Hint: Outline the events responsible for the discovery of natural magnets.
Question.1. Which of these events is responsible for the discovery of natural magnets?
(a) A lightning strike on land
(b) Shaking of the Earth surface
(c) Rocks attracting pieces of iron
(d) Bigger rocks breaking into smaller pieces
Question.2. A shepherd takes his herd of sheep for grazing in a region with rocks, trees and long stretches of grassland. He used a stick that had a small iron piece attached at one end to control the herd. One day he noticed that the iron in the stick was attracted to a part of the rock. Which of these events explain the presence of a natural magnet?
(a) The herd of a sheep grazing on grass
(b) Using a stick to control the herd of sheep
(c) The stick being attracted to a part of a rock
(d) Attaching a piece of iron to one end of a stick
Hint: Classify given substances as magnetic & non-magnetic based on their ability to be attracted by magnets.
Question.3. The table list a few substances.Which of these substances are likely to be attracted to a magnet?
(a) Nail and Pencil
(b) Eraser and Pencil
(c) Nail and Safety pin
(d) Plastic Ruler and Pencil
Question.4. A student performs an activity to separate some objects without handpicking them. The mixture contains a few substances listed in the table.He brought a large piece of magnet close to the mixture. He noticed that drawing pins and coins stuck to it the magnet. Which option correctly classifies the objects based on their property?
(a) (b) (c) (d)
Hint: Suggest an activity to determine the poles of a magnet.
Question.5. A student has a bar magnet where the poles are not labelled. He wants to determine the poles of the magnet. Which option would help in identifying the poles of the magnet?
(a) Heating the piece of magnet
(b) Rubbing it against a piece of iron
(c) Taking it close to a magnetic compass
(d) Placing it horizontally above a piece of paper
Question.6. A student performs an activity where a labelled bar magnet is suspended using a thread. He brought another bar magnet where the poles are not marked. As he took it near the north pole of the suspended bar magnet, he noticed that it moved away.Which pole of the magnet was held closer to the suspended magnet?
(a) North pole as like pole always repels
(b) South pole as unlike pole always repel
(c) North pole as like pole always attract each other
(d) South pole as unlike poles always attract each other
Hint: Create a set up using magnet in order to find the direction.
Question.7. The image shows a magnetic compass with its needle pointing in a certain direction.Which direction is generally indicated by the compass of a magnetic needle?
Question.8. A group of students on a trekking trip understands that they must continue travelling east to reach the destination. To understand the direction, they used a magnetic needle inserted in cork and placed in on a bowl of water. After sometime, the needle settled in a certain direction as shown in the image.Which direction should the group of students travel to reach their destination?
(a) Towards the pointed direction
(b) Opposite to the pointed direction
(c) To the left of the pointed direction
(d) To the right of the pointed direction
Hint: Make a magnet in order to demonstrate how artificial magnets can be created.
Question.9. Which of these materials can be used to create an artificial magnet?
Question.10. A student requires two magnetic substances for a science project. He could find only one magnet and thus he decided to make another magnet from it. Which of these processes could be followed to create an additional magnet?
(a) Placing a piece of cardboard above the magnet
(b) Placing the nail close to a magnet without touching it
(c) Take a piece of iron nail and rub it repeatedly on the magnet
(d) Wrapping a piece of plastic around the magnet for a few hours
Hint: Analyse what happens when two magnets are placed together in order to conclude the property of magnet.
Question.11. A student conducts an experiment where he places some magnets in a different order as shown in the image.Which of these can be concluded based on the observation?
(a) All poles repeal
(b) All poles attract
(c) Opposite poles attract
(d) Opposite poles repeal
Question.12. A student performs an activity where a bar magnet is suspended. Another bar magnet is held and moved close to it as shown in the image.Which of these statements can be concluded based on the activity?
(a) A magnet always repels other magnets
(b) Like poles of magnet always repel each other
(c) A bar magnet repels all other substances except iron
(d) North poles of a magnet always repels the south pole