Please write 1 complete paragraph comparing my scientific theory of why the dinosaurs became extinct compared to the impact theory of why the dinos. became extinct.
My scientific theory of why the dinos became extinct is because of possible changes in the oceans.
So please use my scientific theory and write 1 paragraph comparing it to the impact theory k? Tanks your really helpin me out!!! Remember therres 10 points on the line!!! :)
2006-10-25
15:46:30
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8 answers
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asked by
C.J. W
3
in
Education & Reference
➔ Other - Education
THE IMPACT THEORY -- (ALVAREZ HYPOTHESIS)
One of the great mysteries in science is the extinction of the Dinosaurs at the end of the Mesozoic Era. Scientists have always debated what event or events caused the demise of the Dinosaurs. At the beginning of the Mesozoic Era Dinosaurs started to appear and dominated all forms of life. Fossil records shown in the lower strata of rock contains the earliest and most primitive species of Dinosaur, and the upper strata contains the newer species. But then at the Cretaceous-Tertiary, the Dinosaurs are nowhere to be found. What happened to the Dinosaurs?
This where the Alvarez hypothesis comes into effect. In the 1980's the father-son team of Luis and Walter Alvarez discovered a layer of Iridium at the Cretaceous-Tertiary boundary. Iridium is rare on Earth, but abundant in meteorites. The Alvarezs' suggested that a huge asteroid or comet, perhaps miles in diameter, hit the Earth at that time. The result of such an impact would be an eno
2006-10-25
17:29:42 ·
update #1