Magnet magic (law of poles) | 5th grade Science Worksheet ... - Free Printable

Let's solve the problem step by step based on the image you've described.

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The Problem:

We are given a scenario involving magnets and magnetic fields. The key parts of the task are:

1. A compass is placed near a magnetic needle (which is like a bar magnet).
2. The compass needle points in a certain direction when the magnet is present.
3. The question asks:
> "If a compass is placed with a magnetic needle, what would be the direction of the compass needle? What will happen if you reverse the poles of the magnet?"

But from your description and the text provided, it seems that the actual problem is likely this:

> "A compass is placed with a magnetic needle. Like a needle and make a second time with a magnet in one direction. Place the needle on a thin piece of card. That the card is made. Before you place the card, predict what you think will happen. Explain all of your observations. You may also want to try to design a different type of compass and test it."

Wait — actually, let’s clarify based on the image content you've described.

From the text visible in the image:

> "The magic of magnets"
> Background knowledge: Every magnet has a north pole and a south pole...
> Science activity: Draw a diagram showing how the compass needle aligns with the magnetic field.
> The diagram below shows pairs of magnets. The arrows show the direction in which the compass moves when placed near each other. In the boxes on each magnet, write the symbol (N or S) to show the correct pole."

So there’s a diagram showing two bar magnets, with arrows indicating the movement of a compass needle near them. Based on those arrows, we need to determine the polarity (N or S) of each end of the magnets.

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Step-by-step Solution:

#### Understanding Compass Behavior:
- A compass needle is itself a small magnet with a north-seeking pole (usually painted red or marked "N").
- The compass needle aligns itself with the magnetic field lines.
- Magnetic field lines go from North to South outside a magnet.
- So, the compass needle’s north pole points toward the south pole of a nearby magnet.

> 🔍 Key Rule:
> Compass needle's north pole is attracted to the south pole of a magnet.

---

Analyzing the Diagram:

Let’s assume the diagram shows two bar magnets side by side, with arrows showing the direction the compass needle turns near each end.

From your description:
- There are two bar magnets, labeled as:
- Left magnet: top = N, bottom = ?
- Right magnet: top = ?, bottom = S
- But wait — the image says:
> "The diagram below shows pairs of magnets. The arrows show the direction in which the compass moves..."

Let’s reconstruct based on typical textbook problems.

Assume the diagram shows:

```
[N] [S]
-----> <-----
Magnet A Magnet B
```

But more likely, the diagram shows two magnets placed close together, and compass needles near their ends, with arrows showing the direction they point.

Let’s suppose the diagram looks like this (based on common setups):

```
Magnet 1: ___[N]_____[S]___
↑ ↑
↗ ↘
(compasses)
```

But actually, from your description, it appears there are two separate magnets, and compasses are placed around them, showing arrow directions.

Let’s use a standard setup:

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Typical Scenario:

Suppose we have two bar magnets arranged like this:

```
Magnet A: N → S
↓ ↓
(compass) (compass)

Magnet B: S ← N
↑ ↑
(compass) (compass)
```

But instead, let’s suppose the diagram shows:

- Two bar magnets placed side by side, with compasses near their ends.
- Arrows show the compass needle pointing toward or away from the magnet ends.

Now, here’s the key idea:

> If a compass needle points toward a magnet end, that end must be South (because compass north is attracted to magnet south).

> If a compass needle points away from a magnet end, that end must be North (because compass north is repelled by magnet north).

---

Apply This Logic:

Let’s assume the diagram shows:

- On the left magnet, the compass near the top points into the magnet → so that end is S.
- On the left magnet, the compass near the bottom points out of the magnet → so that end is N.
- On the right magnet, the compass near the top points out → so that end is N.
- On the right magnet, the compass near the bottom points in → so that end is S.

But wait — the image might show something like:

```
[ ] [ ]
↑ ↑
↖ ↗
(compass) (compass)
```

Wait — better to look at the actual layout.

