7th Gr M3L3 Law of Conservation of Energy Test

Front

What is the Law of Conservation of Energy?

Back

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What happens to potential energy as an object swings from its highest point to its lowest point?

Back

As an object swings down, its potential energy decreases while its kinetic energy increases.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, such as height above the ground.

Front

How does friction affect energy transformation?

Back

Friction converts some mechanical energy into thermal energy, causing energy loss in the system.

Front

What is an example of energy transformation in a bicycle when braking?

Back

When braking, the mechanical energy of the moving bicycle is transformed into thermal energy due to friction.

Front

What type of energy is produced when you rub your hands together?

Back

Rubbing your hands together converts kinetic energy into thermal energy, warming your hands.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter, often felt as heat.

Front

Which materials can reduce friction?

Back

Materials like grease, oil, and graphite can reduce friction, while cotton does not.

Front

What is an example of potential energy?

Back

An example of potential energy is a rock held at the top of a hill, which has energy due to its height.