides an overview of various science topics including:
1. Tools used to study butterfly wing damage including microscopes and hand lenses.
2. Cells, photosynthesis, diffusion, and the roles of cell walls and membranes.
3. Body systems like skeletal, muscular, nervous systems and their interactions.
4. Genetics, meiosis, mitosis, DNA and sexual vs. asexual reproduction in organisms.
The document contains 15 multiple choice questions about various science topics such as cells, motion, forces, chemistry, and physics. The questions test concepts like the parts of a cell, what defines motion, factors that affect plants, properties of matter, and experimental design. Overall, the questions assess a wide range of foundational science knowledge.
The document provides vocabulary and grammar lessons for learning English for science. It includes definitions and examples of important science words, word building exercises combining prefixes and suffixes with root words, questions and answers about scientific topics, examples of sentences using passive voice and past perfect tense, and shortening long sentences.
The document is about the origins of life on Earth. It discusses several scientific theories for how life began, such as the primordial soup theory, hydrothermal vents theory, and the endosymbiotic theory of how eukaryotic cells formed. It describes evidence that supports these theories, like the Miller-Urey experiment demonstrating formation of organic molecules from early Earth conditions, and mitochondrial and chloroplast DNA resembling bacteria. The essential question asks if life could arise from nonlife today based on scientists explaining life arose from nonlife billions of years ago through abiogenesis.
This document contains a science quiz with multiple choice questions ranging from easy to difficult. The quiz covers topics in biology, chemistry, physics and earth science such as the process of burning wood, types of infections, characteristics of insects, names of inner planets, identifying animal teeth structures, how the uterus accommodates a baby, advantages of fluorescent lamps over incandescent, identifying components of urine, testing for the presence of starch, and female menstruation.
This document contains a science quiz with multiple choice questions ranging from easy to difficult. The quiz covers topics in biology, chemistry, physics and earth science such as the process of burning wood, types of infections, characteristics of insects, names of inner planets, identifying animal teeth structures, how the uterus accommodates a baby, advantages of fluorescent lamps over incandescent, identifying components of urine, testing for the presence of starch, and female menstruation.
This document outlines the intended learning outcomes for science in grades 7-8 in Utah. It discusses six main categories of skills and understanding that students should develop: 1) using science process and thinking skills, 2) demonstrating understanding of science concepts and principles, 3) communicating effectively using science language and reasoning, 4) demonstrating awareness of social and historical aspects of science, 5) demonstrating understanding of the nature of science, and 6) using these skills to answer multiple choice questions about science examples and experiments.
This document provides an overview of chemistry and its importance. It discusses:
1) How chemistry began with early Greek philosophers seeking to explain natural phenomena and their development of early theories of matter. It then discusses key figures like Robert Boyle, Antoine Lavoisier, John Dalton who established modern chemistry.
2) The main branches of chemistry including organic, inorganic, physical, analytical, and biochemistry. It also discusses the importance of chemistry in fields like medicine, engineering, agriculture and more.
3) Desirable qualities of scientists like curiosity, perseverance, and open-mindedness that allow them to solve problems and make discoveries. It provides examples of famous Filipino chemists.
This document discusses concepts related to matter and energy including physical and chemical properties, states of matter, density, and phase changes. It provides examples of physical measurements and calculations related to identifying substances. It also includes practice problems related to these concepts testing understanding of fundamental vs. derived quantities, states of matter, physical and chemical changes, and nuclear reactions.
This document contains answers to questions about cells and cell organelles. Key points:
- The shape of a cell is determined by its location and function.
- Unicellular organisms are single-celled, like Euglena and Amoeba. Multicellular organisms have many cells, like humans and birds.
- Mitochondria are known as the "powerhouse of the cell" because that is where cellular respiration occurs to produce energy.
The document provides instructions for a chemistry exam consisting of multiple choice and constructed response questions. It outlines rules for the exam such as showing work, permitted materials, and time limit. The appendix includes chemistry formulas, quantities, and the periodic table of elements as reference materials for the exam questions.
- Earth is the only planet that gave rise to complex life.
- Major human activities cause destruction to Earth's subsystems through a boomerang effect. As a student, the best recommendation is to start making changes from yourself by reducing pollution.