From your description:

> "The diagram below shows pairs of magnets. The arrows show the direction in which the compass moves when placed near each other."

And there are boxes on each magnet where we must write N or S.

Let’s suppose the diagram is like this (common in textbooks):

```
[N] [S]
↓ ↓
↙ ↘
(compass) (compass)
```

But no — actually, the arrows show the direction the compass needle points.

So, for example:

- If the compass needle points toward a magnet end, that end is S.
- If it points away, that end is N.

---

Example:

Suppose the diagram shows:

- Near the left end of the left magnet, the compass needle points toward it → so that end is S.
- Near the right end of the left magnet, the compass needle points away → so that end is N.
- Near the left end of the right magnet, the compass needle points away → so that end is N.
- Near the right end of the right magnet, the compass needle points toward it → so that end is S.

Thus, we fill in:

```
Left magnet: S → N
Right magnet: N → S
```

But wait — the magnets are likely placed end-to-end, and the compasses are between them.

But based on the image text:

> "In the boxes on each magnet, write the symbol (N or S) to show the correct pole."

And the diagram probably shows two magnets with arrows showing compass direction.

Let’s assume the actual diagram shows:

- A compass near the left end of the first magnet: arrow pointing into the magnet → so that end is S.
- A compass near the right end of the first magnet: arrow pointing out → so that end is N.
- A compass near the left end of the second magnet: arrow pointing out → so that end is N.
- A compass near the right end of the second magnet: arrow pointing into → so that end is S.

Therefore:

```
First magnet: S → N
Second magnet: N → S
```

So the magnets are oriented such that like poles face each other (N-N and S-S), meaning they repel.

But if the compasses show attraction, then opposite poles face.

Wait — perhaps the magnets are attracting.

Let’s suppose the compass near the right end of the first magnet points toward the second magnet → so the second magnet’s left end is S (attracts compass north).

So:

- First magnet: left = N, right = S
- Second magnet: left = S, right = N

Then they attract.

So the poles are:

```
First magnet: N → S
Second magnet: S → N
```

This makes sense.

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✔ Final Answer:

Based on the compass needle directions:

- The compass needle points toward a magnet end → that end is S.
- The compass needle points away from a magnet end → that end is N.

So, label the boxes accordingly.

For example:

```
First magnet: N → S
Second magnet: S → N
```

Or, depending on the diagram, it could be:

```
[ N ] [ S ]
[ S ] [ N ]
```

But since you said "the diagram below shows pairs of magnets", and there are boxes on each magnet, we need to assign N or S to each end.

---

Science Investigation Part:

> "If a compass is placed with a magnetic needle, what would be the direction of the compass needle? What will happen if you reverse the poles of the magnet?"

#### Answer:

1. Normal case:
The compass needle aligns with the magnetic field. Its north pole points toward the south pole of the magnet.

2. If you reverse the poles:
The magnetic field reverses direction. So the compass needle will now point in the opposite direction.

Example:
If originally the compass pointed to the right, after reversing the magnet, it will point to the left.

---

Conclusion:

To complete the task:

1. Label the poles of the magnets in the diagram based on compass needle direction:
- If compass points into the magnet → that end is S.
- If compass points away → that end is N.

2. Explain:
Compass needles align with magnetic fields. Their north poles are attracted to the south poles of magnets.

3. Prediction:
Reversing the magnet’s poles reverses the magnetic field, so the compass needle will flip direction.

---

✔ Final Boxed Answer:

> Label the magnets as follows:
>
> - Left magnet: Top = S, Bottom = N
> - Right magnet: Top = N, Bottom = S
>
> *(Assuming compasses point into the top of left magnet and out of bottom of right magnet)*
>
> Explanation:
> The compass needle’s north pole is attracted to the south pole of the magnet. Therefore, if the compass points toward a magnet end, that end is S; if it points away, that end is N.
>
> Reversing the poles will reverse the magnetic field, so the compass needle will point in the opposite direction.

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Let me know if you can describe the exact diagram (e.g., which way the arrows point), and I can give the precise labeling!