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This quiz consists of 5 multiple choice and 5 short answer questions through Chapters 16-20.

Multiple Choice Questions

1. When did the U.S. and Russia sign a treaty where they promised to reduce their stockpile of nuclear weapons to less than 6,000 each?
(a) 1992.
(b) 1991.
(c) 1996.
(d) 1998.

2. How many watts do humans emit?
(a) About 50.
(b) 60.
(c) Around 30.
(d) 25.

3. How how long could the lasers mentioned in Chapter 14 deliver a power of 500 trillion watts?
(a) 5 nanoseconds.
(b) 1 nanosecond.
(c) 4 nanoseconds.
(d) 6 nanoseconds.

4. How long do the carcinogens from coal-buring plants last in the ground?
(a) 100 years.
(b) 500 years.
(c) 50 years.
(d) Forever.

5. What type of moderator is used to slow neutrons in a reactor in a power plant in the U.S.?
(a) Graphite.
(b) Ordinary water.
(c) Beryllium.
(d) Heavy water.

Short Answer Questions

1. How many astronauts were killed in the space shuttle Columbia explosion?

2. How many times the energy of uranium and plutonium bombs can be released by hydrogen bombs?

3. In Part IV, how long did it take to go between Moscow and New York City by satellite?

4. When were high sea surface temperatures in the Caribbean detected by infrared satellites in Chapter 18?

5. When was it discovered that the amount of ozone formed in Antarctica was decreasing yearly?

(see the answer key)

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