Energy Unit Project

Which is the best indicator that thermal energy is moving between two objects?

• The temperature of both objects changes until they are equal.

• The temperature of both objects remain the same

• The temperature of both objects decreases.

Which is the best color for absorbing heat?

• blue

• white

• black

Which statement best describes what happens to water that is heated to a boil in a pot?

• Cold water rises, and hot water sinks

• Cold water sinks, and hot water rises.

The sun′s rays warming the sidewalk on a hot day are an example of which type of heat transfer?

• conduction

• convection

• evaporation

• radiation

Pete wraps his hands around a cup of hot tea. Which type of energy transfer is most responsible for the warmth Pete feels on his hands?

• absorption

• conduction

• convection

A cup of hot chocolate is mixed with a metal spoon. Which statement best explains how heat is transferred between the hot chocolate and the part of the spoon that is in the hot chocolate?

• Convection transfers energy from the hot chocolate to the spoon.

• Conduction transfers energy from the hot chocolate to the spoon.

How does energy transfer when an ice cube is placed in a cup of room-temperature liquid water?

• Heat flows from the liquid water to the ice cube.

• Heat flows from the ice cube to the liquid water.

Which is the exchange of heat between two objects?

• conduction

• convection

Why does a person′s hand feel cold when holding ice cubes?

• Heat flows from the hand to the ice by conduction.

• The hand is insulated against heat by the ice cubes.

Which energy transformation occurs in a toaster?

• chemical to electric

• electric to thermal