5th Grade Energy Conservation and Transfer Palmer

Which statement explains why light from the Sun can warm up water in a glass?

• Light travels very fast.

• Light travels in straight lines.

• Water reflects light energy.

• Water absorbs light energy.

in general, metals are _____________________________.

• poor conductors of heat

• brittle

• poor conductors of electricity

• good conductors of heat

When you hold an ice cube, your hand feels cold because

• The cold flows from the ice cube to your hand.

• Heat flows from your hand to the ice cube.

• Ice is a poor conductor of heat.

• Your hand is a better conductor of heat than the ice cube.

The main method of heat transfer occurring within water is called __________.

• conduction

• convection

• radiation

• insulation

Which of the following materials is the best insulator?

• Copper

• Nickel

• Gold

• Wood

What is the primary source of energy on Earth?

• The Sun

• The Moon

• Water

• Rocks

A car skids along the road and smoke appears to be coming from under the tires. The heat that produces the smoke is caused by

• magnetism

• sound

• light

• friction

What form of energy causes an ice cube to melt?

• mechanical

• magnetic

• sound

• heat

What is the meaning of convection?

• cold rises heat sinks

• heat

• cold

• hot rises cold sinks

What is the meaning of conduction?

• when heat transfers from objects that are not touching

• heat rises

• cold sinks

• when heat transfers from objects that are touching