Energy

The primary source of power for a windmill is what?

• wind power

• solar power

• gravity

• electricity

A television produces light and __________ energy.

• chemical

• kinetic

• heat

• steam

Which of the following is most likely a source of energy for a hydroelectric dam?

• water falling from a height

• water evaporating

• water cooled by cool air

• water heated by electricity

What is the most common source of energy for ocean waves?

• earthquakes

• wind

• volcanoes

• the Sun

When a circuit is made up of a battery, a bulb, and a wire, how should the wire run to light up the bulb?

• The wires should run either from the bulb to the battery or from the battery to the bulb.

• The wired should run from the battery to the bulb only.

• The wire should run from the bulb to the battery only.

• The wire should run from the bulb to the battery and from the battery to the bulb.

What causes a sailboat with no engine to move?

• Air pushes the water, and the resulting water current causes the boat to move.

• The weight of the sailboat's sail tilts the boat forward, causing the boat to move.

• Air moving in the atmosphere transfers its energy to the boat's sail, causing the boat to move.

• Earth's magnetic field interacts with the metallic lining of the boat's sail, and the resulting force causes the boat to move.

What type of energy does a football have as it is flying through the air?

• electical and thermal

• kinetic and potential

• potential and electrical

• thermal and kinetic

Electrical companies send electric power through an electric power grid to your home. Which part of the grid is electrical energy produced from other types of energy?

• generating station

• substation

• distribution line

• transmission lines

Which shows thermal energy of a material decreasing?

• potatoes cooking in a pan

• water freezing into an ice cube

• snow melting when the temperature rises

• a ball bouncing on the floor

When using a toaster, which energy transformation are you using?

• electrical energy to light energy

• light energy to electrical energy

• electrical energy to heat energy

• heat energy to electrical energy