HMH Grade 4 Unit 2: Energy

Front

What is Solar Energy?

Back

Solar energy is the energy that comes from the sun, which can be converted into other forms of energy, such as electrical energy.

Front

What does a solar cell do?

Back

A solar cell converts light into electrical energy.

Front

What happens when two objects collide?

Back

When two objects collide, they can change direction and speed.

Front

Why does the motion of objects change when they collide?

Back

The motion changes because energy is transferred from one object to the other.

Front

What is Electrical Energy?

Back

Electrical energy is the energy caused by the movement of electrons.

Front

What is Mechanical Energy?

Back

Mechanical energy is the energy that an object has due to its motion or position.

Front

What is a Power Plant?

Back

A power plant is a facility that generates electrical energy from various sources, such as fossil fuels, nuclear, or renewable sources.

Front

What is the relationship between Solar Energy and Electrical Energy?

Back

Solar energy can be converted into electrical energy using solar cells.

Front

What is an example of energy transfer?

Back

When a moving ball hits a stationary ball, energy is transferred from the moving ball to the stationary ball.

Front

What is the role of a dam in energy production?

Back

A dam stores water and uses its flow to generate electrical energy.