Science Grade 6 Unit 7 Questions, answers, and explanations for each question

PART I: Multiple-Choice Questions

1. The magnetic field means Answer: (a) area around the magnet Explanation: A magnetic field is the area around a magnet where magnetic forces can be observed, affecting objects within this field.
2. The below given magnet is Answer: (b) Horse shoe magnet Explanation: This shape refers to a horseshoe magnet, known for its distinctive "U" shape, which brings the poles closer to concentrate the magnetic force.
3. Which set contains only magnetic materials? Answer: (c) Steel, iron, cobalt Explanation: Only steel, iron, and cobalt are magnetic materials in the options provided, meaning they can be magnetized or attracted to magnets.
4. What is the correct sentence? Answer: (c) unlike poles attract Explanation: Unlike poles (north and south) attract each other, while like poles repel.
5. Which equipment helps to detect magnetism? Answer: (d) Compass Explanation: A compass detects magnetism by aligning itself with the Earth's magnetic field, and it can also be used to detect the presence of other magnetic fields.

PART II: Descriptive and Practical Questions

1. Draw 4 different types of magnets.
2. What is a magnetic pole?
3. Observation with Different Objects
4. Explain a simple activity to observe the magnetic field. Draw suitable diagram.
5. Following activity is performed to observe the strength of a magnet.
6. Write 2 ways of damaging magnets.

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### PART I: Multiple-Choice Questions

1. The magnetic field means

Answer: (a) area around the magnet

Explanation: A magnetic field is the area around a magnet where magnetic forces can be observed, affecting objects within this field.

2. The below given magnet is

Answer: (b) Horse shoe magnet

Explanation: This shape refers to a horseshoe magnet, known for its distinctive "U" shape, which brings the poles closer to concentrate the magnetic force.

3. Which set contains only magnetic materials?

Answer: (c) Steel, iron, cobalt

Explanation: Only steel, iron, and cobalt are magnetic materials in the options provided, meaning they can be magnetized or attracted to magnets.

4. What is the correct sentence?

Answer: (c) unlike poles attract

Explanation: Unlike poles (north and south) attract each other, while like poles repel.

5. Which equipment helps to detect magnetism?

Answer: (d) Compass

Explanation: A compass detects magnetism by aligning itself with the Earth's magnetic field, and it can also be used to detect the presence of other magnetic fields.

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### PART II: Descriptive and Practical Questions

1. Draw 4 different types of magnets.

- Answer: (No specific answer; students are expected to draw common types like bar, horseshoe, ring, and disc magnets.)

2. What is a magnetic pole?

- Answer: The magnetic pole is a region at each end of a magnet where the magnetic force is strongest. Magnets have two poles, north and south, which attract opposite poles of other magnets.

3. Observation with Different Objects

- When replacing the object with a nail: The nail will be attracted to the bar magnet because it is made of magnetic material.

- When replacing the object with a pencil: The pencil will not be attracted since it is not a magnetic material.

- When replacing the object with another bar magnet: The two magnets will either attract (if opposite poles are near each other) or repel (if like poles are near each other).

4. Explain a simple activity to observe the magnetic field. Draw suitable diagram.

- Answer: One way to observe the magnetic field is by placing a bar magnet under a sheet of paper and sprinkling iron filings on top. The filings will align themselves along the magnetic field lines, showing the field pattern around the magnet.

5. Following activity is performed to observe the strength of a magnet.

- Observation: If magnets A and B bear different numbers of nails, the one with more nails attached has a stronger magnetic field. This activity demonstrates that stronger magnets can hold a larger number of nails due to their increased magnetic strength.

6. Write 2 ways of damaging magnets.

- Answer:

- Dropping a magnet repeatedly can cause it to lose its magnetic properties.

- Heating a magnet to high temperatures can demagnetize it because heat disrupts the alignment of magnetic domains.

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