The Moon, Our Natural Satellite
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The Moon, earth's natural satellite and its nearest companion brings much fascination and adoration to the humankind. This article provides some interesting facts and figures associated with the Moon.
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NATURAL SATELLITE (THE MOON)
The document discusses the moon and its phases. It begins by asking students to discuss what they know about the moon with a partner. It then provides information about the moon, including that it is Earth's only natural satellite, the largest relative to its planet, and non-luminous. The document discusses the different phases of the moon, which are caused by the changing angles between the sun, Earth and moon. Students learn that half the moon is illuminated by the sun at any time.
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The document discusses observations about the sky, sun, moon, stars, and planets:
1. The sun appears to go below the horizon at night but does not disappear - it is a star that gives light and heat to Earth.
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The document discusses the sun and solar system. It states that the sun is a huge ball of fire that gives heat and light. It also notes that the solar system contains 8 planets including Earth that orbit the sun, and satellites such as Earth's moon orbit around planets. Mercury is the smallest planet, Earth is third from the sun and the only known to have life, and Jupiter is the largest planet in the solar system.
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The solar system is made up of the Sun, the planets that orbit the Sun, their satellites, dwarf planets and many, many small objects, like asteroids and comets. All of these objects move and we can see these movements. We notice the Sun rises in the eastern sky in the morning and sets in the western sky in the evening. We observe different stars in the sky at different times of the year.
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The Moon is Earth's natural satellite and orbits our planet in synchronous rotation. It formed over 4 billion years ago when a Mars-sized object collided with Earth, ejecting debris that coalesced into the Moon. The leading theory is the giant impact hypothesis. The Moon has no atmosphere and its landscape and composition differ from Earth's due to the lack of weathering and tectonic activity. Its gravitational pull causes Earth's ocean tides to rise and fall in regular cycles.
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Power Point notes that I use in class. I did not make this presentation. I got it from the internet, the reference is on the first page. I may have altered it from it\'s origninal state though.
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The document discusses various terms related to the moon including its phases, features, effect on tides, and history of exploration. It defines waxing as when the moon appears to grow in size, waning as when it decreases in size, and gibbous as between a half circle and full circle of illumination. It notes the moon's seas are dark patches formed by ancient lava flows and that phases refer to how much is illuminated each day. A harvest moon is a full moon near the autumn equinox that rises earlier each night. The first men on the moon were Neil Armstrong and Buzz Aldrin in 1969.
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The document discusses the moon and its phases. It begins by asking students to discuss what they know about the moon with a partner. It then provides information about the moon, including that it is Earth's only natural satellite, the largest relative to its planet, and non-luminous. The document discusses the different phases of the moon, which are caused by the changing angles between the sun, Earth and moon. Students learn that half the moon is illuminated by the sun at any time.
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1. The sun appears to go below the horizon at night but does not disappear - it is a star that gives light and heat to Earth.
2. The sun warms the Earth unevenly throughout the day, appearing low in the morning and evening and high at noon when it is hottest.
3. The moon does not produce its own light but reflects the sun's light, appearing in the night sky and sometimes during the day, with its shape changing over 28 days as it orbits Earth.
4. Stars are very distant suns that appear as patterns or constellations in the night sky, like
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The document discusses the sun and solar system. It states that the sun is a huge ball of fire that gives heat and light. It also notes that the solar system contains 8 planets including Earth that orbit the sun, and satellites such as Earth's moon orbit around planets. Mercury is the smallest planet, Earth is third from the sun and the only known to have life, and Jupiter is the largest planet in the solar system.
Sun, Moon, and Earth system
The solar system is made up of the Sun, the planets that orbit the Sun, their satellites, dwarf planets and many, many small objects, like asteroids and comets. All of these objects move and we can see these movements. We notice the Sun rises in the eastern sky in the morning and sets in the western sky in the evening. We observe different stars in the sky at different times of the year.
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The Moon is Earth's natural satellite and orbits our planet in synchronous rotation. It formed over 4 billion years ago when a Mars-sized object collided with Earth, ejecting debris that coalesced into the Moon. The leading theory is the giant impact hypothesis. The Moon has no atmosphere and its landscape and composition differ from Earth's due to the lack of weathering and tectonic activity. Its gravitational pull causes Earth's ocean tides to rise and fall in regular cycles.
