The task involves identifying the energy transformations for each of the items shown in the images. Let's analyze each case 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 to heat up its soleplate. This heating process converts electrical energy into thermal (heat) energy, which is then used to smooth out wrinkles in clothes.
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 harness the kinetic energy of moving air (wind). The blades of the turbine rotate due to the force of the wind, converting mechanical energy into rotational motion. This rotational motion is then used to generate electrical energy through a generator inside the turbine.
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 reactions within the battery release energy, which is converted into electrical energy. This electrical energy is then used by the bulb or LED inside the flashlight to produce light.
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 capture light energy from the sun. The solar cells within the panels convert this light energy into electrical energy through the photovoltaic effect. This electrical energy can then be used to power various devices.
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 combustion generates mechanical energy, which is used to move the car's pistons and ultimately drive the wheels.
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 uses electrical energy to power its internal components. These components convert the electrical energy into sound waves, which are then emitted through the speakers.
Answer: Electrical energy →
sound energy.
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Final Answers:
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a) Electrical energy →
thermal energy.
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b) Mechanical energy →
electrical energy.
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c) Chemical energy →
light energy.
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d) Light energy →
electrical energy.
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e) Chemical energy →
mechanical energy.
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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 transformation worksheet 6th grade.
