Radiation Sources & Doses and Geiger Counters

Which type of radiation increases with elevation?

• Cosmic radiation

• Terrestrial radiation

• Man-made radiation

• Background radiation

Which radioactive gases are created from the decay of naturally occurring elements?

• Helium and Radon

• Radon and Thoron

• Argon and Neon

• Xenon and Krypton

Tags

NGSS.HS-PS1-8

What percentage of the average American's radiation dose comes from medical procedures?

• 48 percent

• 30 percent

• 55 percent

• 25 percent

What is the main source of background radiation?

• Nuclear power plants

• Naturally occurring minerals

• Industrial waste

• Medical imaging devices

Tags

NGSS.HS-PS1-8

Which radioactive isotope is commonly found in the human body?

• Carbon-14

• Potassium-40

• Cesium-137

• Uranium-235

Tags

NGSS.HS-PS1-8

What is the primary function of a Geiger counter?

• Measuring temperature

• Detecting ionizing radiation

• Calculating speed

• Recording sound

Geiger counters can detect all of the following types of radiation except:

• Alpha particles (2 protons and 2 neutrons joined together)

• Beta particles (electrons traveling at high speeds)

• Gamma radiation (electromagnetic rays with very high energy)

• Microwave radiation (electromagnetic rays with long wavelengths)

What happens inside the Geiger counter when radiation is detected?

• Gas ionization

• Water condensation

• Light emission

• Sound production

Tags

NGSS.HS-PS3-5

What is ionization, as it relates to Geiger counters?

• Conversion of atoms to ions as a result of a loss of electrons

• Freezing of water molecules

• Heating of a metal

• Splitting of light

What does the clicking sound from a Geiger counter indicate?

• Device malfunction

• Temperature change

• Battery low

• Detection of radiation