- Sedimentary rocks usually form in bodies of water.
1) Four key processes were needed for the spontaneous origin of life on Earth: the synthesis of simple organic molecules, the assembly of these molecules into polymers, the origin of self-replicating molecules making inheritance possible, and the packaging of these molecules into membranes.
2) Miller and Urey's experiments in 1953 sought to recreate early Earth conditions and demonstrated the formation of amino acids from simpler components in the atmosphere, supporting the hypothesis of chemical evolution.
3) Comets may have delivered organic compounds to Earth, as analysis shows they contain complex organic molecules and panspermia suggests hardy bacteria could survive in space.
test bank Principles of Life Digital Update, 3e by David Hillis, Mary Price, ...NailBasko
This document provides a test bank with questions and answers for Chapter 1 of the textbook "Principles of Life Digital Update, 3e by David Hillis, Mary Price, Richard Hill, David Hall, Marta Laskowski". It includes 53 multiple choice questions testing foundational concepts in biology, such as the definition of life, cellular structure, evolution, and the tree of life. The questions cover topics like the basic unit of life (the cell), the early evolution of life on Earth, the emergence of eukaryotes and multicellular organisms, and the three domain system of classifying life.
This document contains a 10 question science quiz covering topics in earth science, biology, chemistry and physics. It includes multiple choice questions that test understanding of concepts such as how bone meal helps plants grow, global warming predictions, nerve signal transmission, energy transformations, planetary layers and properties of light. The quiz is divided into three sections of increasing difficulty: Easy, Average and Difficult rounds.
These factors interact in complex ways to create a habitable environment on Earth. The unique combination of these conditions makes our planet an oasis of life in the cosmos and underscores the significance of preserving and protecting the delicate balance that sustains life on Earth.
This document discusses heat and temperature. It begins by explaining early theories of heat, including the caloric fluid theory which was later disproven. It then discusses sources of heat, both natural like the sun and artificial like chemical reactions. Key terms are defined, like conduction, convection and radiation as methods of heat transfer. Common temperature scales are explained including Celsius, Fahrenheit and Kelvin. Effects of heat like expansion and phase changes are covered. The document concludes with a short quiz to test the reader's understanding.
This lesson plan explores the structure and function of DNA through building a 3D model and extracting DNA from cheek cells. Students first create a DNA model using candy and toothpicks to represent nucleotides and base pairing. Next, they purify DNA from their own cheek cells using a kit. The extraction involves breaking open cells, precipitating DNA with alcohol and salt, and visualizing the extracted DNA. The lesson aims to give students hands-on experience visualizing key characteristics of DNA.
genetically modified organisms. earth and life scienceMAHAZELTEOLOGO3
Genetic engineering is a process that uses laboratory technologies to alter the DNA makeup of an organism. A genetically modified organism is an animal, plant, or microbe whose DNA has been altered using genetic engineering techniques. Genetic engineering can be used to develop crops that are resistant to pests, diseases, or environmental conditions.
The document discusses evolution and its supporting theories and evidence. It covers Lamarck's theory of inheritance of acquired characteristics and Darwin's theory of natural selection and common descent. Key evidence includes the fossil record showing gradual changes over generations, comparative anatomy revealing homologous structures, and molecular biology finding similar DNA and proteins across species. Evolution has transformed life on Earth from early forms to today's diversity through genetic changes across generations that increase fitness for an organism's environment.
Chapter 11 DNA Structure and Replication RNA and Protien Synthesis 2017.pptMAHAZELTEOLOGO3
DNA contains the genetic blueprint and is made up of nucleotides. It takes the shape of a double helix and replicates before cell division. During transcription, a complementary mRNA copy is made from DNA in the nucleus. The mRNA then transports the genetic message to the cytoplasm for translation by ribosomes into proteins. Transfer RNA molecules ferry amino acids to the ribosome according to mRNA codons to assemble proteins. Mutations in DNA can occur and be passed down or remain in somatic cells only.
