Forms of energy

A student found an object on the playground. He noticed the object was smooth, shiny, and conducts electricity. The material of the object is most likely...

• foam

• wood

• plastic

• metal

A student put earplugs in their ears so they couldn't hear a sound. How can the student tell if the music from the radio is still playing without hearing it?

• see if the object changed shape

• feel for vibrations

• see if the object changed temperature

• see if light is shining

The diagram above shows a light ray striking an object. Based on the way the light rays travel, the object in the diagram is most likely a...

• piece of plastic

• piece of wood

• mirror

• magnifying glass

If the tea in a thermos is 95 degrees Celsius and one hour later the temperature is 93 degrees Celsius, what can you infer about the thermos bottle?

• The bottle is a good conductor

• The bottle is a good insulator

• There is nothing to infer

• The tea tastes good

Why are electrical cords covered in plastic?

• To make the energy flow faster

• To make the object get hotter

• Plastic is a good conductor

• Plastic is a good insulator

To make a complete circuit, which object is a good conductor?

• rubber band

• plastic spoon

• penny

• shoe lace

What causes sound energy?

• vibrations

• heat

• light

• energy

This picture is an example of light...

• reflecting

• refracting

• transmission

• transparency

Which shows an example of mechanical energy?

• a toaster heating bread

• a cell phone charging

• sharks chasing a school of fish

• a fan cooling a room

What form of energy is being used when a person pushes a heavy box across the room?

• light energy

• thermal energy

• sound energy

• mechanical energy