Kowloon Tong School (Secondary Section)
F.2 Integrated Science Quiz 11: WS9.3
Multiple Choice (5 marks)
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1
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2
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3
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4
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5
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D
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D
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B
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C
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C
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Fill in the Blanks (12 marks)
1 The Earth exerts a (1)force of gravity
on every object on or around it. It (2)pulls objects towards the (3)centre of the Earth.
2 The (4)weight
of an object on the Earth is the force of gravity exerted by the Earth on the
object. It can be (5)different when it is measured on different
celestial bodies.
3 The (6)mass
of an object is the amount of matter it contains. It is (7)the same in all places.
4 A 50 kg boy is weighing himself on planet X and the reading is 200N.
His mass on planet X is
(8)50kg and is (9)50kg
on the Earth. The force of gravity exerted by planet X
on him is (10)200N.
The force of gravity of planet X is (11)smaller
(larger/smaller) than that of
the Earth. His weight on planet X is (12)smaller (larger/smaller) than his weight on
the Earth.
Challenging
Questions (Bonus 2
marks)
He feels heavier in planet Y.
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