7th Grade Science 2nd 9 Weeks Review

Front

What is one disadvantage of using coal to produce electricity?

Back

Coal is not environmentally friendly.

Front

Which position has the least potential energy?

Back

Position B has the least potential energy.

Front

What is the formula for average speed?

Back

Average speed = Total distance / Total time.

Front

At which point does a roller coaster car have the greatest kinetic energy?

Back

The roller coaster car has the greatest kinetic energy at point 5.

Front

Which position has the greatest kinetic energy?

Back

Position D has the greatest kinetic energy.

Front

Define kinetic energy.

Back

Kinetic energy is the energy an object possesses due to its motion.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state.

Front

How does height affect potential energy?

Back

Potential energy increases with height; the higher an object is, the more potential energy it has.

Front

What is the relationship between kinetic energy and speed?

Back

Kinetic energy increases with the square of the speed; if speed doubles, kinetic energy increases by four times.

Front

What is the law of conservation of energy?

Back

Energy cannot be created or destroyed; it can only be transformed from one form to another.