The task involves identifying the energy transformations for each of the items shown in the images. Let's analyze each one step by step:
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a) Iron
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Image: An iron with a cord.
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Description: Electrical energy is transferred to thermal energy.
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Explanation: When an iron is plugged into an electrical outlet, it uses electrical energy. Inside the iron, this electrical energy is converted into heat (thermal energy) through resistive heating elements. The heat generated is then used to smooth out wrinkles in clothes.
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Answer:
Electrical energy → Thermal energy
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b) Wind Turbine
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Image: A wind turbine.
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Description: Mechanical energy is transferred to electrical energy.
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Explanation: Wind turbines capture the kinetic energy of moving air (wind). This mechanical energy from the rotating blades is then converted into electrical energy using a generator inside the turbine. This process allows us to harness renewable energy.
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Answer:
Mechanical energy → Electrical energy
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c) Flashlight
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Image: A flashlight.
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Description: Chemical energy is transferred to light energy.
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Explanation: A flashlight typically uses batteries as its power source. The chemical energy stored in the batteries is converted into electrical energy when the flashlight is turned on. This electrical energy is then transformed into light energy by the bulb or LED inside the flashlight.
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Answer:
Chemical energy → Light energy
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d) Solar Panels
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Image: Solar panels under sunlight.
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Description: Light energy is transferred to electrical energy.
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Explanation: Solar panels absorb light energy from the sun. This light energy is then converted into electrical energy through the photovoltaic effect, where photons (particles of light) knock electrons free in the solar cells, creating an electric current.
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Answer:
Light energy → Electrical energy
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e) Car Being Fueled
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Image: A person fueling a car.
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Description: Chemical energy is transferred to mechanical energy.
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Explanation: When a car is fueled with gasoline or another type of fuel, the chemical energy stored in the fuel is released during combustion in the engine. This chemical energy is converted into mechanical energy, which powers the car's movement.
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Answer:
Chemical energy → Mechanical energy
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f) Radio
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Image: A radio connected to a power source.
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Description: Electrical energy is transferred to sound energy.
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Explanation: A radio receives electrical signals (often via radio waves) and converts them into sound. Inside the radio, electrical energy is used to drive a speaker, which vibrates to produce sound waves that we can hear.
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Answer:
Electrical energy → Sound energy
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Final Answers:
1.
a) Electrical energy →
Thermal energy
2.
b) Mechanical energy →
Electrical energy
3.
c) Chemical energy →
Light energy
4.
d) Light energy →
Electrical energy
5.
e) Chemical energy →
Mechanical energy
6.
f) Electrical energy →
Sound energy
Boxed Final Answer:
\[
\boxed{
\text{a) Thermal, b) Electrical, c) Light, d) Electrical, e) Mechanical, f) Sound}
}
\]
Parent Tip: Review the logic above to help your child master the concept of energy conversions worksheet.
