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This quiz consists of 5 multiple choice and 5 short answer questions through Chapters 21-25.

Multiple Choice Questions

1. In the Manhattan Project, how much uranium did scientists believe was needed for a critical mass?
(a) 510 pounds.
(b) 380 pounds.
(c) 440 pounds.
(d) 630 pounds.

2. How many gama rays were the firefighters of Chernobyl exposed to?
(a) 500 trillion.
(b) 750 billion.
(c) About a quintillion.
(d) Over a quadrillion.

3. How much more energy is typically released by a nuclear chain reaction than an equal weight of TNT?
(a) 500,000 times.
(b) 15 million times.
(c) 20 million times.
(d) 10,000 times.

4. What is the Earth's atmosphere?
(a) 96% nitrogen and oxygen.
(b) 97% nitrogen and oxygen.
(c) 98% nitrogen and oxygen.
(d) 99% nitrogen and oxygen.

5. In Chapter 4, how many people could have been killed by the anthrax spores mailed to news organizations?
(a) 575,000.
(b) Hundreds of thousands.
(c) Millions.
(d) 350,000.

Short Answer Questions

1. In Chapter 17, how many shuttles had been lost in more than 100 missions?

2. How many deaths did the United Nations estimate around the world were caused by radiation from Chernobyl?

3. What percent of the energy of gasoline is carried by the best rechargeable batteries?

4. How fast is the Moon moving in respect to Earth?

5. In 1974 how much energy did the average refrigerator in the U.S. use?

(see the answer key)

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