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Power Point notes that I use in class. I did not make this presentation. I got it from the internet, the reference is on the first page. I may have altered it from it\'s origninal state though.
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The document discusses various terms related to the moon including its phases, features, effect on tides, and history of exploration. It defines waxing as when the moon appears to grow in size, waning as when it decreases in size, and gibbous as between a half circle and full circle of illumination. It notes the moon's seas are dark patches formed by ancient lava flows and that phases refer to how much is illuminated each day. A harvest moon is a full moon near the autumn equinox that rises earlier each night. The first men on the moon were Neil Armstrong and Buzz Aldrin in 1969.
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The document discusses the phases of the moon, including terminology like waxing, waning, and gibbous. It notes that the moon revolves around Earth every 28 days and goes through phases as the illuminated portion changes from new to full and back again. Key phases mentioned are new, crescent, quarter, and full moon. The document also briefly discusses lunar and solar eclipses.
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Ashish
The document provides information about several celestial bodies in our solar system:
The Moon is Earth's only natural satellite. It has dark volcanic maria and bright ancient crustal highlands marked by impact craters. Its prominence and cycle of phases have influenced culture.
Earth formed 4.54 billion years ago and life appeared within its first billion years. Estimates suggest the planet can support life for another 500 million to 2.3 billion years.
Mercury is the closest planet to the Sun with the greatest temperature variations. It has almost no atmosphere and its surface is heavily cratered, indicating geological inactivity for billions of years.
Objects in space
Comets are balls of frozen water, dust and gases that develop distinctive tails when heated by the Sun. They have four parts: the solid nucleus at the center, surrounded by a coma of gas and dust, with two tails - one of dust and one made of ionized gases. Asteroids are smaller rocky objects that orbit the Sun, many located in the asteroid belt between Mars and Jupiter. Large asteroids and comets have struck Earth in the past, including one hypothesized to have caused the extinction of the dinosaurs. Meteoroids are space rocks that burn up as meteors in Earth's atmosphere, with larger ones surviving to impact as meteorites. Moons orbit planets and range widely in size, composition and volcanic activity
Objects in space
Comets are balls of frozen water, dust and gases that develop distinctive tails when heated by the Sun. They have four parts: the solid nucleus at the center, surrounded by a coma of gas and dust, with two tails - one of dust and one made of ionized gases. Asteroids are smaller rocky objects that orbit the Sun, many located in the asteroid belt between Mars and Jupiter. Large asteroids and comets have struck Earth in the past, including one hypothesized to have caused the extinction of the dinosaurs. Meteoroids are space rocks that burn up as meteors in Earth's atmosphere, with larger ones surviving to impact as meteorites. Moons orbit planets and range greatly in size, composition and features such
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Eclipse and its types with asteroid comets and meteorites and black hole
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The Mystery of Black Holes
Black holes were first predicted by Einstein's theory of relativity in 1916. They are regions of space where gravity is so strong that not even light can escape. Black holes are formed when massive stars collapse at the end of their life cycles. There are two main types - stellar black holes, which are 10-20 times the mass of our sun, and supermassive black holes at the centers of galaxies, which can be millions of times more massive than the sun. Though once theoretical, black holes are now understood to exist throughout the universe and have profound effects on the structure and evolution of galaxies.
Our Closest Star, the Sun
Exploring our closest star, the Sun, its makeup, evolution, its place in the universe, and its significance to life on earth.
An Introduction to Japan
Learn how, over the centuries, Japan changed from a nation that possessed ancient cultural traditions to become one of the most economically and technologically advanced societies in the world.
Serengeti National Park
History, Geography, and other interesting facts about the Serengeti National Park in Tanzania, which is a natural wonder as well as a popular tourist attraction.
Milky way galaxy
The Milky Way galaxy is home to our solar system and contains approximately 100 billion stars. While astronomers have estimated the number of stars, the galaxy's exact mass is still unknown due to the presence of dark matter, which accounts for over 80% of the galaxy's mass. In a few billion years, the Milky Way galaxy will collide with the neighboring Andromeda galaxy. The document discusses several other interesting facts about the Milky Way galaxy's composition and future collision with Andromeda.
