Magnets
A. Label the different types of magnets using tlhe drop-down option in the box.(6 marks)
B. We con use magnet for many ways. Use the drop-down option to state how magnet is used
for each item below.
i. compass
ii. credit card
iii. speaker
C. Fill
in the blanks by dragging the word and drop it into the correct box.
iron
unlike
Lodestone
nickel
like
end
steel
North-South
attract
cobalt
repel
1. Magnets are made from ------2. Not all metals are magnetic. some metals that can attract to magnet are -------J
3. When a magnet is hung freely and come to rest (stop moving) it will point to the
--------- direction.
4. When two _____ poles are brought together, they push each other away. They will
----- each other.
5. When two _____ poles are brought together, they pull each other together. They will
----- each other.
6. The strongest part of a magnet is at the _____ of both poles.
D. Fill in the blanks by dragging the word and drop it into the correct box.
i.
ii.
THEME 2 - ENERGY AND FORCES (MAGNET)
l. Study the picture below and answer the following questions.
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Magnet B
Magnet A
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Magnet C
a. How many paper clips that are attracted to these magnets?
(i)
Magnet A: ________ paper clips
(ii)
Magnet B: _______ paper clips
(iii)
Magnet C: ________ paper clips
b. The three magnets are of the same size and shape.
(i) Which magnet holds the greatest number of paper clips? ________
(ii) Which magnet holds the least number of paper clips? ________
(iii) Which magnet is the strongest? ________
(iv)Which magnet is the weakest? ________
c. To make sure a fair test, which of the following variables should be keep the same
throughout the experiment? Choose "Yes" or "No" for each statement.
Variable
Size of the magnet
Different size of the paper clips
The type of magnet
Keep the same
2. Study Figure 1 below. Label the poles of the magnet in Picture A to indicate like poles
and in Picture B to indicate unlike poles.
Picture A (like poles)
Picture B (unlike pole.s)
Figure 1
a. What happens when the two like poles in Picture A in figure 1 are brought closer?
The magnets will
b. What happens when the two unlike poles in Picture B in figure 1 are brought closer?
The magnets will
c. Figure 2 below shows two ways of making temporary magnet. Name the two methods of
making temporary magnet on Figure 2 below.
Picture B
Picture A
iron najl
)
Iron nail
coil of insulated wire
Magnetism Test
1. Which of the following are magnetic poles ?
a) north and south
b) east and west
c) red and blue
2. Which of the following is not a magnetic material ?
a) steel
b) cobalt
c) aluminium
3. What do two like poles do when they are brought close together ?
a) they attract
b) they repel
c) they make an electric current flow
4. What do two unlike poles do when they are brought close together ?
a) they attract
b) they repel
c) they make an electric current flow
5. In which direction do the field lines go around a bar magnet ?
a) from south to north
b) from north to south
c) from left to right
6. Where are the fields most concentrated around a bar magnet ?
a) at both poles
b) in the middle
c) at the north pole only
7. Why does the Earth have a magnetic field ?
a) it contains a giant bar magnet
b) so we know which way is north
c) it contains a core of iron and nickel
8. How can we increase the strength of an electromagnet ?
a) add an iron core
b) reduce the number of turns on the coil
c) reduce the current in the coil
9. One of the difference between electromagnets and bar magnets is ?
a) bar magnets can be turned off but electromagnets cannot
b) bar magnets have a magnetic field but electromagnets do not.
c) electromagnets need electricity but bar magnets do not.