|Name: _________________________||Period: ___________________|
This test consists of 5 short answer questions, 10 short essay questions, and 1 (of 3) essay topics.
Short Answer Questions
1. In Chapter 30, the author notes that, in the past, some larger species became extinct because:
2. A Swedish DNA study concludes that all modern humans descended from how many people in Africa?
3. Gregor Mendel, who conducted research on transmittal of traits in pea plants, was a scientist and a:
4. The oldest record of life found so far consists of fossilized traces of microbes discovered where?
5. Humans share 98.4 percent of their DNA with:
Short Essay Questions
1. What is cytoplasm?
2. How many elements occur naturally on Earth? How many are central to life?
3. What does the author say about radioactive waste being dumped into oceans?
4. Describe the Indonesian volcanic eruption of 1815.
5. What did scientists find in the Burgess Shale of British Columbia?
6. How does DNA replicate itself?
7. What is Carl Linnaeus known for?
8. How do ice ages begin?
9. How are scientific discoveries challenging the understanding of human evolution?
10. What are cyanobacteria? How did they affect the environment billions of years ago?
Write an essay for ONE of the following topics:
Essay Topic 1
Explain how lead, despite being toxic to humans, found its way into gasoline. Why was safety ignored? Who fought to remove lead from gasoline? Describe this individual, his campaign, and the resistance he met. What was the outcome of his campaign?
Essay Topic 2
What are quarks? Describe them in detail, including their function, composition, colors, and "flavors."
Essay Topic 3
Explain supernovas. What exactly are they? Describe the mechanism behind them. How long do they last? What contributions do supernovas make to the universe?
This section contains 694 words
(approx. 3 pages at 300 words per page)