Planet Venus
Venus is the second planet from the sun and the brightest object in the sky after the sun. It appears luminous because it is comprised of dense carbon dioxide and sulfuric acid atmospheres. Venus has the hottest surface temperatures of any planet, averaging around 480°C due to extreme greenhouse effects. It revolves slowly, taking almost 225 Earth days to rotate once on its axis.
California
California has a long history and was originally inhabited by many Native American tribes like the Chumash and Maidu who spoke different languages. The first Europeans to arrive were Juan Rodriguez Cabrillo in 1542 and Sir Francis Drake in 1579. Spain began colonizing California in 1769 through building missions to convert Native Americans to Catholicism. After Mexico gained independence from Spain in 1821, California became a Mexican province. American settlers revolted against Mexico and formed the short-lived Bear Flag Republic in 1846 before California joined the United States later that year after the Mexican-American War.
Niagara falls
The beautiful Niagara Falls, one of the most visited tourist destinations, located at the border of the United States and Canada.
Mars, our Neighbor Red Planet
Mars is the second smallest planet in the solar system nicknamed the "Red Planet" due to its iron-rich soil. It has the largest volcano in the solar system called Olympus Mons, which is over 3 times taller than Everest. Mars also has two small moons called Phobos and Deimos and an atmosphere that is 100 times less dense than Earth's but can still support weather. While no current life has been found, water ice exists on Mars and research continues to understand if it could support human habitation.
An Exploration of the Comet
Comets are microscopic bodies made of ice and dust that formed during the early formation of the solar system. Their nuclei contain water, methane, and other ices. When heated by the Sun, these ices melt and form two tails - a dust tail and an ion tail. Comets originate from the Oort cloud and Kuiper belt, and are believed to have brought water and organic molecules to Earth. Famous comets include Halley's Comet which returns every 75 years, as well as Hale-Bopp and Hyakutake.
A Brief History of Texas
Texas has a long and diverse history dating back 11,000 years. Various indigenous tribes inhabited the land for millennia before Europeans arrived in the 1500s, including the Karankawa, Caddo, and Apache tribes who lived as hunters, farmers, and artisans. Spain first colonized Texas in the late 1500s, though French settlers also attempted colonization in the late 1600s. Texas broke from Spanish rule in 1821 when it became part of Mexico. American settlers immigrated but faced resistance from Mexican officials, leading to the Texas Revolution and Texas becoming an independent nation in 1836. Texas then joined the United States in 1845 as the 28th state.
Solar System’s Most Enigmatic Planet: Saturn
The document discusses Saturn, the second largest planet in the solar system. It is known for its mystical rings and takes approximately 30 Earth years to orbit the Sun. Saturn is mostly gaseous and has no solid surface, with powerful winds moving 10 times faster than hurricanes on Earth. Saturn's ring system is the most complicated in the solar system, made of ice and rock particles, and their existence has puzzled scientists. Saturn has over 50 moons, with Titan being the largest and possibly able to sustain life. Extensive research of Saturn and its moons will continue for years to come.
Hawaii, the 50th State of U.S.A.
Hawaii is an island state located in the Pacific Ocean about 2,400 miles southwest of the mainland United States. It was originally inhabited by Polynesians and became a kingdom in the early 1800s before being overtaken by American and European settlers who developed plantation economies of sugar and pineapple. Hawaii went on to become a US territory in 1900 and finally the 50th state in 1959.
Alaska
Alaska is the largest state in the United States, joining the union in 1959. It was originally explored by Europeans in the 1700s and became a Russian territory in the late 18th century, with Russian traders establishing settlements. The United States purchased Alaska from Russia in 1867 for $7.2 million. Gold rushes in the late 19th century increased settlement and Alaska gained importance during World War II due to its strategic location. Congress admitted Alaska as the 49th state in 1959.
Facts about flags
Flags come in various shapes and colors and represent different entities like countries, states, organizations, and religions. The study of flags is called vexillology. Most flags are made of cloth in a rectangular shape with emblems or color combinations. Common colors used are red, white, and blue which symbolize bravery, peace, and loyalty respectively. The United States flag was first adopted on June 14, 1777 and has undergone modifications over time but is still affectionately known as the "Red, White and Blue" or the "Stars and Stripes".
