How Do We Use Energy?

What is energy?

• anything that comes from the sun

• something that can cause matter to move or change

• a tool you use at home

Answer explanation

energy [EN•er•jee] something that can cause matter to move or change.

Energy and engine begin with the same sounds. An engine makes a car move. Energy can make anything move.

Where does light energy come from?

• soil

• water

• the sun

Answer explanation

Light energy lets us see and it comes from the sun.

Where does solar energy come from?

• electricity

• the sun

• wind

Answer explanation

solar energy [SOH•ler EN•er•jee] energy from the sun Solar and sun begin with the same sound.

Solar energy is energy that comes from sunlight.

Solar panels collect energy from the sun.

Jeremy turns on a fan in his home. How is he using energy?

• to cool his home

• to cook food

• to warm his home

Answer explanation

As the hot air rises up, the blades of the fan slice this air and push it down. This being a continuous process causes the air in the room to circulate in the entire room. A ceiling fan only moves the air around.

Where could you build a home to help keep it cool?

• in the grass

• in the shade

• in the sun

Answer explanation

It is cool in the shade below a tree but not away from it because the tree leaves reduce the amount of sunlight falling under it. Since the intensity is reduced, the person sitting under the tree feels cold.

You claim that homes take in and hold heat from the sun. What evidence from this model home will support the claim?

• After time, the temperature inside will be higher than outside.

• After time, the temperature outside will be higher than inside.

• After time, the temperature inside and outside will be the same.

Answer explanation

There is no airflow in your house if you don't have an air-conditioned. This makes the inside of a home hotter then ourside.

A model house is in the sun. Soon, the temperature inside the model is higher than it is outside. What can you conclude?

• Electricity warms homes.

• The sun warms homes.

• The shade warms homes.

Answer explanation

There is no airflow in your house if you don't have an air-conditioned. This makes the inside of a home hotter then ourside.

You put a thermometer inside a model house. You put another thermometer outside the model. What claim are you gathering evidence for?

• Our homes take in and holds heat from the sun.

• The walls of the home stop light from entering.

• Our homes keep out wind.

Answer explanation

Surfaces in home take in energy from the sun.