Energy Transformations - Worksheet | Printable and Distance ... - Free Printable

You've uploaded a worksheet question asking to identify the energy transformations for each item shown. Let’s go through each part one by one and explain why the answers are correct.

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a) Iron (Electric Iron)

> Electrical energy is transferred to _thermal_ energy.

✔ Explanation:
An electric iron uses electricity to heat up its metal base. The primary purpose is to generate heat for pressing clothes. So, electrical energy → thermal (heat) energy. This is a classic example of resistive heating — current flowing through a coil generates heat.

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b) Wind Turbine

> Mechanical energy is transferred to _electrical_ energy.

✔ Explanation:
Wind turbines use the kinetic energy of moving air (wind) to spin blades. This spinning motion (mechanical energy) turns a generator inside the turbine, which converts it into electrical energy. So: mechanical → electrical.

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c) Flashlight (Battery-powered)

> Chemical energy is transferred to _light_ energy.

✔ Explanation:
The batteries in a flashlight store chemical energy. When you turn it on, a chemical reaction occurs inside the battery, producing electrical energy, which then powers the bulb or LED to emit light. So the overall transformation is:
Chemical → Electrical → Light
But since the question asks for the *main* transformation from source to output, we say chemical → light (simplified).

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d) Solar Panels (with Sun)

> Light energy is transferred to _electrical_ energy.

✔ Explanation:
Solar panels absorb photons from sunlight (light energy) and convert them directly into electrical energy via the photovoltaic effect. So: light → electrical.

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e) Person using an Air Compressor / Pneumatic Tool on a Car

> Chemical energy is transferred to _mechanical_ energy.

✔ Explanation:
This image likely shows someone using an air compressor or pneumatic tool powered by gasoline or diesel (or even a battery). The fuel contains chemical energy, which is burned (in an engine) or converted (in a battery) to produce motion — mechanical energy — to power the tool. So: chemical → mechanical.

*(Note: If it’s an electric air compressor plugged in, then it would be electrical → mechanical. But since the answer given is “chemical,” it implies the power source is fuel-based — like a gas-powered compressor.)*

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f) Radio (Plugged In)

> Electrical energy is transferred to _sound_ energy.

✔ Explanation:
A radio receives electrical energy (from outlet or battery), processes the signal, and uses a speaker to vibrate air molecules — producing sound waves. So: electrical → sound.

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## ✔ Final Answer Summary:

| Item | Energy Transformation |
|------|------------------------|
| a) Iron | Electrical → Thermal |
| b) Wind Turbine | Mechanical → Electrical |
| c) Flashlight | Chemical → Light |
| d) Solar Panel | Light → Electrical |
| e) Air Compressor/Tool | Chemical → Mechanical |
| f) Radio | Electrical → Sound |

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## 📝 Key Concept:
Energy can’t be created or destroyed — it only changes form. Each device transforms energy from one type to another, usually with some loss (often as heat), but we focus on the main useful output.

Let me know if you’d like diagrams or deeper physics behind any of these!