Forms of Energy

An example of mechanical energy being converted into heat energy is ___________________.

• A) the sun.

• B) a generator.

• C) a Snickers bar.

• D) rubbing your hands together.

On Halloween, you take a glow stick, crack the capsule inside and shake it until it glows. This is an example of light energy being created from ___________________ energy.

• A) chemical

• B) mechanical

• C) solution

• D) thermal

What statement BEST describes sound?

• A) It’s a form of work.

• B) It’s a type of force.

• C) It’s a form of energy.

• D) It’s a type of acceleration.

Why do people tend to cup their hands around listeners' ears when whispering to them?

• A cupped hand makes the sound echo so the listener can hear more clearly.

• Solid objects, such as a cupped hand, can direct sound waves into the ear of the listener.

• The ear cannot absorb sound waves produced by a whisper without a cupped hand.

• Sound waves from a whisper are short; they will not reach the listener's ear unless guided by a hand.

Think about the examples of potential energy pictured above. Classify this type of potential energy and choose another correct example.

• potential chemical energy and food is an example

• potential elastic energy and a spring is an example

• potential light energy and a light bulb is an example

• potential electrical energy and an electric motor is an example

Why is it a better to wear a white shirt on a hot summer day instead of a black shirt?

• A white shirt absorbs all colors of light and would be cooler in the sun.

• A black shirt absorbs all colors of light and would be cooler in the sun.

• A black shirt reflects all colors of light and would be cooler in the sun.

• A white shirt reflects all colors of light and would be cooler in the sun.

What type of energy comes from the food that we eat?

• A) chemical

• B) electrical

• C) kinetic

• D) mechanical

Which of the following statements is TRUE?

• Sound travels through gases easier than liquids.

• Sound sometimes travels easier through gases than solids.

• Sound travels through solids easier than liquids.

• Sound travels through solids, liquids, and gases at the same speed.

Thermal energy is a type of ____________ energy

• chemical

• potential

• temperature

• heat

Energy that shows movement is called

• mechanical

• electrical

• chemical

• potential