This document outlines the intended learning outcomes for science in grades 7-8 in Utah. It discusses six main categories of skills and understanding that students should develop: 1) using science process and thinking skills, 2) demonstrating understanding of science concepts and principles, 3) communicating effectively using science language and reasoning, 4) demonstrating awareness of social and historical aspects of science, 5) demonstrating understanding of the nature of science, and 6) using these skills to answer multiple choice questions about science examples and experiments.
This document provides an overview of chemistry and its importance. It discusses:
1) How chemistry began with early Greek philosophers seeking to explain natural phenomena and their development of early theories of matter. It then discusses key figures like Robert Boyle, Antoine Lavoisier, John Dalton who established modern chemistry.
2) The main branches of chemistry including organic, inorganic, physical, analytical, and biochemistry. It also discusses the importance of chemistry in fields like medicine, engineering, agriculture and more.
3) Desirable qualities of scientists like curiosity, perseverance, and open-mindedness that allow them to solve problems and make discoveries. It provides examples of famous Filipino chemists.
This document discusses concepts related to matter and energy including physical and chemical properties, states of matter, density, and phase changes. It provides examples of physical measurements and calculations related to identifying substances. It also includes practice problems related to these concepts testing understanding of fundamental vs. derived quantities, states of matter, physical and chemical changes, and nuclear reactions.
This document contains answers to questions about cells and cell organelles. Key points:
- The shape of a cell is determined by its location and function.
- Unicellular organisms are single-celled, like Euglena and Amoeba. Multicellular organisms have many cells, like humans and birds.
- Mitochondria are known as the "powerhouse of the cell" because that is where cellular respiration occurs to produce energy.
The document provides instructions for a chemistry exam consisting of multiple choice and constructed response questions. It outlines rules for the exam such as showing work, permitted materials, and time limit. The appendix includes chemistry formulas, quantities, and the periodic table of elements as reference materials for the exam questions.
- Earth is the only planet that gave rise to complex life.
- Major human activities cause destruction to Earth's subsystems through a boomerang effect. As a student, the best recommendation is to start making changes from yourself by reducing pollution.
- Sedimentary rocks usually form in bodies of water.
1) Four key processes were needed for the spontaneous origin of life on Earth: the synthesis of simple organic molecules, the assembly of these molecules into polymers, the origin of self-replicating molecules making inheritance possible, and the packaging of these molecules into membranes.
2) Miller and Urey's experiments in 1953 sought to recreate early Earth conditions and demonstrated the formation of amino acids from simpler components in the atmosphere, supporting the hypothesis of chemical evolution.
3) Comets may have delivered organic compounds to Earth, as analysis shows they contain complex organic molecules and panspermia suggests hardy bacteria could survive in space.
test bank Principles of Life Digital Update, 3e by David Hillis, Mary Price, ...NailBasko
This document provides a test bank with questions and answers for Chapter 1 of the textbook "Principles of Life Digital Update, 3e by David Hillis, Mary Price, Richard Hill, David Hall, Marta Laskowski". It includes 53 multiple choice questions testing foundational concepts in biology, such as the definition of life, cellular structure, evolution, and the tree of life. The questions cover topics like the basic unit of life (the cell), the early evolution of life on Earth, the emergence of eukaryotes and multicellular organisms, and the three domain system of classifying life.
This document contains a 10 question science quiz covering topics in earth science, biology, chemistry and physics. It includes multiple choice questions that test understanding of concepts such as how bone meal helps plants grow, global warming predictions, nerve signal transmission, energy transformations, planetary layers and properties of light. The quiz is divided into three sections of increasing difficulty: Easy, Average and Difficult rounds.
These factors interact in complex ways to create a habitable environment on Earth. The unique combination of these conditions makes our planet an oasis of life in the cosmos and underscores the significance of preserving and protecting the delicate balance that sustains life on Earth.
This document discusses heat and temperature. It begins by explaining early theories of heat, including the caloric fluid theory which was later disproven. It then discusses sources of heat, both natural like the sun and artificial like chemical reactions. Key terms are defined, like conduction, convection and radiation as methods of heat transfer. Common temperature scales are explained including Celsius, Fahrenheit and Kelvin. Effects of heat like expansion and phase changes are covered. The document concludes with a short quiz to test the reader's understanding.
