Energy Unit Test Review Warmup

Which set of terms best defines what affects kinetic energy and potential energy, respectively?

• position, gravity

• gravity, velocity

• velocity, height

• height, position

As a person pushes a box across a floor, the energy from the person’s moving arm is transferred to the box, and the box and the floor become warm. During this process, what happens to energy?

• It is increased.

• It is conserved.

• It is decreased.

• It is created.

Which of these indicates that a liquid has transferred thermal energy to the air?

• The liquid increases in temperature, and its particles lose kinetic energy.

• The liquid decreases in temperature, and its particles gain kinetic energy.

• The liquid increases in temperature, and its particles gain kinetic energy.

• The liquid decreases in temperature, and its particles lose kinetic energy.

A stovetop burner on medium reaches 95°C. Which other object will receive a flow of heat directly from the burner?

• the surrounding air

• a burner at the same temperature

• a pan heated to 100°C

• a pan heated to 100°C

The diagram shows movement of thermal energy. Which letters show heat transfer through conduction?

• W and X

• X and Z

• Y and Z

• Z and W

Which best describes convection?

• It relies on the collision of particles within or between substances.

• It occurs in solids, liquids, or gases that are heated.

• It results when portions of a liquid cool and rise.

• It is driven by temperature differences within a fluid.

Which material most likely gets the warmest when placed in the Sun?

• white cement

• beige sand

• brown mulch

• yellow pebbles

How does heat move?

• from a warmer object to a cooler object

• from a cooler object to a warmer object

• from a warmer object to an object of the same temperature

• from a cooler object to an object of the same temperature

Which is the BEST example of radiation?

• The sun heating up the earth

• Water boiling in a pot on the stove

• A hot air balloon rising and falling in the air

• A dog lying on warm pavement

Which is the BEST choice of convection?

• Water boiling in a pot on the stove

• The sun heating up the earth

• A dog lying on warm pavement

• An egg cooking in a hot frying pan