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Science questions, unit 8
Nama / NameKelas / ClassTarikh / Date

Absorption

30 marks. Use Practice to check each answer as you go, or Exam to answer everything first. Ask a grown-up to help you mark the written answers.

Section A: objective questions

13 marks
Choose the best answer for each question.
1

Question 1

Which object absorbs water?
Show answerHide answer
C
Tissue paper takes in water. The other objects do not.
For the teacher: Remembering, low difficulty, standard 8.1.1
Textbook p. 72
2

Question 2

Drops of coloured water stay on top of an object. What kind of object is it?
Show answerHide answer
A
Drops that stay on top show that the object does not absorb water.
For the teacher: Understanding, low difficulty, standard 8.1.1
Textbook p. 73
3

Question 3

Which object is non-water absorbent?
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D
A glass does not absorb water. The towel, mop and kitchen paper do.
For the teacher: Remembering, low difficulty, standard 8.1.2
Textbook p. 73
4

Question 4

Diagram 1 shows objects in a kitchen. Which one is water absorbent?
A kitchen with a straw, metal spoons, plastic plates, a glass, a door mat, a hand towel, kitchen paper and a mop
Diagram 1
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A
A door mat takes in water. Metal, plastic and a straw do not.
For the teacher: Applying, low difficulty, standard 8.1.2
Textbook p. 73
5

Question 5

Which object is water absorbent?
Coloured water, a dropper, notepad, handkerchief, tissue paper, rubber, coins, paper clip, cotton balls and a plastic toy
Diagram 2
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B
A cotton ball takes in water.
For the teacher: Applying, low difficulty, standard 8.1.2
Textbook p. 72
6

Question 6

Which group has only water absorbent objects?
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B
Hand towel, mop and kitchen paper all take in water.
For the teacher: Understanding, low difficulty, standard 8.1.2
Textbook p. 74
7

Question 7

Diagram 3 shows strips dipped in coloured water for 1 minute. Which strip absorbed the most water?
Strips of newspaper, kitchen paper and cloth are glued to a stick and dipped in coloured water
Diagram 3
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B
The kitchen paper absorbed the most water.
For the teacher: Understanding, medium difficulty, standard 8.1.3
Textbook p. 75
8

Question 8

What must be the same for all strips in the test?
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B
Strips of the same size make the test fair.
For the teacher: Applying, medium difficulty, standard 8.1.3
Textbook p. 75
9

Question 9

Why does father wipe his little son with a towel after a bath?
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A
A towel absorbs water, so it dries the body.
For the teacher: Remembering, low difficulty, standard 8.1.4
Textbook p. 76
10

Question 10

Which object is used to clean a wound?
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D
A cotton ball absorbs and wipes up liquid from a wound.
For the teacher: Applying, low difficulty, standard 8.1.4
Textbook p. 76
11

Question 11

Which object keeps the rain off us?
A man with a plastic umbrella and rubber boots walks in the rain; an iron barrel collects rain water
Diagram 4
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A
A plastic umbrella does not absorb water, so rain slides off.
For the teacher: Applying, low difficulty, standard 8.1.5
Textbook p. 78
12

Question 12

Why do we use an iron barrel to collect rain water?
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C
Iron does not absorb water, so the water stays inside the barrel.
For the teacher: Understanding, medium difficulty, standard 8.1.5
Textbook p. 78
13

Question 13

A mini mop is made with string. Why is string a good choice?
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D
The mop must soak up water, so the string must be water absorbent.
For the teacher: Applying, medium difficulty, standard 8.1.6
Textbook p. 79

Section B: structured questions

17 marks
Answer all questions. Circle the answer or write it in the space.
14

Question 14

Diagram 5 shows some objects. Alia tests each one with drops of coloured water.
Coloured water, a dropper, notepad, handkerchief, tissue paper, rubber, coins, paper clip, cotton balls and a plastic toy
Diagram 5
[1 mark] (a)Do the drops stay on top of the coin?
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Yes
[1 mark] (b)Is the handkerchief water absorbent or non-water absorbent?
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Water absorbent
[1 mark] (c)Name one more object in Diagram 5 that is non-water absorbent.
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Tick each point you got.
For the teacher: Applying, low difficulty, standard 8.1.2
Textbook p. 72
15

Question 15

Sort these objects: kitchen paper, glass, mop, metal spoon.
[2 marks] (a)Write the two water absorbent objects.
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Tick each point you got.
[2 marks] (b)Write the two non-water absorbent objects.
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Tick each point you got.
For the teacher: Understanding, low difficulty, standard 8.1.2
Textbook p. 74
16

Question 16

Diagram 6 shows three strips dipped in coloured water.
Strips of newspaper, kitchen paper and cloth are glued to a stick and dipped in coloured water
Diagram 6
[1 mark] (a)Which strip absorbed the most water?
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Tick each point you got.
[1 mark] (b)In the strip test with newspaper, kitchen paper and cloth, which strip absorbed the least water?
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Tick each point you got.
[1 mark] (c)Why must the three strips be the same size?
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Tick each point you got.
For the teacher: Analysing, medium difficulty, standard 8.1.3
Textbook p. 75
17

Question 17

Answer each question about water absorbent and non-water absorbent objects.
[1 mark] (a)Why do we use a towel after a bath?
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Tick each point you got.
[1 mark] (b)Why do we use a cloth for a wet jug?
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Tick each point you got.
[1 mark] (c)Rubber boots keep our feet dry because rubber ...
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does not absorb water
For the teacher: Understanding, low difficulty, standard 8.1.4
Textbook p. 76
18

Question 18

Hafiz makes a mini mop from string, thread, a pen and rubber bands.
[1 mark] (a)Why does he use string for the mop?
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Tick each point you got.
[1 mark] (b)Name one other material he can use instead of string.
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Tick each point you got.
[2 marks] (c)Would plastic strips be a good choice? Say why.
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Tick each point you got.
For the teacher: Creating, medium difficulty, standard 8.1.6
Textbook p. 79