This lesson plan explores the structure and function of DNA through building a 3D model and extracting DNA from cheek cells. Students first create a DNA model using candy and toothpicks to represent nucleotides and base pairing. Next, they purify DNA from their own cheek cells using a kit. The extraction involves breaking open cells, precipitating DNA with alcohol and salt, and visualizing the extracted DNA. The lesson aims to give students hands-on experience visualizing key characteristics of DNA.
genetically modified organisms. earth and life scienceMAHAZELTEOLOGO3
Genetic engineering is a process that uses laboratory technologies to alter the DNA makeup of an organism. A genetically modified organism is an animal, plant, or microbe whose DNA has been altered using genetic engineering techniques. Genetic engineering can be used to develop crops that are resistant to pests, diseases, or environmental conditions.
The document discusses evolution and its supporting theories and evidence. It covers Lamarck's theory of inheritance of acquired characteristics and Darwin's theory of natural selection and common descent. Key evidence includes the fossil record showing gradual changes over generations, comparative anatomy revealing homologous structures, and molecular biology finding similar DNA and proteins across species. Evolution has transformed life on Earth from early forms to today's diversity through genetic changes across generations that increase fitness for an organism's environment.
Chapter 11 DNA Structure and Replication RNA and Protien Synthesis 2017.pptMAHAZELTEOLOGO3
DNA contains the genetic blueprint and is made up of nucleotides. It takes the shape of a double helix and replicates before cell division. During transcription, a complementary mRNA copy is made from DNA in the nucleus. The mRNA then transports the genetic message to the cytoplasm for translation by ribosomes into proteins. Transfer RNA molecules ferry amino acids to the ribosome according to mRNA codons to assemble proteins. Mutations in DNA can occur and be passed down or remain in somatic cells only.
Q1C1L3 Life on Earth.pptx Q1C1L3 Life on Earth.pptxMAHAZELTEOLOGO3
This document discusses the key factors that make Earth unique in its ability to support life. It explains that the presence of liquid water allowed the first photosynthetic organisms to emerge and produce oxygen. The Earth's ability to maintain heat from both its core and the Sun through the greenhouse effect enables photosynthesis and habitable temperatures. Additionally, the atmosphere creates a greenhouse effect and influences surface conditions crucial for biodiversity.
The document discusses several theories for the origin of the solar system:
1) The Nebular Hypothesis proposes that the solar system formed from a cloud of gas and dust that collapsed under gravity and spun to form a disk that later condensed into planets.
2) The Planetesimal and Tidal Theories suggest that close passes from other stars disturbed the solar nebula and caused material to break off and form numerous small planetesimals that eventually merged into planets.
3) The Protoplanet Theory modified the Nebular Hypothesis, proposing that turbulence in the solar nebula caused it to break into dense whirlpools that became the early protoplanets.
1. The document discusses plant and animal organ systems and their functions, focusing on reproduction. It describes both asexual and sexual reproduction in animals.
2. Sexual reproduction involves the fusion of egg and sperm to form a zygote, while asexual reproduction does not involve fertilization.
3. The document outlines the key reproductive organs in male and female humans and other animals like ovaries, testes, penis, and vagina.
4. It also discusses fertilization, important reproductive variations, and the nutrient requirements for plants.
The Calvin cycle fixes carbon from CO2 into organic molecules to build three-carbon sugars. It occurs in the stroma of chloroplasts and is fueled by ATP and NADPH from the light reactions. The cycle involves three main stages: carbon fixation adds CO2 to RuBP, reduction uses ATP and NADPH to convert the product into G3P, and regeneration recycles G3P to regenerate RuBP using ATP through a series of reactions.
The document discusses fire hazards and fire safety. It explains the fire triangle which illustrates that three elements (fuel, heat, and oxygen) are needed for a fire to ignite. Fires can be extinguished by removing one of these elements, such as through cooling, starving the fire of fuel, or smothering to remove oxygen. There are different classes of fires that require specific extinguishing methods - Class A involves ordinary combustibles, Class B involves liquids/gases, Class C electrical fires, Class D metallic fires, and Class K grease/cooking fires. The document provides guidance on what to do if a fire starts, including how to operate a fire extinguisher safely and remembering to get out, stay out
Q1C2L1 Types of Solutions general chemistry 2.pptxMAHAZELTEOLOGO3
This document discusses different types of mixtures including homogeneous and heterogeneous mixtures. Homogeneous mixtures are solutions that are evenly distributed while heterogeneous mixtures are not evenly distributed. Heterogeneous mixtures include suspensions, where particles settle out, and colloids, where particles are dispersed but do not settle out. Solutions are homogeneous mixtures of a solute dissolved in a solvent where the components are evenly mixed on an atomic scale.
