The document discusses various methods of radioactive dating. It defines key terms like half-life, decay curve, and radiocarbon dating. It explains that radiocarbon dating works by measuring the ratio of carbon-14 to carbon-12 in once-living materials, and that this ratio decreases over time as the carbon-14 decays. Common parent-daughter isotope pairs used for dating are described, such as potassium-40 decaying to argon-40, which has a half-life of 1.3 billion years.
Detection of Radioactivity
Characteristics of the Three Types of Emission
Nuclear Reactions
Half-Life
Uses of Radioactive Isotopes Including Safety Precautions
Detection of Radioactivity
Characteristics of the Three Types of Emission
Nuclear Reactions
Half-Life
Uses of Radioactive Isotopes Including Safety Precautions
Et undervisningsforløb om, hvordan Gud kalder os ind i en dybere relation med sig selv. Deltagerne skal under dette tema lytte til undervisning om, hvordan Gud kalder mennesker til at tro, og hvordan hans rige kan blive virkelig, når vi tror.
Grade 8 Integrated Science Chapter 16 Lesson 3 on absolute age dating of fossils. This lesson follows the last lesson about relative age dating. This chapter describes radiometric age dating with explanations of radioactive decay and half-life. There is also a short explanation of igneous, metamorphic, and sedimentary age dating. The goal is that students understand radioactive decay, half-life, and how this can be used to determine the age of carbon fossils and different types of rocks.
Carbon 14 and archeological ages, Christian and Intelligent Design discussion of source, measurement, results, interpretation, and errors in Carbon-14 dating.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
2. Carbon Dating
• We can measure the radioactivity in plants or
animals and how it has changed
• All organisms on the Earth contain carbon
• Radiocarbon dating: the process of determining the
age of an object by measuring the amount of carbon-
14 remaining.
• A living organisms have approximately the same ratio
of carbon-12 to carbon-14
• When an organism dies the carbon-14 atoms decay
over time
3. The Rate of Radioactive Decay
• The rate of radioactive decay can be compared using
a quantity called half-life
• Half-life: the time required for half of the radioactive
(unstable) material to decay into a more stable
material.
• The shorter the half-life, the faster the decay
• The half-life of strontium-90 is 29 years, if you have
20g of strontium-90 in 29 years you will have 10g
4. Using a Decay Curve
• All radioactive decay rates
follow a similar pattern
called a decay curve
• Decay curve: a curved line
on a graph that shows the
rate at which radioisotopes
decay.
• The difference between
different isotopes is the
length of their half-life
5. Common Isotope Pairs
• Parent isotope: the isotope that undergoes
radioactive decay
• Daughter isotope: the stable product of radioactive
decay
• Each isotope can be used for radiocarbon dating
• The dating range is different depending on the half-
life of the parent isotope
7. The Potassium-40 Clock
• Potassium-40/Argon-40 has a half life of 1.3 billion
years (as shown in common isotope pairs list)
• Argon-40 is found trapped in molten rocks in the
form of a gas as potassium-40 decays
• The ratio between the mass of potassium=40 and
argon-40 determines the age of the rock
– If there are equal masses of potassium-40 and argon-40
the rock is 1.3 billion years old(1 half-life)
8. Questions
1. Give the definition of the following:
b. Half-life
c. Decay curve
d. Radiocarbon dating
e. Daughter isotope
f. Parent isotope
2. What is the ratio of carbon-14 to carbon-12 in a living organism?
3. What happens to the ratio of carbon-14 to carbon-12 when an
organism dies?
4. If you have 10g of an element with a half-life of 10 years for much
of said element would you have in 20 years
5. What is the daughter isotope of Uranium-238?
6. What is the half-life of potassium-40/argon-40?
9. Answers
1. Definitions
b. Half-life: the time required for half of the radioactive (unstable) material to
decay into a more stable material.
c. Decay curve: a curved line on a graph that shows the rate at which
radioisotopes decay.
d. Radiocarbon dating: the process of determining the age of an object by
measuring the amount of carbon-14 remaining.
e. Daughter isotope: the stable product of radioactive decay
f. Parent isotope: the isotope that undergoes radioactive decay
2. There is an equal amount of carbon-12 to carbon-14
3. The ratio of carbon-14 to carbon-12 decreases. There becomes less
carbon-14 as it decays
4. 2.5g
5. Lead-206
6. 1.3 billion years
