Grade 7 Integrated Science – Magnetism Quiz
1. Define magnetism.
2. We can we not find magnets?
3. Which one is a magnetic material?
4. Which one is a non-magnetic material?
5. A magnet has ...... and ..... poles.
6. Which of the following is not a use of magnets?
7. What do the lines around a magnet represent?
8. As the distance between two magnets increases (they get farther apart), the force between them........
9. If you cut a magnet in half, what happens to the poles?
10. Magnetic field strength is maximum at ......
11. If a glass plate is placed over a magnet and iron filings are sprinkled over the glass, a pattern will be visible. What does this pattern indicate?
12. The force of magnetism is stronger when magnets are ________________
13. Magnetism is....
14. What characteristics do magnetic substances have?
15. Which of the following is true of a bar magnet?
16. The strongest parts of the magnet are ...
17. What is the purpose of a compass?
18. Like poles of a magnet do what?
19. What device makes a fan plugged into the wall spin?
20. What is the property of attracting iron and some other materials?
Magnetism is the property of attracting iron and some other materials.
21. What force is responsible for the attraction or repulsion of magnets?
The attraction or repulsion of magnets is due to the magnetic force.
22. What is the region around a magnet where magnetic materials are affected?
The region around a magnet where magnetic materials are affected is called the magnetic field.
23. What is the SI unit of magnetic field strength?
The SI unit of magnetic field strength is the Tesla.
24. What happens when you cut a magnet into two pieces?
When you cut a magnet into two pieces, one piece will remain a magnet while the other loses its magnetism.
25. What type of poles attract each other?
South and North poles attract each other.
26. What happens when similar poles of magnets are brought close to each other?
Similar poles of magnets repel each other.
27. What is the phenomenon where a material acquires magnetism when placed in a magnetic field?
The phenomenon where a material acquires magnetism when placed in a magnetic field is called magnetic induction.
28. In which direction does a compass needle always point?
A compass needle always points towards the North pole.
29. What material is commonly used to make permanent magnets?
Steel is commonly used to make permanent magnets due to its magnetic properties.
30. What is the property of a material that enables it to attract iron objects?
Magnetism is the property of certain materials that enables them to attract iron objects. Materials with this property are called magnets.
31. Which of the following is NOT a type of magnet?
Electric is not a type of magnet. Temporary, Permanent, and Electromagnet are all types of magnets based on their properties and how they are formed.
32. What is the area around a magnet where its magnetic force is felt the strongest known as?
The area around a magnet where its magnetic force is felt the strongest is called the magnetic field. It is an important concept in understanding how magnets work.
33. Which of the following materials is NOT attracted to magnets?
Copper is not attracted to magnets. On the other hand, iron, nickel, and cobalt are materials that can be easily attracted to magnets due to their magnetic properties.
34. What happens when you break a magnet into two parts?
When a magnet is broken into two parts, each part becomes a magnet with its own north and south poles. This is due to the alignment of the magnetic domains within the material.
35. Which of the following devices uses magnetism to generate electricity?
A generator is a device that uses magnetism to generate electricity. It works on the principle of electromagnetic induction, where a coil of wire spins within a magnetic field to produce an electric current.
36. What is the SI unit of measurement for magnetic field strength?
The SI unit of measurement for magnetic field strength is the Tesla. It is named after the famous inventor Nikola Tesla and is used to quantify the strength of magnetic fields.
37. Which of the following magnets can be turned on and off?
A temporary magnet can be turned on and off by controlling the current flowing through it. Unlike permanent magnets, temporary magnets do not retain their magnetism once the current is turned off.
38. What does the Earth's magnetic field help protect us from?
The Earth's magnetic field helps protect us from solar wind, which is a stream of energized particles emanating from the Sun. It deflects these particles away from the Earth, preventing them from harming life on our planet.
39. Which of the following objects would NOT be affected by a nearby magnet?
A wooden stick would not be affected by a nearby magnet as wood is not a material that can be magnetized or attracted to magnets. The other objects mentioned (paper clip, plastic ruler, iron nail) can be affected by a nearby magnet due to their magnetic properties.