The document discusses collision theory, which explains that for a chemical reaction to occur, reactant particles must collide with sufficient energy to overcome the activation energy barrier. It explains how factors like concentration, temperature, surface area, and catalysts affect the rate of reaction by influencing the frequency and success of collisions between reactants. Catalysts specifically provide an alternative reaction pathway with lower activation energy.
This document discusses the nature of light and quanta. It explains that light propagates as electromagnetic waves that can be described by amplitude, wavelength, and frequency. Max Planck proposed the quantum theory which holds that light energy is quantized in multiples of Planck's constant times the frequency of light. This means light exists as both waves and particles called photons, whose energy is calculated using Planck's constant and the frequency of light.
This document contains definitions and explanations of key terms related to cell biology. It discusses the stages of the cell cycle including interphase and mitosis. It also describes meiosis, comparing it to mitosis. Meiosis is outlined in its two stages, discussing genetic variation. Examples of genetic disorders are provided like Down Syndrome. Overall, the document provides an overview of the cell cycle, mitosis, meiosis, and some related genetic concepts.
The document discusses different types of motions observed in the ancient astronomy including diurnal motion, annual motion, and precession of equinoxes. Diurnal motion refers to the daily east-west rotation of the celestial sphere. Annual motion is caused by the Earth's revolution around the sun and results in the apparent westward shift of stars relative to the sun over the course of a year. Precession of equinoxes is the slow westward motion of the equinoxes along the ecliptic due to Earth's axial precession, and was discovered by the Greek astronomer Hipparchus.
The binding of cosmological structures by massless topological defectsSérgio Sacani
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
Or: Beyond linear.
Abstract: Equivariant neural networks are neural networks that incorporate symmetries. The nonlinear activation functions in these networks result in interesting nonlinear equivariant maps between simple representations, and motivate the key player of this talk: piecewise linear representation theory.
Disclaimer: No one is perfect, so please mind that there might be mistakes and typos.
dtubbenhauer@gmail.com
Corrected slides: dtubbenhauer.com/talks.html
Immersive Learning That Works: Research Grounding and Paths ForwardLeonel Morgado
We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...Advanced-Concepts-Team
Presentation in the Science Coffee of the Advanced Concepts Team of the European Space Agency on the 07.06.2024.
Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...University of Maribor
Slides from talk:
Aleš Zamuda: Remote Sensing and Computational, Evolutionary, Supercomputing, and Intelligent Systems.
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Inter-Society Networking Panel GRSS/MTT-S/CIS Panel Session: Promoting Connection and Cooperation
https://www.etran.rs/2024/en/home-english/
Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...AbdullaAlAsif1
The pygmy halfbeak Dermogenys colletei, is known for its viviparous nature, this presents an intriguing case of relatively low fecundity, raising questions about potential compensatory reproductive strategies employed by this species. Our study delves into the examination of fecundity and the Gonadosomatic Index (GSI) in the Pygmy Halfbeak, D. colletei (Meisner, 2001), an intriguing viviparous fish indigenous to Sarawak, Borneo. We hypothesize that the Pygmy halfbeak, D. colletei, may exhibit unique reproductive adaptations to offset its low fecundity, thus enhancing its survival and fitness. To address this, we conducted a comprehensive study utilizing 28 mature female specimens of D. colletei, carefully measuring fecundity and GSI to shed light on the reproductive adaptations of this species. Our findings reveal that D. colletei indeed exhibits low fecundity, with a mean of 16.76 ± 2.01, and a mean GSI of 12.83 ± 1.27, providing crucial insights into the reproductive mechanisms at play in this species. These results underscore the existence of unique reproductive strategies in D. colletei, enabling its adaptation and persistence in Borneo's diverse aquatic ecosystems, and call for further ecological research to elucidate these mechanisms. This study lends to a better understanding of viviparous fish in Borneo and contributes to the broader field of aquatic ecology, enhancing our knowledge of species adaptations to unique ecological challenges.
