Forms of Energy

Adding thermal (heat) energy to matter can cause matter to change its physical state. When you remove a popsicle from the freezer, it is exposed to heat and begins to melt. When water is brought to a boil on the stove, thermal energy causes the water to change from liquid water to a gas called water vapor. The change from liquid to gas is called evaporation. How might an ice cube change from a solid to a liquid?

• Thermal energy causes the water to evaporate.

• Thermal energy melts the ice cube into liquid water.

• Thermal energy causes liquid water to evaporate.

• Thermal energy freezes liquid water into an ice cube.

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Solar panels and wind turbines are forms of alternative energy that help reduce people’s reliance on fossil fuels. What types of energy do they each use to produce electricity?

• Solar panels use light energy. Wind turbines use electrical energy.

• Both solar panels and wind turbines use thermal energy.

• Solar panels use light energy. Wind turbines use mechanical energy.

• Solar panels use thermal energy. Wind turbines use electrical energy.

A student recorded the time it took for all the water in a puddle on a sidewalk to evaporate after a rain. Which kind of energy causes water to evaporate?

• Light energy from streetlights

• Sounds energy from passing cars

• Thermal energy from the environment

• Mechanical energy from nearby streets

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A student plugs a hot plate into an outlet and turns on the hot plate to melt the ice. Complete the example to identify another object that used the same source of energy as the hot plate.

Drag and drop the correct answer in each box.

​ ​ (a)   ​ using ​ (b)   energy.

• toaster

• electrical

• light

• prism

• plant

• sound

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Select the

types of Energy

• Mechanical

  Electrical

  Light

  Thermal

  Sound

• Electrical

  Thermal

  light

• Sound

  Mechanical

• Mechanical

  Electrical

  Light

  Thermal

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Which form of energy is best shown in this picture?
(a)  

• mechanical

• electrical

• chemical

• nuclear

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A campfire, fireworks, and a burning candle all produce which forms of energy?

Select TWO correct answers.

• Mechanical Energy

• Thermal energy

• Light energy

• Solar energy

• Electrical energy

A student made a list of activities that involve energy. Each of these activities requires the use of what type of energy?

• thermal

• sound

• electrical

• mechanical

Which of the following is an example of the use of sound energy?

• A bat using echolocation to find its prey

• Blades on a wind turbine spinning

• A campfire heating marshmallows

• A power plant burning coal for power

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A toy car is shown. Which types of energy are used to make this toy car move?

• Light, electrical, and mechanical

• Mechanical, thermal, and chemical

• Light, chemical, and sound

• Thermal, electrical, and sound

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