Question: Choose your answer.

A water company uses lab tests on the water supply before sending the water through pipes to people's homes. How do these lab tests help people?

OPTIONS:
- by adding minerals and nutrients to the water
- by checking the water to make sure it is safe to drink
- by filtering chemicals and organisms out of the water
- by stopping harmful substances from entering the water
My Answer: by checking the water to make sure it is safe to drink

Question: Choose your answer.

At a weightlifting competition, two competitors lifted the same weight to the same height. The second competitor accomplished the lift 2 seconds faster than the first competitor. This demonstrated that the second competitor had more

OPTIONS:
- energy than the first.
- inertia than the first.
- power than the first.
- work than the first.
My Answer: power than the first.

Question: Choose your answer.

A student examines a new watch design. The watch has a small solar cell on its face. The main function of the solar cell is to

OPTIONS:
- reduce the cost of the watch.
- provide an energy source for the watch.
- make the watch more attractive.
- stop the watch from speeding up.
My Answer: provide an energy source for the watch.

Question: Choose your answer.

Jake's cats eat food from a can. The cats come running into the kitchen when they hear the electric can opener. Now, each time Jake's mother opens a can of corn, the cats come running. This is an example of

OPTIONS:
- learned behavior
- correct behavior
- instinct
- migration
My Answer:
learned behavior