Communication skills
Public speaking is one of people's biggest fears. The document recommends taking communication classes or joining Toastmasters to practice and improve communication skills. Toastmasters provides a supportive environment for members to develop public speaking and leadership abilities. The author is a long-time member of Toastmasters and has used their training to enhance her own communication and leadership skills.
How Public Speaking Skills Can Impact Careers
Information technology professional Amita Vadlamudi has more than three decades of experience as a computer systems engineer. To stay current within the industry, Amita Vadlamudi continues her education, taking courses on topics such as HTML and JavaScript. She also focuses on honing her communication skills through membership with Toastmasters International.
The World's First Computer
The document discusses the world's first known mechanical computer, the Antikythera mechanism, which was discovered in 1901 in a shipwreck off the Greek island of Antikythera. Dating back to the 1st century BC, the mechanism was comprised of a complex system of over 30 bronze gears that could track and display astronomical information like the lunar phases, positions of the sun and moon, a 19-year calendar, and predict eclipses 223 months into the future. This discovery showcases the advanced engineering and astronomical knowledge of the ancient Greeks, with the technology then lost until the 14th century development of mechanical clocks in Europe.
Understanding Solar Eclipses
With a degree in computer sciences, Amita Vadlamudi went on to a career as a computer systems engineer with over three decades of experience. In her spare time, Amita Vadlamudi enjoys volunteering and serves as a shelf reader at her local library. She especially appreciates reading about astronomy.
Women of the American Revolution - Elizabeth Schuyler Hamilton
Amita Vadlamudi is experienced as a computer systems engineer in financial services. Amita Vadlamudi also takes a personal interest in American history. One area of history often neglected by scholars is the contribution of women to the American Revolution and subsequent early American political life; and one woman of particular interest to scholars of early America is Elizabeth Schuyler Hamilton, the wife of Alexander Hamilton.
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Women of the American Revolution - Elizabeth Schuyler Hamilton
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Pests of Storage_Identification_Dr.UPR.pdf
InIndia-post-harvestlosses-unscientificstorage,insects,rodents,micro-organismsetc.,accountforabout10percentoftotalfoodgrains
Graininfestation
Directdamage
Indirectly
•theexuviae,skin,deadinsects
•theirexcretawhichmakefoodunfitforhumanconsumption
About600speciesofinsectshavebeenassociatedwithstoredgrainproducts
100speciesofinsectpestsofstoredproductscauseeconomiclosses
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Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...
Context. The observation of several L-band emission sources in the S cluster has led to a rich discussion of their nature. However, a definitive answer to the classification of the dusty objects requires an explanation for the detection of compact Doppler-shifted Brγ emission. The ionized hydrogen in combination with the observation of mid-infrared L-band continuum emission suggests that most of these sources are embedded in a dusty envelope. These embedded sources are part of the S-cluster, and their relationship to the S-stars is still under debate. To date, the question of the origin of these two populations has been vague, although all explanations favor migration processes for the individual cluster members. Aims. This work revisits the S-cluster and its dusty members orbiting the supermassive black hole SgrA* on bound Keplerian orbits from a kinematic perspective. The aim is to explore the Keplerian parameters for patterns that might imply a nonrandom distribution of the sample. Additionally, various analytical aspects are considered to address the nature of the dusty sources. Methods. Based on the photometric analysis, we estimated the individual H−K and K−L colors for the source sample and compared the results to known cluster members. The classification revealed a noticeable contrast between the S-stars and the dusty sources. To fit the flux-density distribution, we utilized the radiative transfer code HYPERION and implemented a young stellar object Class I model. We obtained the position angle from the Keplerian fit results; additionally, we analyzed the distribution of the inclinations and the longitudes of the ascending node. Results. The colors of the dusty sources suggest a stellar nature consistent with the spectral energy distribution in the near and midinfrared domains. Furthermore, the evaporation timescales of dusty and gaseous clumps in the vicinity of SgrA* are much shorter ( 2yr) than the epochs covered by the observations (≈15yr). In addition to the strong evidence for the stellar classification of the D-sources, we also find a clear disk-like pattern following the arrangements of S-stars proposed in the literature. Furthermore, we find a global intrinsic inclination for all dusty sources of 60 ± 20◦, implying a common formation process. Conclusions. The pattern of the dusty sources manifested in the distribution of the position angles, inclinations, and longitudes of the ascending node strongly suggests two different scenarios: the main-sequence stars and the dusty stellar S-cluster sources share a common formation history or migrated with a similar formation channel in the vicinity of SgrA*. Alternatively, the gravitational influence of SgrA* in combination with a massive perturber, such as a putative intermediate mass black hole in the IRS 13 cluster, forces the dusty objects and S-stars to follow a particular orbital arrangement. Key words. stars: black holes– stars: formation– Galaxy: center– galaxies: star formation
The binding of cosmological structures by massless topological defects
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
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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.
