Task 9: Mass Extinctions Introduction: In this report I will talk to you about the 5 mass extinctions that have happened on earth over the past 434 million years. I will also talk to you about the effects of the current mass extinction. The last things i will show is a list of 10 recently extinct species and 10 endangered species. Number 1: The Ordovician Silurian Extinction This extinction happened about 439 million years ago‚ because of a drop in sea levels as glaciers formed. An ice age has been
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Scientists have been continuously presented with questions regarding the mystery that is life. What is life‚ and how did it get started? Their responses to these questions has varied over the years as advances in technology have led to new evidence being brought in from a ranging variety of fields. In the summer of 1993‚ J. William Schopf‚ a paleobiologist reportedly found fossilized imprints of microbial communities between layers of rock that were 3.5 billion years old. This‚ along with other
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Example problems involving collisions 1) On a horizontal frictionless surface a puck of mass m initially at speed u collides head-on (without rotation) with a stationary puck of mass M. Find the velocities of both puck after the collision if: i) the collision is fully elastic ii) the collision if fully inelastic. i) momentum: kinetic energy: mu = mv+MV (+ve in direction of initial u) 1 /2 m u2 = 1/2 m v2 + 1/2 M V2 2 eqns in 2 unknowns: V = (u - v) m/M substitute in K eqn: u2 = v2 + (M/m) V2 =
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1.|So far as we know‚ the first person who claimed that natural phenomena could be described by mathematics was| |A) Copernicus. B) Pythagoras. C) Aristotle. D) Ptolemy.| |Ans: BSection: Chapter 2‚ Introduction| 2.|The ancient Greek thinker Pythagoras held the view that| A)|triangles do not exist.| B)|natural phenomena are wonderful to watch but cannot be described by mathematics.| C)|the Sun is at the center of the planetary system.| D)|natural phenomena can be described
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then it is organized every several years. 1977 was formed Ciurlionis quartet. In 1990 the quartet was awarded the Lithuanian National Premium. 1975 the Crimean astrophysicist Nikolaj Cernych discovered a new 8 km diameter asteroid and called it the Ciurlionis asteroid. It orbits round the Sun in approximately four years (average distance from the Sun: 384 mln. km). 1975-76 m. on occasion of M.K.Ciurlionis’ 100-year birth anniversary‚ 26 masters of folk art built a range of 22 sculptures in
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The Space Age February 2013‚ asteroid 2012 DA14 is plummeting towards Earth. My science class at Crestwood Junior High was chatting about this amazing phenomenon. Most of the class is just counting down the minutes until the bell rings. But I had just started my journey through the unknown‚ that is still going on today. Wanting to learn all I can about spacecrafts‚ planets‚ asteroids‚ and the many other things around us. From some of the first spacecrafts‚ all the way to cool technologies that
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: "My husband snores. All men must snore" commits which of these fallacies. Student Answer: CORRECT Hasty generalization Appeal to pity False Cause Post hoc ergo propter hoc 9. Question : "After the asteroid hit the earth‚ there was a tornado. So the
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Sir Alexander Fleming‚ FRSE‚ FRS‚ FRCS(Eng) (6 August 1881 – 11 March 1955) was a Scottish biologist‚ pharmacologist and botanist. He wrote many articles on bacteriology‚ immunology‚ and chemotherapy. His best-known discoveries are the enzyme lysozyme in 1923 and the antibiotic substance penicillin from the mould Penicillium notatum in 1928‚ for which he shared the Nobel Prize in Physiology or Medicine in 1945 with Howard Florey and Ernst Boris Chain.[1] In 1999‚ Time magazine named Fleming one
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astronauts exploring and getting ready to head home. Then mission control stated clearly that the trip would be fatal and dangerous due to asteroids blocking the way‚ but Neil’s ego led him to believe that his piloting skills could let him maneuver across without getting hit (he was also homesick and was impatient). But due to his flaws‚ the ship got hit by an asteroid‚ which leads Neil to see his friends die to his blunder. Secondly‚ the main idea for my story is that we should not be overconfident
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Extinction is the end of an organism or group of taxa. Extinctions occur when a species becomes unfit for survival in its natural habitat usually to be replaced by another‚ better-suited species. An organism becomes ill-suited for survival because its environment is changed or because its relationship to other organisms is altered as stated from Credo Reference. The moment of extinction is generally considered to be the death of the last individual of that particular species. Mass extinctions‚ however
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