Energy Transfers Worksheet | PDF - Free Printable

Here is the step-by-step solution to complete your homework task.

Part 1: Energy Transfer – Spellings

*Note: This section lists key terms for you to learn. No answers are needed here, but keep these words in mind for the tables below.*

Part 2: Type of Energy Storage

We need to identify what kind of energy is stored inside each object before it is used.

1. Battery: Batteries store energy in chemicals that react to create electricity.
* *Answer:* Chemical potential
2. Parachute: When a parachute is high up in the sky, it has energy because of its height.
* *Answer:* Gravitational potential
3. Banana: Food contains energy that our bodies use. This is stored in the food itself.
* *Answer:* Chemical potential
4. Spring: When you squeeze or stretch a spring, it stores energy waiting to snap back.
* *Answer:* Elastic potential
5. Coal: Coal is a fuel. Like food and batteries, fuels store energy in their chemical bonds.
* *Answer:* Chemical potential

Fill-in-the-blank Sentence:
Energy cannot be created or destroyed, only changed.
* *Answer:* Energy can be transferred (or converted) from one form into another.

Part 3: Energy In / Energy Out

We need to look at what energy goes *into* an object and what useful energy comes *out* of it.

1. Car:
* *In:* The car needs fuel (petrol/diesel) to run. This is Chemical energy.
* *Out:* The car moves. This is Kinetic (movement) energy. *(Note: It also makes heat and sound, but movement is the main purpose).*
2. Lightbulb:
* *In:* You plug it into the wall. This is Electrical energy.
* *Out:* It gives off light. This is Light energy. *(It also gets hot, which is Thermal energy).*
3. Falling rocks:
* *In:* The rock starts high up. This is Gravitational potential energy.
* *Out:* As it falls, it speeds up. This becomes Kinetic energy.
4. Electric fire:
* *In:* It plugs into the wall. This is Electrical energy.
* *Out:* It warms up the room. This is Thermal (heat) energy.
5. Solar panel:
* *In:* It sits in the sun. This is Light energy.
* *Out:* It creates power for homes. This is Electrical energy.
6. Jack-in-the-box:
* *In:* You turn the handle to squash the spring down. This stores Elastic potential energy.
* *Out:* The toy pops up and moves. This is Kinetic energy.

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Final Answer:

Table 1: Type of energy storage
* Battery: Chemical potential
* Parachute: Gravitational potential
* Banana: Chemical potential
* Spring: Elastic potential
* Coal: Chemical potential

Sentence Completion:
Energy can be transferred from one form into another.

Table 2: Energy In / Energy Out

| Object | Energy In | Energy Out |
| :--- | :--- | :--- |
| Car | Chemical | Kinetic |
| Lightbulb | Electrical | Light (and Thermal) |
| Falling rocks | Gravitational potential | Kinetic |
| Electric fire | Electrical | Thermal |
| Solar panel | Light | Electrical |
| Jack-in-the-box | Elastic potential | Kinetic |