Energy Conversion Worksheet - Free Printable

Problem Description:

The task is to identify the objects in the images and describe the energy conversions that occur when these objects are used. The goal is to understand how electrical energy is transformed into other forms of energy in each case.

Solution:

#### Step 1: Identify the Objects
1. Image 1: A lamp (likely an incandescent or LED bulb).
2. Image 2: A computer.
3. Image 3: An iron.
4. Image 4: A radio.
5. Image 5: A fan.

#### Step 2: Describe the Energy Conversions

1. Lamp (Image 1):
- Object: Lamp (incandescent or LED bulb).
- Energy Conversion:
- Electrical energy → Light energy + Heat energy.
- Explanation: When electricity flows through the filament (in an incandescent bulb) or the semiconductor material (in an LED), it generates light. Additionally, some of the electrical energy is converted into heat.

2. Computer (Image 2):
- Object: Computer.
- Energy Conversion:
- Electrical energy → Light energy (screen), Sound energy (speakers), Heat energy (internal components).
- Explanation: The computer uses electrical energy to power its internal components (CPU, RAM, etc.), which generate heat. The screen converts electrical energy into light, and the speakers convert electrical energy into sound.

3. Iron (Image 3):
- Object: Iron.
- Energy Conversion:
- Electrical energy → Heat energy.
- Explanation: The iron uses electrical energy to heat up its soleplate, which is then used to smooth out wrinkles in clothes by applying heat.

4. Radio (Image 4):
- Object: Radio.
- Energy Conversion:
- Electrical energy → Sound energy.
- Explanation: The radio uses electrical energy to produce sound waves through its speakers. It may also generate some heat due to internal electronic components, but the primary conversion is to sound.

5. Fan (Image 5):
- Object: Fan.
- Energy Conversion:
- Electrical energy → Mechanical energy → Air movement.
- Explanation: The fan uses electrical energy to power a motor, which converts the electrical energy into mechanical energy. This mechanical energy is then used to rotate the fan blades, creating air movement.

Final Answer:

\[
\boxed{
\begin{array}{|c|c|}
\hline
\text{Image} & \text{Energy Conversion} \\
\hline
1 & \text{Electrical energy → Light energy + Heat energy} \\
\hline
2 & \text{Electrical energy → Light energy (screen), Sound energy (speakers), Heat energy (internal components)} \\
\hline
3 & \text{Electrical energy → Heat energy} \\
\hline
4 & \text{Electrical energy → Sound energy} \\
\hline
5 & \text{Electrical energy → Mechanical energy → Air movement} \\
\hline
\end{array}
}
\]

This completes the task of identifying the objects and describing the energy conversions for each.