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Science questions, unit 3
Nama / NameKelas / ClassTarikh / Date

Animals

45 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

10 marks
Choose the best answer for each question.
1

Question 1

Which animal breathes using gills?
Show answerHide answer
C
A prawn lives in water and breathes with gills. A cat uses lungs, a caterpillar uses spiracles and a leech uses moist skin.
For the teacher: Remembering, low difficulty, standard 3.1.1
Textbook p. 56
2

Question 2

Look at Diagram 1. Which animal breathes in the same way as the leech?
A cow, chicken, grasshopper, dragonfly, worm, leech, crab and fish with their breathing organs shown
Diagram 1
Show answerHide answer
B
A leech breathes through its moist skin, just like a worm. The cow and chicken use lungs and the crab uses gills.
For the teacher: Understanding, low difficulty, standard 3.1.1
Textbook p. 54
3

Question 3

Which animal breathes through spiracles?
Show answerHide answer
A
Insects such as butterflies breathe through spiracles.
For the teacher: Understanding, low difficulty, standard 3.1.2
Textbook p. 56
4

Question 4

When does a frog breathe using its moist skin?
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D
In water a frog breathes with its moist skin. On land it uses its lungs.
For the teacher: Understanding, medium difficulty, standard 3.1.3
Textbook p. 57
5

Question 5

Which animal is an invertebrate?
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C
A mosquito has no backbone. A horse, a bird and a tortoise are vertebrates.
For the teacher: Remembering, low difficulty, standard 3.2.1
Textbook p. 59
6

Question 6

Which statement about vertebrates is correct?
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A
Vertebrates are animals with a backbone. They live in different habitats and mammals give birth.
For the teacher: Understanding, low difficulty, standard 3.2.1
Textbook p. 58
7

Question 7

A whale lives in the sea. Why is it classified as a mammal?
Show answerHide answer
B
A whale gives birth to its young and breathes with lungs, so it is a mammal.
For the teacher: Understanding, medium difficulty, standard 3.2.3
Textbook p. 60
8

Question 8

Which group of vertebrates has moist skin as its body covering?
Show answerHide answer
C
Amphibians such as frogs have moist skin.
For the teacher: Remembering, low difficulty, standard 3.2.3
Textbook p. 60
9

Question 9

A bat can fly, but it is not classified as a bird. Why?
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D
A bat gives birth and has fine hair, like other mammals. Birds have feathers and lay eggs.
For the teacher: Analysing, medium difficulty, standard 3.2.3
Textbook p. 61
10

Question 10

Animal Z has these characteristics. Which class is animal Z?
Breathing organReproductionBody coveringHabitat
LungsLays eggsScalesMostly on land
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D
Lungs, eggs, scales or hard shell and living mostly on land are the characteristics of reptiles, such as a crocodile.
For the teacher: Applying, medium difficulty, standard 3.2.3
Textbook p. 66

Section B: structured questions

35 marks
Answer all questions. Circle the answer or write it in the space.
11

Question 11

Diagram 2 shows some animals. Choose the breathing organ of each animal.
A cow, chicken, grasshopper, dragonfly, worm, leech, crab and fish
Diagram 2
[1 mark] (a)Chicken
Show answerHide answer
Lungs
[1 mark] (b)Dragonfly
Show answerHide answer
Spiracles
[1 mark] (c)Crab
Show answerHide answer
Gills
[1 mark] (d)Leech
Show answerHide answer
Moist skin
For the teacher: Remembering, low difficulty, standard 3.1.1
Textbook p. 54
12

Question 12

Classify these animals by their breathing organs.
[1 mark] (a)Goat
Show answerHide answer
Lungs
[1 mark] (b)Prawn
Show answerHide answer
Gills
[1 mark] (c)Land leech
Show answerHide answer
Moist skin
[1 mark] (d)Ant
Show answerHide answer
Spiracles
For the teacher: Understanding, low difficulty, standard 3.1.2
Textbook p. 56
13

Question 13

A frog and a fish live in a pond.
[2 marks] (a)State the two breathing organs of an adult frog.
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Tick each point you got.
[1 mark] (b)Which organ does the frog use when it is in the water?
Show answerHide answer
Moist skin
[1 mark] (c)Why can the fish not live on land?
Show answerHide answer
Tick each point you got.
For the teacher: Applying, medium difficulty, standard 3.1.3
Textbook p. 57
14

Question 14

Hana watches a tadpole grow into a frog in a tank.
[1 mark] (a)State the breathing organ of the tadpole.
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Tick each point you got.
[1 mark] (b)State the breathing organ(s) of the adult frog.
Show answerHide answer
Tick each point you got.
[1 mark] (c)Why can the adult frog live in two habitats?
Show answerHide answer
Tick each point you got.
For the teacher: Understanding, low difficulty, standard 3.1.4
Textbook p. 57
15

Question 15

Answer these questions about backbones.
[1 mark] (a)What is a vertebrate?
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Tick each point you got.
[1 mark] (b)Fish
Show answerHide answer
Vertebrate
[1 mark] (c)Bee
Show answerHide answer
Invertebrate
[1 mark] (d)Tortoise
Show answerHide answer
Vertebrate
For the teacher: Remembering, low difficulty, standard 3.2.1
Textbook p. 58
16

Question 16

Tortoise, centipede, starfish, caecilia, tiger and grasshopper are sorted into two groups.
[3 marks] (a)Write the three animals that are vertebrates.
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Tick each point you got.
[3 marks] (b)Write the three animals that are invertebrates.
Show answerHide answer
Tick each point you got.
For the teacher: Analysing, medium difficulty, standard 3.2.2
Textbook p. 59
17

Question 17

Name the class of each vertebrate.
[1 mark] (a)Goose
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Bird
A goose has feathers and lays eggs.
[1 mark] (b)Toad
Show answerHide answer
Amphibian
A toad has moist skin and lives on land and in water.
[1 mark] (c)Crocodile
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Reptile
A crocodile has scales and lays eggs.
For the teacher: Applying, low difficulty, standard 3.2.3
Textbook p. 66
18

Question 18

Amir says, "A whale lives in water and swims, so it is a fish."
[1 mark] (a)Is Amir correct?
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No
[2 marks] (b)Give two reasons.
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Any 2 points
Tick each point you got.
For the teacher: Evaluating, high difficulty, standard 3.2.3
Textbook p. 60
19

Question 19

A platypus is a unique mammal that spends most of its time in water.
[1 mark] (a)Which characteristic of the platypus is unusual for a mammal?
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Tick each point you got.
[1 mark] (b)Why is it still classified as a mammal?
Show answerHide answer
Tick each point you got.
For the teacher: Evaluating, medium difficulty, standard 3.2.3
Textbook p. 61
20

Question 20

A zoologist finds a new animal in a forest. It is not a mammal, bird, fish, reptile or amphibian.
[1 mark] (a)What group could the animal belong to?
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Tick each point you got.
[1 mark] (b)Which body part would you check to be sure?
Show answerHide answer
Tick each point you got.
For the teacher: Creating, high difficulty, standard 3.2.4
Textbook p. 65