EXERCISES, LESSON 2
INSTRUCTIONS. The following exercises are to be answered by marking the response
that best answers the question or best completes the incomplete statement or by writing
the answer in the space provided.
After you have completed all the exercises, turn to the solutions at the end of the
lesson and check your answers. For each exercise answered incorrectly, reread the
material referenced after the solution.
An alpha particle has a low velocity, weak penetrating power, causes no
disruption to the body's ion balance, and can be stopped by ______________ or
A beta particle corresponds to an electron of an atom, carries a negative charge,
is faster and slightly more penetrating than an alpha particle, and can be stopped
A beta particle is unlikely to cause damage unless taken into the body through
_________________, ________________________, or __________________.
Gamma rays are waves of energy with the speed of ___________. Gamma rays
have a high penetration power into the body and can cause body damage
leading to ____________________ .
Two basic sources of natural background radiation in the environment are
cosmic radiation and ____________________________.
Radioactive materials in the earth's crust are examples of ______________