science 6 4q

8/7/2019 Science 6 4q

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SCIENCE 6 – 4Q1

DIRECTIONS: RING THE LETTER OF THE CORRECT ANSWER.

I. ENVIRONMENT

1. Kumar and his friends would like to visit a place where they could see mudskippers, treeclimbing crabs, fiddler crabs and some migratory birds during a certain period of the year.

What would this habitat most likely to be?

A. Tropical rainforest

B. Mangrove swamp

C. Freshwater lake

D. Seashore

2. The diagram below shows five populations of plants P, Q, R, S and T in a pondcommunity.

What will happen when Plant Q multiplies quickly?

A. Only Plant T will grow well.

B. The other 4 plants will not be affected.

C. Only Plant T and Plant R will not grow well.

D. Only Plant S and Plant P will not grow well.

1 MCQs are from www. oldschool.com.sg

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3. Matthew wants to conduct a fair test to determine whether the amount of sunlight

affects the amount of oxygen produced by water plants. He sets up his experiment as

shown below.

Which of the following variables should be different in Set up A and B in this experiment?

A. amount of baking soda added to the plants

B. amount of water in the beakers

C. amount of sunlight available to the plants

D. type of water plants used

4. Elyon studied about the leaf litter community in school. He set up four containers fo leaf

litter, W, X, Y and Z, of the same size and left them in 4 different places. The following table

shows the condition in each container of leaf litter.

Containerof

leaf litterLocation Temperature

Condition inthe

leaf litter

WUnder a

saga tree25C Damp

XOn a

carpark floor30C Dry

YIn a school

field

36C Damp

ZBeside a

window28C Dry

In which container do you think Elyon will find the greatest number of populations of

animals after two months?

A. W

B. X

C. Y

D. Z

5. Shanti set up an aquarium near the window. It consists of five fishes and some water

plants.

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Two days later, she placed one Organism F into the aquarium. After one week, Shanti saw

six dead bodies floating in the aquarium. The water plants were still growing healthily.

Which one of the following best explains this observation?

A. Organism F is a carnivore

B. There was no oxygen in the tank

C. There was too much water in the aquarium

D. Organism F had a disease and it infected the fishes too

6. During a Science lesson, Terry learned that to slow down the decomposition of food, he

needed to make the condition in the environment unsuitable for decomposers to live in.

He placed an equal amount of bread in each of the 4 containers, A, B, C and D, each kept in

different conditions as shown below.

Which container, A, B, C or D, has the BEST condition to slow down the decomposition of

bread?

A. A

B. B

C. C

D. D

II. WEB OF LIFE

1. Observe the food chain below.

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Vegetable → caterpillar → chicken → eagle

The population of eagles over a period of two years is represented by the following graph:

Which of the following show how the other popolations are affected?

A: a decrease in the vegetable population

B: a decrease in the chicken population

C: an increase in the caterpillar population

D: a decrease in the caterpillar population

A. A and D

B. B and C

C. A and C

D. A, B and C

2. In the food web shown below, P, Q, R, S and T represent animals.

Which one of the following shows how the populations of P, Q, R and T are likely to be

affected immediately if there is a decrease in the population of S in a habitat?

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A.

B.

C.

D.

3. Which of the following factors below will lead to an increase in the size of an organism's

population?

A: Abundance of food

B: Predation

C: Diseases

D: High birth rate

E: Sufficient water

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A. A and D only

B. B and C only

C. A, D and E only

D. A, B, C, D and E

4. During a Science lesson, Terry learned that to slow down the decomposition of food, he

needed to make the condition in the environment unsuitable for decomposers to live in.

He placed an equal amount of bread in each of the 4 containers, A, B, C and D, each kept in

different conditions as shown below.

Which container, A, B, C or D, has the BEST condition to slow down the decomposition of

bread?

A. A

B. B

C. C

D. D

5. The following animals are classified according to the food they eat.

From the information given above, what can you tell about Animal B?

A. It feeds only on small insects.

B. It does not feed on plants.

C. It feeds on both plants and animals.

D. It does not prey on other animals.

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6. The diagram below shows a food web.

Choose the set of organisms from the following table that can be correctly used to completethe food web.

W X Y Z

(1) grasshopper frog lizard woodlouse

(2) earthworm caterpillar frog mynah

(3) caterpillar ladybird spider sparrow

(4) grasshopper ladybird millipede praying mantis

A. (1)

B. (2)

C. (3)

D. (4)

III. ADAPTATION

1. The Tasmanian tigers have become extinct due to various environmental factors. Whichof the following are most likely the factors to cause the extinction of this animals?

