Unit 11 Practice Quiz

Unit 11 Practice Quiz - 1. Which of the following is not...

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1. Which of the following is not part of the evidence that the odd layer marking the extinction of the dinosaurs was caused by a large meteorite impact? A. High concentrations of silica found in the layer. B. The common occurrence in the layer of otherwise-rare “shocked” quartz and other mineral types known to be formed only by quickly applied high pressures. C. Abundant soot found in the layer. D. High concentrations of iridium found in the layer. E. Large torn-up rock blocks from a tsunami (giant wave), found in the layer near the Caribbean Sea. We have seen several times that silica is very common, so its presence in a layer would not indicate much of anything. Features really observed in the layer that are associated with meteorites but not common elsewhere in rocks include shocked quartz from the impact, soot from wildfires, iridium from the meteorite, and a giant-wave deposit because the meteorite hit water as well as land at the edge of the Yucatan Peninsula. Points Earned: 1/1 Correct Answer: A Your Response: A 2. There are many large mammals on Earth today. This is because: A. Dinosaurs in hibernation were killed by acid rain, which didn't hurt things that could run away. B.
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Unit 11 Practice Quiz - 1. Which of the following is not...

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