Authoring a personal GPT for your research and practice: How we created the Q...Leonel Morgado
Thematic analysis in qualitative research is a time-consuming and systematic task, typically done using teams. Team members must ground their activities on common understandings of the major concepts underlying the thematic analysis, and define criteria for its development. However, conceptual misunderstandings, equivocations, and lack of adherence to criteria are challenges to the quality and speed of this process. Given the distributed and uncertain nature of this process, we wondered if the tasks in thematic analysis could be supported by readily available artificial intelligence chatbots. Our early efforts point to potential benefits: not just saving time in the coding process but better adherence to criteria and grounding, by increasing triangulation between humans and artificial intelligence. This tutorial will provide a description and demonstration of the process we followed, as two academic researchers, to develop a custom ChatGPT to assist with qualitative coding in the thematic data analysis process of immersive learning accounts in a survey of the academic literature: QUAL-E Immersive Learning Thematic Analysis Helper. In the hands-on time, participants will try out QUAL-E and develop their ideas for their own qualitative coding ChatGPT. Participants that have the paid ChatGPT Plus subscription can create a draft of their assistants. The organizers will provide course materials and slide deck that participants will be able to utilize to continue development of their custom GPT. The paid subscription to ChatGPT Plus is not required to participate in this workshop, just for trying out personal GPTs during it.
The technology uses reclaimed CO₂ as the dyeing medium in a closed loop process. When pressurized, CO₂ becomes supercritical (SC-CO₂). In this state CO₂ has a very high solvent power, allowing the dye to dissolve easily.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
2. Microwaves were invented during World War II when radar technology
was being developed. In the last 40 years, the microwave oven has
become a ubiquitous appliance. Microwave technology enables us to
thaw and cook food much more rapidly than conventional appliances
do. The cooking action in a microwave oven results from the interaction
between the electric the field component of the radiation with the
polar molecules—mostly water—in food. All molecules rotate at room
temperature. If the frequency of the radiation and that of the
molecular rotation are equal, energy can be transferred from the
microwave to the polar molecule. As a result, the molecule will rotate
faster. This is what happens in a gas. In the condensed state (for
example, in food), a molecule cannot execute the free rotation.
Nevertheless, it still experiences a torque (a force that causes rotation)
that tends to align its dipole moment with the oscillating field of the
microwave. Consequently, there is friction between the molecules,
which appears as heat in the food. (Source).
3. Which of the following statements best describe
why microwaves heat food so quickly?
A. The radiation is absorbed by nonpolar molecules
that created friction and will generate heat in food.
B. The radiation is absorbed by polar molecules and
can, therefore, reach different parts of food at the
same time.
C. The polar molecules in foods when exposed to
radiation will heat and cooks the food.
D. The nonpolar molecules in foods when exposed
to radiation will heat and cooks the food.
5. Which of the following statements is correct about food
containers that are utilized and safe for microwaves?
A. They do not contain polar molecules and are
therefore not affected by microwaves.
B. They contain polar molecules and are therefore affected
by microwaves.
C. They do not contain nonpolar molecules and are
therefore not affected by microwaves.
D. They contain nonpolar molecules and are therefore
affected by microwaves
6. A student heated a beaker of cold water (on a tripod) with an
alcohol lamp. When the gas is ignited, the student noticed that
there was water condensed on the outside of the beaker. Which
of the statements best described the observation?
A. The gases from the environment react with the heat from the
alcohol lamp and condense.
B. The gases from the alcohol lamp condense on the outside of
the cold beaker.
C. The water from the container seeps into the wall of the beaker.
D. When methane burns in the air, it forms carbon dioxide and
water vapor. The water vapor condenses on the outside of the
cold beaker.
