Lesson 6

What is nonionizing radiation?

• Radiation that can remove electrons from atoms

• Radiation that can move atoms in a molecule but not remove electrons

• Radiation that can break chemical bonds

• Radiation that can damage DNA

What is the effect of ionizing radiation on DNA?

• Induces low currents

• Excites electrons

• Damages DNA

• Causes photochemical effects

Which type of radiation is associated with medical X-rays?

• Nonionizing radiation

• Ionizing radiation

• Sound waves

• Radio frequency energy

What type of cancer was associated with the practice of mouth tipping?

• Lung cancer

• Bone cancer

• Skin cancer

• Liver cancer

What is the atomic number of carbon?

• 6

• 8

• 12

• 14

What is the atomic number of uranium?

• 90

• 91

• 92

• 93

What is the main hazard of alpha particles inside the body?

• They are harmless

• They can damage sensitive living tissue

• They cause no ionization

• They are easily stopped by skin

What is the main reason gamma rays are a radiation hazard for the entire body?

• They are visible light

• They can cause ionizations that damage tissue and DNA

• They are stopped by skin

• They have no penetrating power

What are gamma rays?

• Particles with mass and energy

• Weightless packets of energy called photons

• Heavy particles with no energy

• Visible light waves

What is measured by the term "Exposure" in radiation?

• The amount of radiation absorbed by a person.

• The amount of radiation traveling through the air.

• The amount of ionizing radiation released by a material.

• The measure of dose deposited in body tissue.