1 SCIENCE 6 – 4Q 1 DIRECTIONS: RING T HE LETTER OF THE CORRECT ANSWER. I. ENVIRONMENT 1. Kumar and his friends would like to visit a place where they could see mudskippers, tree climbing crabs, fiddler crabs and some migratory birds during a certain period of the year. What would this habitat most likely to be? A. Trop ical rain fores t B. Mangr ove swamp C. Freshwater lake D. Seashore 2. The diagram below shows five populations of plants P, Q, R, S and T in a pond community. What will happen when Plant Q multiplies quickly? A. Only P lant T will gr ow wel l. B. The other 4 plants will not be affected. C. Only Plant T and Plant R will not g row well. D. Only Plant S and Plant P will not grow well. 1 MCQs are from www. oldschool.com.sg
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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.
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.