Non-renewable resources worksheet with fill-in-the-blank questions and image identification.

Here's the completed worksheet with explanations for each answer.

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Part 1: Complete the sentences using words from the box

Words available:
animals, chemical, coal, fell, fossil, heat, millions, mud, natural gas, oil, plants, rock, rotting

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#### Sentence 1:
> Fuels contain a store of energy called chemical energy.
✔ *Explanation:* Fuels like coal, oil, and gas store energy in chemical bonds — this is known as chemical energy.

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#### Sentence 2:
> When fuels are burned the chemical energy is changed into heat energy.
✔ *Explanation:* Burning (combustion) breaks chemical bonds and releases energy as heat.

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#### Sentence 3:
> Some fuels, called fossil fuels, were formed from the remains of plants or animals.
✔ *Explanation:* Fossil fuels (coal, oil, natural gas) come from ancient organic matter — both plants and animals.

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#### Sentence 4:
> Coal was formed from dead plants. The plants were buried in mud, which stopped them rotting away.
✔ *Explanation:* Coal comes mostly from ancient swamp plants. Mud covered them quickly, preventing decomposition.

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#### Sentence 5:
> More mud buried and squashed them. The mud turned into rock and the dead plants turned into coal.
✔ *Explanation:* Over time, layers of mud become sedimentary rock under pressure, while plant material becomes coal.

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#### Sentence 6:
> Oil and gas were formed from plants and animals that lived in the sea. When they died they fell to the sea bed and were buried. Over millions of years they were squashed and heated, and turned into oil and natural gas.
✔ *Explanation:* Marine organisms (plankton, algae, small animals) sank to the ocean floor. Under heat and pressure over millions of years, they became oil and natural gas.

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✔ Final Completed Sentences:

1. Fuels contain a store of energy called chemical energy.
2. When fuels are burned the chemical energy is changed into heat energy.
3. Some fuels, called fossil fuels, were formed from the remains of plants or animals.
4. Coal was formed from dead plants. The plants were buried in mud, which stopped them rotting away.
5. More mud buried and squashed them. The mud turned into rock and the dead plants turned into coal.
6. Oil and gas were formed from plants and animals that lived in the sea. When they died they fell to the sea bed and were buried. Over millions of years they were squashed and heated, and turned into oil and natural gas.

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Part 2: Match images to energy sources

You are to write: “coal”, “oil”, “natural gas” or “nuclear energy”

#### Image 1: Car → oil
✔ *Explanation:* Most cars run on gasoline, which is refined from oil.

#### Image 2: Fireplace with burning logs/coal → coal
✔ *Explanation:* The image shows a fireplace with lumps that look like coal (not wood logs). Coal is commonly used in fireplaces or stoves for heating.

#### Image 3: Gas stove with flame → natural gas
✔ *Explanation:* Gas stoves typically burn natural gas piped into homes.

#### Image 4: Nuclear power plant (with cooling towers) → nuclear energy
✔ *Explanation:* The large cooling towers and reactor building are characteristic of a nuclear power plant.

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✔ Final Answers for Part 2:

1. oil
2. coal
3. natural gas
4. nuclear energy

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