2.07 Help Worksheet | PDF - Free Printable

Let’s solve each energy conversion problem step by step, using the energy types provided: Potential, Kinetic, Chemical, Electrical, Nuclear, Thermal, Sound, and Light.

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1. A battery in a flashlight is an example of _chemical_ energy being converted into _electrical_ energy.

✔ Explanation:
A battery stores energy in chemical form (from reactions between its internal materials). When you turn on the flashlight, the chemical energy is converted into electrical energy, which flows through the circuit to power the bulb.

*(Note: The bulb then converts electrical energy into light and thermal energy — but the question asks about the battery’s role, so we focus on chemical → electrical.)*

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2. Turning on the TV at your house is an example of _electrical_ energy being converted into both _light_ and _sound_ energy.

✔ Explanation:
Your TV receives electrical energy from the outlet. It uses that energy to produce images (light energy) and audio (sound energy). Some thermal energy is also produced (heat from components), but since the question specifies “both ___ and ___”, and light and sound are the primary outputs, those are the best fits.

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3. A match being lit is an example of _chemical_ energy being converted into _thermal_ and _light_ energy.

✔ Explanation:
The match head contains chemicals that react when struck. This chemical reaction releases energy in the form of heat (thermal energy) and visible flame (light energy). So, chemical → thermal + light.

*(Note: The question says “converted into ___ energy” — singular — but since two forms are produced, it’s acceptable to list both. In many curricula, this is accepted as “thermal and light.”)*

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4. A baseball being hit by a baseball bat is an example of _kinetic_ energy being converted into _kinetic_ energy.

✔ Explanation:
This one is tricky! The batter swings the bat — that’s kinetic energy. When the bat hits the ball, the kinetic energy is transferred *to* the ball, giving it kinetic energy (it flies away). So, kinetic energy (in bat) → kinetic energy (in ball).

You might think “potential” or “sound,” but the main conversion here is transfer of motion — kinetic to kinetic. There’s also some sound and thermal energy produced from the impact, but the dominant, intended energy transfer is kinetic → kinetic.

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5. The sunlight shining on solar panels is an example of _light_ energy being converted into _electrical_ energy. This energy is then transferred into _light_ energy when we turn on a lamp.

✔ Explanation:
Solar panels absorb sunlight (light energy) and convert it into electrical energy via the photovoltaic effect. That electricity can then be stored or used immediately — for example, to power a lamp, which converts electrical energy back into light energy (and some thermal energy).

So:
Sunlight → (solar panel) → electrical energy → (lamp) → light energy.

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## ✔ Final Answers:

1. Chemical → Electrical
2. Electrical → Light and Sound
3. Chemical → Thermal and Light
4. Kinetic → Kinetic
5. Light → Electrical → Light

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Let me know if you’d like diagrams or deeper explanations for any part!