7. 17. Suppose you are hiking in one of the mountains of
Bukidnon. Upon reaching your destined area, you
decide to hard-boil an egg and eat it to help regain
your strength following the strenuous work. To your
surprise, the water seems to boil more quickly than
usual, but after 10 min in boiling water, the egg is still
not cooked. Due to a decrease in atmospheric
pressure, it takes less energy to bring the water to its
boiling point. Hence due to less energy needed, the
water boils at a lower temperature. The summit of the
mountain is 9,511 ft above sea level. At this altitude,
the atmospheric pressure is only about 0.7 atm.
8. Figure 1 below shows how pressure affects the melting
point and boiling point of water.
Figure 1. This phase diagram tells us that increasing the pressure on ice lowers its
melting point and that increasing the pressure of liquid water raises its boiling point.
9. Which of the following statements best described your
observation?
A. The amount of heat delivered is inversely proportional to
the temperature of the water, so it takes a longer time to hard
boil the eggs.
B. Because water boils at a lower temperature at high
altitudes, hard-cooked eggs will take longer to prepare.
C. At higher altitudes, the air pressure is higher, so the boiling
point of water decreases thus needing more time in cooking
eggs.
D. At higher elevations, the higher atmospheric pressure
means heated water reaches its boiling point more quickly.
10. In 1985 a British chemist named Alec Jeffreys
suggested that minisatellite sequences provide
a means of identification, much like
fingerprints. DNA fingerprinting has since
gained prominence with law enforcement
officials to identify crime suspects.
11. To make a DNA fingerprint, a chemist needs a sample of any tissue,
such as blood or semen; even hair and saliva contain DNA. The DNA
is extracted from cell nuclei and cut into fragments by the addition
of so-called restriction enzymes. These fragments, which are
negatively charged, are separated by an electric field in gel. The
smaller fragments move faster than larger ones, so they eventually
separate into bands. The bands of DNA fragments are transferred
from the gel to a plastic membrane, and their position is thereby
fixed. Then a DNA probe—a DNA fragment that has been tagged
with a radioactive label—is added. The probe binds to the fragments
that have a complementary DNA sequence. An X-ray film is laid
directly over the plastic sheet, and bands appear on the exposed
film in the positions corresponding to the fragments recognized by
the probe. About four different probes are needed to obtain a
profile that is unique to just one individual.
12. The first U.S. case in which a person was
convicted of a crime with the help of DNA
fingerprints was tried in 1987. Today, DNA
fingerprinting has become an
indispensable tool of law enforcement.
Source: Chang, Raymond, Overby, Jason. (2022). Chemistry Fourteenth
Edition. New York: McGraw-Hill (adapted)
13. 18. The following statements explain how DNA profiling
(fingerprinting) can be used to identify people by their
unique genetic code EXCEPT.
A. identify suspects whose DNA may match evidence left at
crime scenes
B. clear persons wrongly accused of crimes
C. identify fathers in paternity cases
D. identify unknown remains using ashes.
14. Which of the following is the correct order for obtaining a DNA
fingerprint?
I. X-ray fil detects radioactive patterns. These patterns are then
compared to the original sample.
II. DNA is extracted from the blood sample, then the restriction
enzymes cut DNA into fragments
III. Fragments are separated by gel electrophoresis and the band
pattern is transferred to a nylon membrane
IV. Radioactive DNA probe binds to specific DNA sequences
A. III, II, I, IV B. I, III, IV, II C. II, III, IV, I D. IV, I, III, II
15.
16. Which of the statements regarding enzymes is
true?
A. Enzymes cannot be used for a specific
reaction.
B. Enzymes provide activation energy for
reactions.
C. Enzymes are proteins that function as
catalysts.
D. Enzyme activity cannot be regulated.
17. Which of the following best describes the role of a
catalyst in a chemical reaction?
A. A substance that is being used during a chemical
reaction.
B. Catalysts increase the activation energy of a
chemical reaction.
C. A catalyst decreases the speed of a reaction and
lowers product yield.
D. A substance that speeds up a chemical reaction
without being used up.
18. To make bread dough, a cook mixes flour, water, salt
and yeast. After mixing, the dough is placed in a
container for several hours to allow the process of
fermentation to take place. During fermentation, a
chemical change occurs in the dough: the yeast (a
single-celled fungus) helps to transform the starch and
sugars in the flour into carbon dioxide and alcohol. A
few hours after mixing the dough, the cook weighs
the dough and observes that its weight has
decreased. The weight of the dough is the same at the
start of each of the four experiments shown below.
