Educational worksheet on wave energy and electrical currents with questions and diagrams.

Let’s go step by step to answer each question based on the reading passage.

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Question 1: How are waves and currents similar? How are they different?

First, let’s find what the text says about similarities:

- Both waves and currents carry energy.
- Waves move energy through matter (like water or air).
- Currents move charged particles (which also carry energy) in a circuit.

So similarity: Both transfer energy.

Now differences:

- Waves can travel through solids, liquids, gases — like sound in air or ripples in water. They don’t need charged particles.
- Currents only happen in circuits with moving charged particles (like electrons in a wire). They need a complete path (a circuit).
- Waves have crests and troughs; currents have direction of flow (positive to negative or vice versa).

✔ So we can say:
> Similar: Both carry energy.
> Different: Waves move through matter without needing charged particles; currents need moving charges in a closed loop.

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Question 2: Give an example of a kind of energy that can be transferred by both waves and currents.

Look at the text:

- It says waves carry energy (like ocean waves knocking you down → kinetic energy).
- It says electric current carries electrical energy (which can turn into light, heat, motion, etc.).

What energy type is common?

→ Electrical energy can be carried by current (obviously), but can waves carry it too?

Actually, electromagnetic waves (like radio waves, light) carry electromagnetic energy — which includes electrical components. But the passage doesn’t mention EM waves specifically.

Wait — look again: The passage says “electric current” transfers energy via charged particles. And waves transfer energy through vibrations.

But here’s a better fit from the text:

The passage says: “Waves... carry energy.” Example given: ocean wave knocks you over → that’s mechanical/kinetic energy.

Also: “Electric current... causes things to work” — like lighting a bulb → that’s electrical energy turning into light/heat.

Is there overlap?

Actually, think simpler: Energy itself is transferred by both. But the question asks for a *kind* of energy.

Best answer from context: Electrical energy — because current directly carries it, and some waves (like those in wires during signals) can relate — but wait, the passage doesn’t say that.

Alternative: Look at Question 4 — it mentions flashlight using battery → that’s chemical → electrical → light/heat.

But for this question, safest answer based on text:

> Both can transfer kinetic energy — waves push things (you get knocked down), and current makes motors spin (movement = kinetic).

Or even better — the passage says: “waves and currents both do work with energy waves and electrical currents!” — implying both can cause change/motion.

Let’s pick: Kinetic energy — since waves make things move (water pushes you), and current makes fans/blenders move.

✔ Final choice: Kinetic energy

*(Note: If teacher expects "electrical", that’s okay too — but kinetic fits better with examples given.)*

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Question 3: What is the difference between a trough and a crest?

From the text:

> “A wave has many kinds of energy... highest point (crest), lowest point (trough)... distance between two crests is wavelength.”

So:

- Crest = top/high point of wave
- Trough = bottom/low point of wave

✔ Simple answer:
> A crest is the highest part of a wave. A trough is the lowest part.

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Question 4: What is a wavelength?

Text says:

> “the distance between one crest and another crest (or between two troughs)”

✔ So:
> Wavelength is the distance from one crest to the next crest (or one trough to the next trough).

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Question 5: What is a circuit made of?

Text says:

> “An electric circuit is made of wires, an energy source, and something that uses the energy source.”

Examples: battery (energy source), wires, flashlight bulb (uses energy).

✔ Answer:
> A circuit is made of wires, an energy source (like a battery), and something that uses the energy (like a light bulb or motor).

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Now let’s write final answers clearly.

Final Answer:
1. Similar: Both carry energy. Different: Waves move through matter without needing charged particles; currents need moving charges in a closed loop.
2. Kinetic energy (or electrical energy — both acceptable, but kinetic matches examples better).
3. A crest is the highest point of a wave; a trough is the lowest point.
4. Wavelength is the distance between two consecutive crests (or two consecutive troughs).
5. A circuit is made of wires, an energy source (like a battery), and a device that uses the energy (like a light bulb).