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

Multiple Choice Questions

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

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

3. How long were the steel columns of the World Trade Center designed to maintain their strength during an ordinary fire?
(a) 6 hours.
(b) 2 to 3 hours.
(c) 1 hour.
(d) 4 to 5 hours.

4. When did the U.S. pass a law mandating the use of 7.5 billion gallons of ethanol by 2012?
(a) 2004.
(b) 2006.
(c) 2007.
(d) 2005.

5. How much more natural radioactivity are people living in Denver exposed to than someone in New York City?
(a) 0.5 rem.
(b) 0.1 rem.
(c) 0.2 rem.
(d) 0.8 rem.

Short Answer Questions

1. In Chapter 23, how many nations had ratified the Kyoto Protocol?

2. When was gasoline a key component of the Molotov cocktails used in Spain?

3. When did a pebble bed reactor have to be shut down in Germany?

4. When did President Reagan announced that he had reduced the total yield of the U.S. nuclear arsenal?

5. When was Iraq attempting to develop nuclear weapons?

(see the answer key)

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