Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
|
|
|
1.
|
One type of
radioactive device that indicates the intensity of radiation with a clicking sound that increases in
frequency as more radiation is present is a(n) ____. a. | bubble
chamber | c. | electroscope | b. | cloud chamber | d. | Geiger counter | | | | |
|
|
|
2.
|
When the
strong force is not sufficient to hold unstable nuclei together permanently, ____. a. | nuclear fusion
occurs | c. | the nuclei
decay | b. | a solid becomes a liquid | d. | carbon-12 changes into carbon-14 | | | | |
|
|
|
3.
|
An
instrument that detects radiation by means of a superheated liquid is a ____. a. | bubble
chamber | c. | Geiger
counter | b. | cloud chamber | d. | photographic plate | | | | |
|
|
|
4.
|
The
discovery of radioactivity by Henri Bequerel involved a ____. a. | bubble
chamber | c. | Geiger
counter | b. | chain reaction | d. | photographic plate | | | | |
|
|
|
5.
|
The process
by which nuclei having low masses are united to form nuclei with larger masses is
____. a. | a chain
reaction | c. | nuclear
fission | b. | a chemical reaction | d. | nuclear fusion | | | | |
|
|
|
6.
|
Radioactive
tracers are useful in ____. a. | calculating the ages of fossils | c. | fueling nuclear reactions | b. | determining medical
problems | d. | treating brain
tumors | | | | |
|
|
|
7.
|
Both a
fusion reaction and a fission reaction ____. a. | causes chain reactions | c. | take place at room temperature | b. | produce
energy | d. | use hydrogen as a
fuel | | | | |
|
|
|
8.
|
Neutrons
released in a fission reaction can strike other nuclei and cause ____. a. | a chain
reaction | c. | fusion
reactions | b. | an electron avalanche | d. | radioactive decay | | | | |
|
|
|
9.
|
If a source
of radiation is placed near ____ cells, atoms in the cells can be ionized and can die or stop
growing. a. | thyroid | c. | heart | b. | fat | d. | cancer | | | | |
|
|
|
10.
|
When the
____ is not large enough to hold a nucleus together tightly, the nucleus can become
radioactive. a. | electric
force | c. | tracer | b. | strong force | d. | isotope | | | | |
|