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This quiz consists of 5 multiple choice and 5 short answer questions through Chapters 6-10.

Multiple Choice Questions

1. How much of a half-life does carbon-14 have?
(a) 2,840 years.
(b) 5,730 years.
(c) 3,910 years.
(d) 4,592 years.

2. How long does the radioactivity of potassium-40 last?
(a) 2 million years.
(b) A billion years.
(c) 100,000 years.
(d) 9 trillion years.

3. In Chapter 8, approximately what percent of people died from cancer of unknown causes?
(a) 25.
(b) 15.
(c) 30.
(d) 20.

4. When did North Korea have a nuclear weapon test in Chapter 1?
(a) October 9, 2006.
(b) March 3, 2005.
(c) September 7, 2004.
(d) February 20, 2007.

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

Short Answer Questions

1. When did the United States place an embargo on Japanese oil imports after they invaded China?

2. How many watts per square food does overhead sunlight approximately deliver to the ground?

3. When was the last date that anthrax letters were sent in 2001?

4. When did North Korea test its first atomic bomb?

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

(see the answer key)

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