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This quiz consists of 5 multiple choice and 5 short answer questions through Part 5, Chapter 24.

Multiple Choice Questions

1. When did the last supervolcano erupt on Earth?
(a) 1,100 years ago.
(b) 74,000 years ago.
(c) 23,000 years ago.
(d) 9,000 years ago.

2. Vesto Slipher's work at the Lowell Observatory in Arizona led him to discover that distant stars are moving away from us, with the farthest stars moving the fastest, suggesting that the universe is:
(a) Shrinking.
(b) Oscillating.
(c) Stable.
(d) Expanding.

3. Scientists now believe that life began on Earth how long ago?
(a) 5.75 million years.
(b) 7.35 trillion years.
(c) 6.25 thousand years.
(d) 3.85 billion years.

4. Bacteria take nitrogen from the air and form it into what?
(a) Amino acids.
(b) Nitric oxide.
(c) Fluoride.
(d) Water.

5. When radiation was first discovered, people thought it must have:
(a) Healthful properties.
(b) High toxicity.
(c) Been caused by thunderstorms.
(d) An extraterrestrial origin.

Short Answer Questions

1. Many scientists suspect that Pluto is just a comet of the:

2. The author mentions the case of bacteria surviving for two years in a sealed camera lens where?

3. The oldest record of life found so far consists of fossilized traces of microbes discovered where?

4. Mitochondria convert food and oxygen into ATP, which is what?

5. What are eukarya?

(see the answer key)

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