Question

all of the following are used to detect radioactivity except
select one:
a. cloud chamber
b. film badge
c. nuclear reactor
d. geiger counter

which statement best describes how a geiger counter works?

select one:
a. water vapor condenses along a path traveled by ionizing radiation.
b. particles ionized by radiation cause black streaks to appear on sensitive photographic paper
c. radioactive particles ionize argon gas in a tube and the resulting electric current is amplified and heard as a clicking sound.
d. a material sensitive to radioactive emissions glows when mixed with a radioactive substance.

Explanation:

For the first question: Cloud chambers, film badges, and Geiger counters are all tools designed to detect radioactivity. A nuclear reactor is a device that generates energy through nuclear fission, not a radiation detection tool.
For the second question: A Geiger counter uses a tube filled with argon gas. When radioactive particles enter the tube, they ionize the argon gas, creating an electric current that is amplified and produces an audible clicking sound. Option a describes a cloud chamber, option b describes a film badge, and option d describes a scintillation detector.

Answer:

1. c. nuclear reactor
2. c. Radioactive particles ionize argon gas in a tube and the resulting electric current is amplified and heard as a clicking sound.