Unit 1 - Thermal Energy Test

The measure of the average kinetic energy of the particles of a substance is the ...

• temperature

• heat

• thermal energy

• kinetic energy

What is the total energy of all of the particles in an object called?

• chemical energy

• heat

• temperature

• thermal energy

__________________ energy is the energy of motion.

• chemical

• potential

• heat

• kinetic

What do we call the movement of thermal energy from an object at a higher temperature to an object at a lower temperature?

• temperature

• heat

• convection

• Kelvin movement

In which sentence is the term 'heat' used correctly?

• Heat moves from a cold cup to warm tea.

• A thermometer measures the heat in an object.

• The heat from the hot cup warms my hands.

• Warm soup contains more heat than cold soup does.

The metal handle of the pan becomes very hot, causing an uncomfortable sensation in Willa's hand. What process transferred energy to Willa's hand?

• conduction

• convection

• insulation

• radiation

A flashlight runs on a battery. If the light is left on, the battery runs out and the flashlight stops working. Which statement best describes what happened to the battery's energy?

• it was destroyed

• it changed to potential energy

• it was stored as kinetic energy

• it was converted to thermal energy and light energy

The front door of a house is made of steel. When it is warm outside, the door sticks and it is difficult to open or close. When the weather is cool, the door does not stick. Which statement best explains the difference in the behavior of the door when the weather is warm compared to when it is cool?

• When a material contracts, it increases in volume due to an increase in kinetic energy.

• Different materials expand and contract at the same rates due to the kinetic energy being the same.

• Thermal expansion makes the door fit better when it is cooler due to a decrease in kinetic energy.

• The metal in the door expands when it becomes warm due to an increase in kinetic energy and contracts when it is cooler.

Adisyn sits by a fire and watches the logs burn bright and feels the warmth of the fire. Which one of these statements is true about the amount of energy transformed in the camp fire?

• The Law of Conservation of Energy does not apply to these transformations.

• The chemical energy in the logs is lost during the transformations.

• The amount of heat and light energy released equals the amount of chemical energy that is burned.

• The fire is hotter than the logs were, so energy is gained in this transformation.

Adding heat to matter causes the atoms to ...

• move slower

• move faster

• move backward

• not move