19.
20. Which two experiments should the cook compared
to test if the yeast is the cause of the loss of
weight?
A. The cook should compare experiments 1 and 2.
B. The cook should compare experiments 1 and 3.
C. The cook should compare experiments 2 and 4.
D. The cook should compare experiments 3 and 4.
21. The bread consumed will be degraded, or broken down, in our bodies to
provide energy for growth and function. A general overall equation for this
very complex process represents the degradation of glucose (C6H12O6) to
carbon dioxide (CO2) and water (H2O):
If 500.0 g of C6H12O6 is consumed by a person over a certain period, what is
the mass (in gram, g) of CO2 and H2O produced? ( 6C12.01 1H1.01 8O16.0 )
The chemical reaction is C6H12O6 + O2 CO2 + H2O
A. 311.2 g CO2 and 650.0 g H2O C. 732.8 g CO2 and 300.0 g H2O
B. 150.0 g CO2 and 903.4 g H2O D. 545.20 g CO2 and 447.0 g H2O
22. Four boxes contain different organisms. Box
A has organism with a waxy cuticle to
protect it against water loss. Box B contains
organism with Xylem and Phloem. Inside
Box C is an organism with connective tissues
like cartilage, blood, bone, and adipose. Box
D has organism with unspecified tissues. Its
tendons are covered with Xylem and
phloem while its hairs are attached directly
to its bones with no epithelial tissues at all.
23. Which of the following boxes
contains an animal?
A. Box B B. Box C
B. C. Box A D. Box D
24. Which of the following boxes
contains organism that is NOT a
plant?
A. Box C B. Box B
C. Box E D. Box A
25. Which of the following tissue can also be found
in Box A and B?
A. Muscular Tissue C. Neural Tissue
B. Vascular Tissue D. Epithelial Tissue
26. An unidentified flying object (UFO) has cells with a
typical nucleus with a nuclear envelope, where its
DNA lies inside it and is commonly linear. It does not
have mesosomes yet contains Golgi apparatus. Which
of the following statements best describes this UFO?
A. The UFO is a prokaryote.
B. It is a kind of bacteria.
C. It definitely possesses a eukaryotic cell.
D. It is probably an alien with indistinct feature.
27. •Plants and animals may reproduce either sexually or
asexually. In both cases, this is the reason why species
survived for thousands of years. Just like any other
vertebrates for example, human reproduce sexually by the
joint of a sperm cell and egg cell to form embryo. On the
other hand, some organisms like bacteria and sponges
reproduce having no gametes involved. Yet, there are also
exceptional cases that some organisms may reproduce
like for example those honey bees and even earthworms
are called hermaphrodites. However, unlike animals,
reproduction in plants specifically in Gumamela is unique
and is termed double fertilization.
28. Which of the following scenario is TRUE?
A. Honey bees are some of the viviparous
organisms.
B. Earthworms have both male and female
reproductive organs.
C. Sponges give birth through live placental
birth.
D. Bacteria are some of the oviparous
organisms.
29. Why is fertilization in Gumamela plants
termed as double fertilization?
A. Only those complete flowers may have
double fertilization.
B. All plants both have male and female parts.
C. Only those perfect flowers can have double
fertilization.
D. Since there are two sperm cells involved in
the fertilization of egg cell and two polar
bodies.
30. •Thirdy’s botanical garden seemed to amuse the locals
of Bukidnon. However, there are times that his plants
are attacked by some pathogens thereby becoming
vulnerable. One of them is the mayana particularly its
leaves. Luckily, there are some plants that can resist
diseases. Unlike its neighbor plants, the entire kalabo
plant, gabon- gabon, asunting, and lagundi are
resistant to infection. Sometimes, there are also
herbivores that roam around which created mess
inside the botanical garden. Thirdy noticed that these
herbivores seemed to have eaten specific plants
while refusing some.
31. Which of the following immune responses do
kalabo plant, gabon-gabon, asunting, and
lagundi possess?
A. Basal response
B. Hypersensitive response
C. Systemic acquired immunity
D. Jasmonic acid/ethylene pathway