PS-Energy Transfer Final Review

Which of the following wave types has the highest frequency? (use your reference sheet!)

• visible light
• ultaviolet
• x-rays
• radio waves

The materials in the start of a chemical reaction are called

• reactants
• products
• catalysts

The energy of motion is called

• kinetic
• potential
• thermal

Why are beta particles able to penetrate objects better than alpha particles are?

• because beta particles are larger than alpha particles
• because beta particles are smaller than alpha particles
• because beta particles are negatively charged, while alpha particles are neutral
• because beta particles travel in a straight line, while alpha particles travel in waves

Gamma waves can be stopped by

• a piece of paper
• a piece of wood
• several feet of lead, concrete

Name the MOST penetrating type of radiation.

• alpha
• beta
• gamma
• lambda

The three types of nuclear radiation in order of INCREASING penetrating power are

• alpha, beta, gamma
• alpha, gamma, beta
• beta, alpha, gamma
• gamma, alpha, beta

When the temperature of matter increases the particles...

• speed up and move closer
• speed up and move farther apart
• slow down and move closer together
• slow down and move farther apart

The half-life of a radioactive isotope is the time required for one-half of the initial mass to decay into a different element. The radioactive decay of iodine is shown in the graph.  What is the half-life of radioactive iodine?

• 8 days
• 16 days
• 32 days
• 48 days

Has the symbol

• Alpha
• Beta
• Gamma