Types of Energy online worksheet - Free Printable

Let’s solve this step by step.

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Part 1: Match the definitions to the types of energy.

We’ll go one definition at a time and match it to the correct energy type.

1. “It’s stored inside matter and released by a chemical reaction.”
→ This is chemical energy. (Like in food or batteries — energy stored in bonds, released when chemicals react.)

2. “It comes from the nucleus of the atom.”
→ That’s nuclear energy. (From splitting or joining atoms’ nuclei — like in power plants or the sun.)

3. “It’s produced by moving electric charges (electrons).”
→ That’s electrical energy. (Electricity = moving electrons.)

4. “It’s produced by the rise of temperature in an object.”
→ That’s thermal energy. (Heat = thermal energy. When something gets hotter, its particles move faster.)

5. “It’s the sum of potential and kinetic energy, and it’s associated to movement and position.”
→ That’s mechanical energy. (Example: A swinging pendulum has both motion [kinetic] and height [potential].)

6. “It’s transmitted through waves when there is a vibration.”
→ That’s sound energy. (Sound travels as vibrations through air, water, etc.)

7. “It’s produced by sources of light.”
→ That’s luminous energy. (Light bulbs, the sun, fireflies — they give off light energy.)

✔ So the matches are:

- sound energy → It’s transmitted through waves when there is a vibration.
- mechanical energy → It’s the sum of potential and kinetic energy...
- chemical energy → It’s stored inside matter and released by a chemical reaction.
- luminous energy → It’s produced by sources of light.
- thermal energy → It’s produced by the rise of temperature...
- nuclear energy → It comes from the nucleus of the atom.
- electrical energy → It’s produced by moving electric charges...

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Part 2: Choose the correct type of energy for each example.

Let’s look at each situation:

1. Baking a cake in the oven, when the heat of the oven is transferred to the cake so that it cooks.
→ Heat = thermal energy.
*(Not chemical — even though baking involves chemistry, the question says “heat is transferred,” which is thermal.)*

2. During photosynthesis, plants use the energy from the Sun to obtain their nutrients.
→ The Sun gives us light, so that’s luminous energy.
*(Plants convert light into chemical energy later, but the input here is sunlight → luminous.)*

3. Uranium is used to produce electrical energy in a power plant.
→ Uranium is used in nuclear reactors → nuclear energy is the source.
*(They turn nuclear energy into electricity, but the original energy type from uranium is nuclear.)*

4. When we digest food, we transform their energy to obtain nutrients.
→ Food stores chemical energy. Our body breaks it down to use that energy.
→ So answer: chemical

5. Lightning happens when electricity is released into the atmosphere.
→ Lightning is a giant spark of electricity → electrical energy

✔ Final choices:

- Baking a cake → thermal
- Photosynthesis → luminous
- Uranium in power plant → nuclear
- Digesting food → chemical
- Lightning → electrical

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Final Answer:

Part 1 Matches:

- sound energy → It’s transmitted through waves when there is a vibration.
- mechanical energy → It’s the sum of potential and kinetic energy, and it’s associated to movement and position.
- chemical energy → It’s stored inside matter and released by a chemical reaction.
- luminous energy → It’s produced by sources of light.
- thermal energy → It’s produced by the rise of temperature in an object.
- nuclear energy → It comes from the nucleus of the atom.
- electrical energy → It’s produced by moving electric charges (electrons).

Part 2 Answers:

- Baking a cake → thermal
- Photosynthesis → luminous
- Uranium in power plant → nuclear
- Digesting food → chemical
- Lightning → electrical