myUASARevision for UASA
More
My progress
Science questions, unit 5
Nama / NameKelas / ClassTarikh / Date

Preservation and conservation

36 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

8 marks
Choose the best answer for each question.
1

Question 1

What does extinct mean?
Show answerHide answer
B
Extinct means no longer existing on Earth.
For the teacher: Remembering, low difficulty, standard 5.1.3
Textbook p. 68
2

Question 2

Which animal is extinct?
Show answerHide answer
D
Dodo birds were hunted by sailors and their eggs were eaten by rats and cats. The others are endangered.
For the teacher: Remembering, low difficulty, standard 5.1.3
Textbook p. 68
3

Question 3

Farmers burn a forest to make way for new crops. Which factor threatens the animals and plants that live there?
Show answerHide answer
A
Burning forests destroys the habitat of the animals and plants that live there.
For the teacher: Understanding, low difficulty, standard 5.1.5
Textbook p. 72
4

Question 4

Which gas from factories and vehicles traps heat and causes global warming?
Show answerHide answer
C
Carbon dioxide forms a layer in the air that traps heat, so Earth becomes warmer.
For the teacher: Understanding, low difficulty, standard 5.1.5
Textbook p. 74
5

Question 5

Diagram 1 shows a forest before and after selective logging. Why is selective logging a method of preservation?
A forest before and after selective logging, with young trees left standing
Diagram 1
Show answerHide answer
B
Only selected trees are cut, and young trees are left to grow. This protects the habitat.
For the teacher: Understanding, low difficulty, standard 5.1.1
Textbook p. 75
6

Question 6

A centre trains young orangutans so they can survive when they are returned to the forest. This is an example of
Show answerHide answer
D
Orangutan rehabilitation centres return animals to their natural habitat. That is conservation.
For the teacher: Applying, medium difficulty, standard 5.1.2
Textbook p. 78
7

Question 7

Which action helps to preserve endangered animals?
Show answerHide answer
A
Boycotting products made from endangered species is a method of preservation.
For the teacher: Applying, low difficulty, standard 5.1.1
Textbook p. 76
8

Question 8

Reducing, reusing and recycling paper helps animals and plants because
Show answerHide answer
C
Less paper is needed from new trees, so there is less logging and less exploitation of natural resources.
For the teacher: Analysing, medium difficulty, standard 5.1.6
Textbook p. 80

Section B: structured questions

28 marks
Answer all questions. Circle the answer or write it in the space.
9

Question 9

Diagram 2 shows animals that once lived on Earth.
A Tasmanian wolf, a dodo bird and a mammoth
Diagram 2
[1 mark] (a)These animals are said to be extinct. What does extinct mean?
Show answerHide answer
Tick each point you got.
[1 mark] (b)State one reason why the dodo became extinct.
Show answerHide answer
Any 1 points
Tick each point you got.
For the teacher: Remembering, low difficulty, standard 5.1.3
Textbook p. 68
10

Question 10

Match each situation with the factor that threatens animals and plants.
[1 mark] (a)Oil spills from a ship kill fish and sea plants.
Show answerHide answer
Pollution
[1 mark] (b)Rafflesia is collected and sold as traditional medicine.
Show answerHide answer
Illegal hunting
[1 mark] (c)A landslide buries part of a forest.
Show answerHide answer
Natural disaster
For the teacher: Understanding, low difficulty, standard 5.1.5
Textbook p. 73
11

Question 11

Global warming is making Earth warmer.
Diagram of heat from the Sun trapped by gases from factories and vehicles
Diagram 3
[1 mark] (a)State one cause of global warming.
Show answerHide answer
Any 1 points
Tick each point you got.
[1 mark] (b)What happens to the ice at the North and South Poles?
Show answerHide answer
Tick each point you got.
[2 marks] (c)How does this threaten animals and plants along the coast?
Show answerHide answer
Tick each point you got.
For the teacher: Understanding, low difficulty, standard 5.1.5
Textbook p. 74
12

Question 12

Classify these methods as preservation or conservation.
[1 mark] (a)Enforcing laws to protect Malayan tigers
Show answerHide answer
Preservation
[1 mark] (b)Setting up a turtle sanctuary
Show answerHide answer
Conservation
[1 mark] (c)Planting seedlings where a forest was cleared
Show answerHide answer
Conservation
[1 mark] (d)Gazetting a marine park
Show answerHide answer
Preservation
For the teacher: Applying, low difficulty, standard 5.1.1
Textbook p. 75
13

Question 13

Answer these questions.
[1 mark] (a)State the meaning of preservation of animals and plants.
Show answerHide answer
Tick each point you got.
[1 mark] (b)State the meaning of conservation of animals and plants.
Show answerHide answer
Tick each point you got.
For the teacher: Remembering, low difficulty, standard 5.1.1
Textbook p. 75
14

Question 14

A forest ranger counted the elephants in forest X every year. Diagram 4 shows the results (practice numbers, not from the book).
Bar chart of elephants in forest X: 2015 50, 2016 40, 2017 30, 2018 40, 2019 50
Diagram 4
[1 mark] (a)How many elephants were there in 2017?
Show answerHide answer
Tick each point you got.
[1 mark] (b)State one observation from the chart.
Show answerHide answer
Any 1 points
Tick each point you got.
[1 mark] (c)Make an inference about why the number fell from 2015 to 2017.
Show answerHide answer
Any 1 points
Tick each point you got.
[1 mark] (d)Make an inference about why the number rose from 2017 to 2019.
Show answerHide answer
Any 1 points
Tick each point you got.
[2 marks] (e)Suggest two ways to stop the elephants from facing extinction.
Show answerHide answer
Any 2 points
Tick each point you got.
For the teacher: Analysing, medium difficulty, standard 5.1.6
Textbook p. 86
15

Question 15

Pangolins are hunted because some people believe their scales, meat and skin have medicinal properties. Pangolins are now endangered in Malaysia.
[1 mark] (a)Suggest one way of preservation to protect pangolins.
Show answerHide answer
Any 1 points
Tick each point you got.
[1 mark] (b)Suggest one way of conservation to help pangolins.
Show answerHide answer
Tick each point you got.
[2 marks] (c)Your friend says, "It is fine to buy pangolin products because pangolins are not extinct yet." Do you agree? Give a reason.
Show answerHide answer
Tick each point you got.
For the teacher: Evaluating, high difficulty, standard 5.1.1
Textbook p. 79
16

Question 16

A sustainable environment is our responsibility.
[1 mark] (a)State one importance of preservation and conservation.
Show answerHide answer
Any 1 points
Tick each point you got.
[2 marks] (b)Suggest two things you can do at home or at school to help the environment.
Show answerHide answer
Any 2 points
Tick each point you got.
For the teacher: Creating, medium difficulty, standard 5.1.7
Textbook p. 83