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Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
Wereport the study of a huge optical intraday flare on 2021 November 12 at 2 a.m. UT in the blazar OJ287. In the binary black hole model, it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifrequency observing campaign was set up to search for such a signature of the impact based on a prediction made 8 yr earlier. The first I-band results of the flare have already been reported by Kishore et al. (2024). Here we combine these data with our monitoring in the R-band. There is a big change in the R–I spectral index by 1.0 ±0.1 between the normal background and the flare, suggesting a new component of radiation. The polarization variation during the rise of the flare suggests the same. The limits on the source size place it most reasonably in the jet of the secondary BH. We then ask why we have not seen this phenomenon before. We show that OJ287 was never before observed with sufficient sensitivity on the night when the flare should have happened according to the binary model. We also study the probability that this flare is just an oversized example of intraday variability using the Krakow data set of intense monitoring between 2015 and 2023. We find that the occurrence of a flare of this size and rapidity is unlikely. In machine-readable Tables 1 and 2, we give the full orbit-linked historical light curve of OJ287 as well as the dense monitoring sample of Krakow.
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Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
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Direct Seeded Rice - Climate Smart AgricultureInternational Food Policy Research Institute- South Asia Office
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CLASS 12th CHEMISTRY SOLID STATE ppt (Animated)
Description:
Dive into the fascinating realm of solid-state physics with our meticulously crafted online PowerPoint presentation. This immersive educational resource offers a comprehensive exploration of the fundamental concepts, theories, and applications within the realm of solid-state physics.
From crystalline structures to semiconductor devices, this presentation delves into the intricate principles governing the behavior of solids, providing clear explanations and illustrative examples to enhance understanding. Whether you're a student delving into the subject for the first time or a seasoned researcher seeking to deepen your knowledge, our presentation offers valuable insights and in-depth analyses to cater to various levels of expertise.
Key topics covered include:
Crystal Structures: Unravel the mysteries of crystalline arrangements and their significance in determining material properties.
Band Theory: Explore the electronic band structure of solids and understand how it influences their conductive properties.
Semiconductor Physics: Delve into the behavior of semiconductors, including doping, carrier transport, and device applications.
Magnetic Properties: Investigate the magnetic behavior of solids, including ferromagnetism, antiferromagnetism, and ferrimagnetism.
Optical Properties: Examine the interaction of light with solids, including absorption, reflection, and transmission phenomena.
With visually engaging slides, informative content, and interactive elements, our online PowerPoint presentation serves as a valuable resource for students, educators, and enthusiasts alike, facilitating a deeper understanding of the captivating world of solid-state physics. Explore the intricacies of solid-state materials and unlock the secrets behind their remarkable properties with our comprehensive presentation.
MICROBIAL INTERACTION PPT/ MICROBIAL INTERACTION AND THEIR TYPES // PLANT MIC...
MICROBIAL INTERACTION PPT/ MICROBIAL INTERACTION AND THEIR TYPES // PLANT MIC...ABHISHEK SONI NIMT INSTITUTE OF MEDICAL AND PARAMEDCIAL SCIENCES , GOVT PG COLLEGE NOIDA
Microbial interaction
Microorganisms interacts with each other and can be physically associated with another organisms in a variety of ways.
One organism can be located on the surface of another organism as an ectobiont or located within another organism as endobiont.
Microbial interaction may be positive such as mutualism, proto-cooperation, commensalism or may be negative such as parasitism, predation or competition
Types of microbial interaction
Positive interaction: mutualism, proto-cooperation, commensalism
Negative interaction: Ammensalism (antagonism), parasitism, predation, competition
I. Mutualism:
It is defined as the relationship in which each organism in interaction gets benefits from association. It is an obligatory relationship in which mutualist and host are metabolically dependent on each other.
