Science Review

Which two things must be known to measure speed?

• speed and distance

• time and distance

All objects are made of charged particles.

• True

• False

A knife is an example of a wedge.

• True

• False

Materials that do not allow current to flow easily are called conductors.

• True

• False

In a tug-of-war game, when both sides pull equally on the rope, the forces are unbalanced.

• True

• False

Identify the motion as shown by the symbols below.

• straight line

• back and forth

• zigzag

• round and round

Stored energy that is ready to be used is called ____________________ energy.

• potential

• space

• motion

• current

• location

Distance is the amount of ____________________ between two objects or places.

• space

• potential

• motion

• location

• current

Which of the following is NOT a simple machine?

• lever

• pulley

• screw

• can opener

A switch allows you to control the flow of ____________________ .

• current

• space

• motion

• location

• potential