UNIT 7: Test Answers

Anna drew a diagram to compare the strong and weak force.

Scientists use a substance called Iodine-131 to treat cancer. As Iodine-131 undergoes radioactive decay and emits beta particles, it kill cancer cells.

Which statement explains how planets move in orbit as supported by Newton’s first law of motion?

At which location would an object’s weight be the greatest?

What part of an atom is involved in a chemical reaction?

A target is shielded from a radioactive sample by a sheet of metal. What kind of radiation can pass through the sheet of metal and hit the target?

Which force keeps molecules in a fluid together?

Jared is experimenting with a force that is attractive only and the weakest of the fundamental forces. He is experimenting with which force?

When two objects are near each other, how would increasing one object’s mass affect it?

An isotope undergoes radioactive decay by emitting radiation that has no mass. What other characteristic does the radiation have?

Look at the diagram of the moon and three different paths that it could take.

Examine the nuclear reaction: . Why is this classified as a nuclear reaction rather than a chemical reaction?

Which are advantages of using nuclear reactors to generate electricity? Select 3 options.

Which is a force that attracts any two pieces of matter in the universe?

Carla sees an equation that models a nuclear change.

How many fundamental forces exist in nature?

The nuclear equation is incomplete.

Which statement explains how gravity and inertia work together?

While a certain isotope decays, it emits photons. What kind of decay is happening?

Which would most likely cause a decrease in the rate of energy production in a fusion nuclear reactor?