A: The Tasmanian tigers were predators of many animals.B: The Tasmanian tigers were once widely hunted and poached.

C: The Tasmanian tigers were wiped out by outbreak of epidemic.

D: The Tasmanian tigers were not able to adapt to climate changes.

A. A and B only

B. C and D only

C. A, B and D only

D. B, C and D only

2. Which of the following statement(s) describe(s) behavioral adaptation?

A: Eats a lot to generate body heat.

B: Bones of some organisms are hollow to reduce body weight.

C: Streamlined body of some organisms to reduce air or water resistance.

A. A only

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B. A and B only

C. B and C only

D. A, B and C only

3. Animals and plants have different adaptations that help them to survive in their natural

habitats. Which one of the following correctly states the structural and behaviouraladaptations of the organism mentioned?

Organism Structural Behavioural

1. Polar bearHas white thick fur to blend into the

surroundingsCover his black nose with his paws when

resting

2. Lizard Drops its tail when attackedHas a flat body to allow it to move

through small openings

3. Bird

Has hollow bones to make its body

lighter for flight Has long wingspan for flight

4. Plants Fruits dispersed by water has huskFruits dispersed by wind has wing-like

structure

A. 1

B. 2

C. 3

D. 4

4. The diagram shows a type of sea grass that is found along the sea shore.

Which one of the following starfish is most easily spotted by its predator when it is near thisseagrass?

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A.

B.

C.

D.

5. The picture below shows a plant in the swamp community.

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What is the plant part labelled X adapted for?

A. It carries out photosynthesis.

B. It takes in moisture.

C. It traps sunlight.

D. It takes in air.

6. Frogs have the ability to live both on land and in water. Which of the adaptations enable

them to do so?

A They can trap air bubbles in their throat.

B They have gills to help them breathe in water.

C They have lungs to help them breathe when they are on land.

D Their skin, when kept moist, can take in the air dissolved in the water.

A. A and B only

B. B and C only

C. A and C only

D. C and D only

7. Which of the following structural adaptations enable the camel to live in a desert?

A It has thick-padded feet.B It stores water in its hump.

C It has stiff hair on its soles.

D It has long, thick eyelashes.

A. A and B only

B. A and D only

C. B and C only

D. C and D only

IV. MAN AND HIS ENVIRONMENT

1. Which of the following activities have a negative impact on the environment?

A: Burning of fossil fuels.

B: Burning trees in the forest.

C: Farming using weedkillers

D: Increasing the use of chlorofluorocarbons (CFC).

A. A, B and C only

B. A, C and D only

C. B, C and D only

D. A, B, C and D

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2. The graph below shows how the amount of insecticide used can affect the number of

fruits harvested. Based on the graph, which of the following statements are true?

A: The number of fruits obtained increased when less insecticide is used.

B: The number of fruits obtained keeps on increasing when more insecticide was used.

C: Lesser fruit is obtained when too little insecticide is used.

D: When too much insecticide is used, the number of fruits obtained is less.

A. A and B only

B. A and C only

C. B and D only

D. C and D only

3. Which of the following are harmful effects of deforestation?

A: Soil erosion

B: Global warming

C: Loss of habitats

D: Thinning of ozone layer

A. A, B and C only

B. A, B and D only

C. A, C and D only

D. B, C and D only

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4. The diagram below shows some human activities which affect the environment.

Based on the diagram, what are the activities that cause air pollution?

A. A and B onlyB. A, D and F only

C. B, C and D only

D. B, C and E only

5. Study the statements below carefully.

A: Coal is a renewable resource.

B: Greenhouse effect will cause skin cancer.

C: The main cause of acid rain is deforestation.D: The burning of fuels causes the greenhouse effect.

Which of the statements above are false?

A. A and B only

B. A and C only

C. B and D only

D. A, B and C only

6. Which one of the following statements about fossil fuels is NOT true?

A. They contain chemical energy.

B. They are found in the ground.

C. Burning of fossil fuels causes air pollution.

D. The usage of fossil fuels causes the depletion of the ozone layer.

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Answer Key

I. ENVIRONMENT

1. B

2. C

3. C4. A

5. D

6. B

II. WEB OF LIFE

1. D

2. B

3. C

4. B

5. B

6. C

III. ADAPTATION

1. D

2. A

3. A

4. B

5. D

6. C

7. B

IV. MAN AND HIS ENVIRONMENT

1. D

2. D3. A

4. D

5. D

6. D

science 6 4q

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