Mutualistic relationship is very specific where one member of association cannot be replaced by another species.
Mutualism require close physical contact between interacting organisms.
Relationship of mutualism allows organisms to exist in habitat that could not occupied by either species alone.
Mutualistic relationship between organisms allows them to act as a single organism.
Examples of mutualism:
i. Lichens:
Lichens are excellent example of mutualism.
They are the association of specific fungi and certain genus of algae. In lichen, fungal partner is called mycobiont and algal partner is called
II. Syntrophism:
It is an association in which the growth of one organism either depends on or improved by the substrate provided by another organism.
In syntrophism both organism in association gets benefits.
Compound A
Utilized by population 1
Compound B
Utilized by population 2
Compound C
utilized by both Population 1+2
Products
In this theoretical example of syntrophism, population 1 is able to utilize and metabolize compound A, forming compound B but cannot metabolize beyond compound B without co-operation of population 2. Population 2is unable to utilize compound A but it can metabolize compound B forming compound C. Then both population 1 and 2 are able to carry out metabolic reaction which leads to formation of end product that neither population could produce alone.
Examples of syntrophism:
i. Methanogenic ecosystem in sludge digester
Methane produced by methanogenic bacteria depends upon interspecies hydrogen transfer by other fermentative bacteria.
Anaerobic fermentative bacteria generate CO2 and H2 utilizing carbohydrates which is then utilized by methanogenic bacteria (Methanobacter) to produce methane.
ii. Lactobacillus arobinosus and Enterococcus faecalis:
In the minimal media, Lactobacillus arobinosus and Enterococcus faecalis are able to grow together but not alone.
The synergistic relationship between E. faecalis and L. arobinosus occurs in which E. faecalis require folic acid
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The Moon, Our Natural Satellite
- 1. The Moon, Our Natural Satellite By Amita Vadlamudi
- 2. TheMoon The most revered object In the sky
- 3. Introduction • The Moon appears as a beautiful, ethereal object in the sky. In reality, it is much like the earth with rocks and soil, its brilliance caused by the reflecting sun. • The word moon comes from the old Germanic language meaning time and measure. In Latin, it is referred to as Luna. Although many other moons orbiting other planets have been discovered and given unique names, our moon remains to be simply referred to as the Moon – with a capital letter.
- 4. Companion to the Earth • The Moon orbits around the Earth and rotates around its axis once in approximately 27 days. Changes in tides occur due to its magnetic pull. It also causes the Earth’s precession, moderating its axial tilt. • The Moon located at a distance of 384,400 km from the Earth is a bit more than one-fourth the size of Earth with a radius of 1,737.5 km.
- 5. Origins • Leading giant-Impact theory suggests that the Moon’s formation was a result of a collision between the Earth and Theia—a planet that is roughly the size of Mars. Believed to have formed 4.5 billion years ago, its timeline is much- debated. Recently scientists discovered that the Moon might be 100 million years older, formed just after 50 million years of the Solar System.
- 6. Geology • The Moon has a relatively smaller solid iron core, enclosed in a partly melted iron shell. The mantle lies between the molten layer and the crust. Its composition is similar to the Earth. • The surface is rocky and cratered due to impacts. Its volcanoes can be considered extinct. Another notable development has been the discovery of traces of water on the lunar surface.
- 7. The Weather • The atmosphere, an exosphere to be precise, is thin with no air pressure and a weak magnetic field. Temperatures range between -280F at nighttime and +260F at daytime. • The Moon experiences same season all year long, having a tilt of only 1.5 degrees.
- 8. Visitors to the Moon • Humans had set their sights on Moon for a long time. The first to enter the Moon space was an unmanned spacecraft launched by the Soviet Union in 1959. The first unmanned landing occurred in 1966. Six manned landings had occurred between the years of 1969 and 1972 conducted by the United States. The first person to walk on the Moon was the American astronaut Neil Armstrong, part of a three man crew that included Buzz Aldrin and Michael Collins.
- 9. About the Author • After retiring from a 30 year career in Information Technology, Amita Vadlamudi now pursues publishing interests. Researching into and writing about various topics in Astronomy and Geography is of particular interest to Amita Vadlamudi.