Energy Test

Which of the following factors affect gravitational potential energy?

• Mass and height

• Temperature and pressure

• Speed and velocity

• Color and texture

If you were a caveman and were using two sticks to start a fire, how could you make it more likely to ignite?

• Use dry wood and create more friction

• Use wet wood and less friction

• Use any type of wood with no friction

• Use metal sticks instead of wooden sticks

The law of conservation of energy states that:

• Energy can be created or destroyed.

• Energy can be transformed from one form to another, but cannot be created or destroyed.

• Energy is always increasing in the universe.

• Energy is only conserved in closed systems.

A gasoline powered car is 20% efficient. What does this mean?

• It converts 20% of the gasoline's energy into mechanical energy.

• It uses 20% less gasoline than other cars.

• It emits 20% less pollution than other cars.

• It has a 20% chance of breaking down.

Which of the following is an example of electrical energy being converted into sound energy?

• A light bulb emitting light

• A fan rotating

• A speaker playing music

• A heater warming a room

When you leave the refrigerator door open, energy is transferred in the form of:

• heat entering the refrigerator from the room

• cold air leaving the refrigerator to the room

• electricity being used more efficiently

• light being emitted from the refrigerator

Which of the following is an example of kinetic energy transforming to thermal energy?

• A car engine heating up while running

• A book resting on a table

• A light bulb emitting light

• A plant photosynthesizing

What determines how much thermal energy can be stored in an object?

• The mass of the object

• The temperature of the object

• The specific heat capacity of the object

• All of the above

What materials conduct thermal energy?

• Metals

• Plastics

• Wood

• Glass

Which of the following is an example of chemical energy being transformed into thermal energy?

• A car engine burning gasoline

• A solar panel converting sunlight

• A wind turbine generating electricity

• A battery powering a flashlight