2012 Primary 3 Science End Year Examination 2

Section A

For each question from 1 to 30, four options are given. One of them is the correct answer. Make your choice (1, 2, 3 or 4).

1.

Ethan made a visit to his school pond and noticed some tadpoles as shown below. After a few months, he made a visit to the school pond again and noticed that the tadpoles were no longer there. However, he noticed that frogs have made the pond their home.

What do you think could have happened to the tadpoles? They ____________.

1. died
2. grew
3. drowned
4. reproduced

2.

During the holidays, Victor was tasked to clean his fish tank by his parents. He decided to transfer his fish to a plastic container before cleaning the tank. He filled the plastic container with enough water and food. He then enclosed it tightly with a plastic lid. Four hours later, he realized that his fish had died.

What could be the main reason that Victor's fish died? It did not get enough ____________.

1. air
2. light
3. food
4. water

3.

Which one of the following does not show that living things respond to changes?

1. A healthy man exercising in the gymnasium.
2. A millipede curling into a tight ball upon touch.
3. A Venus Flytrap closing its leaves to trap small animals.
4. Zebras running away from hyenas which are hunting for food.

4.

The graph below shows the number of hamsters in a cage over twelve months.



Based on the data above, what conclusion can you draw about the hamsters? They ______________________________________.

1. are mammals that live on land
2. reproduced during the 12 months
3. need air, food and water to survive
4. grew bigger in size only for 4 months

5.

An owl, goose and a lionfish have one similarity. They __________________________.

1. lay eggs
2. live in water
3. have a tail and fin
4. have feathers as an outer covering

6.

Sean observed two animals, Animal X and Animal Y. He recorded his observations in the table below.

Observations	Animal X	Animal Y
Breathe with gills	No	Yes
Has three body parts	Yes	No
Has two antennae	Yes	No

	Animal X	Animal Y
(1)	Fly	Kingfisher
(2)	Bee	Clownfish
(3)	Spider	Clownfish
(4)	Dragonfly	Kingfisher

1. 1
2. 2
3. 3
4. 4

7.

Below are some descriptions of an animal.

• Have wings and can fly
• Feeds young with milk
• Gives birth to young alive

Which one of the following animal fits the description above?

1. Bat
2. Emu
3. Seal
4. Penguin

8.

Sam caught two animals, a ladybug and a beetle. He wanted to find out if they are insects. Which of the following test(s) should he conduct to find out if these animals are insects?

A: Check if the animal has 3 body parts.
B: Count the number of legs the animal has.
C: Count the number of wings the animal has.
D: Check if the animal has a hard body covering.

1. B only
2. B and C only
3. A, B and D only
4. A, B, C and D

9.

The picture below shows a Bird's Nest fern.

Why does the Bird's Nest fern have large leaves?

1. To take in more water.
2. To take in more sunlight.
3. To make more new plants.
4. To help to make more flowers.

10.

The diagram below shows a plant growing healthily in the garden. Matthew waters the plant daily and adds fertilizer to the plant regularly.

Which of the following statement(s) is/are correct?

1. A only
2. B only
3. B and C only
4. A, B and C

11.

Which one of the following about fungi is true? It ____________________________________.

1. lives in water
2. reproduces by seeds
3. can make its own food
4. feeds on other living things or decaying things

12.

Study the classification table below. Which one of the following has been grouped incorrectly?

	Flowering plants	Non-flowering plants	Fungi
(1)	Lantana and Rice	Pine and Moss	Yeast and Bracket fungus
(2)	Coconut palm and Orchid	Tree fern and Sword fern	Mould and Puffball
(3)	Rice and Mimosa	Lantana and Pine	Mushroom and Puffball
(4)	Coconut palm and Rice	Pine and Moss	Mould and Bracket fungus

1. 1
2. 2
3. 3
4. 4

13.

Ben went on a hike and came across a fern. He plucked off a few leaves and looked at the underside of the fern leaves. He noticed a lot of brown lines on the underside of the fern leaves.

What could be the brown lines he observed on the fern leaves?

1. fungi
2. seeds
3. mould
4. spores

14.

Christine got wet in the rain while returning home from a party. She quickly put her clothes to wash and put away her leather handbag in her cupboard. A month later, she decided to use the bag and took it out from her cupboard. She then discovered some powdery patches growing all over her handbag.

What could the powdery patches observed on the bag be?

1. Dirt
2. Fern
3. Mould
4. Bacteria

15.

Mrs Chan decided to hold a birthday party for her 6 year old daughter. She invited her daughter's kindergarten school friends too. She decided to buy some new plates to use for the party.
What type of plate(s) should she buy?

A: Glass plates
B: Paper plates
C: Plastic plates
D: Ceramic plates

1. B only
2. C only
3. B and C only
4. A, B, C and D

16.

Study the flowchart below.

Which one of the following could A and B represent?

	A	B
(1)	Mould	Bracket Fungus
(2)	Ixora	Clover
(3)	Bracket Fungus	Mangrove
(4)	Clover	Mould

1. 1
2. 2
3. 3
4. 4

17.

Sandy listed four objects and the materials they are made from as shown in the table below. Which one of the following objects did Sandy match wrongly?

	Object	Material
(1)	Tyre	Rubber
(2)	Brick	Ceramic
(3)	Cutting board	Wood
(4)	Ice-cream stick	Glass

1. 1
2. 2
3. 3
4. 4

18.

The graph below shows the strength of 4 different types of paper, (cardboard, tissue paper, drawing block and foolscap paper).

Which one of the following could material C be?

1. Cardboard
2. Tissue paper
3. Drawing block
4. Foolscap paper

19.

What is the most important property a vaulting pole should have?

1. Strength
2. Flexibility
3. Hardness
4. Ability to float

20.

Mr and Mrs Tan were choosing a material for their kitchen cupboards. The carpenter allowed them to do a scratch test on four different types of materials. A, B, C and D. They used four objects namely, iron nail, plastic spoon, fingernail and a wooden ruler to scratch each piece of material. They then recorded the observations in the table below.

Can be scratched using a/an

Material	Iron nail	Plastic spoon	Fingernail	Wooden ruler
A	Yes	Yes	Yes	Yes
B	No	Yes	Yes	Yes
C	No	No	Yes	No
D	No	No	No	No

Based on the results, which material do you think is most suitable for making the kitchen cupboards?

1. A
2. B
3. C
4. D

21.

Karen cut a strip from four different materials, (W, X, Y and Z). Each strip was of equal size. The strips were hung from a stand such that their tips dipped into the container of coloured water.
The diagram below shows the material strip after three hours. The shaded areas represent the parts stained by the coloured water.

Which material will be most suitable to make a rain coat?

1. W
2. X
3. Y
4. Z

22.

Study the flowchart below.

What could S, T and U represent?

	S	T	U
(1)	Silk	Rubber	Wood
(2)	Cotton	Silk	Rubber
(3)	Wood	Wool	Silk
(4)	Wool	Wood	Metal

1. 1
2. 2
3. 3
4. 4

23.

Adam was enjoying his dinner with his family. Suddenly, he held onto his neck and started coughing. He looked as if he was gasping for air.
What do you think might have caused this? His food had entered the _________________ accidentally.

1. nose
2. gullet
3. windpipe
4. blood vessels

24.

Which one of the following graphs correctly shows the heartbeat readings for the different activities below?

1. 
2. 
3. 
4. 

25.

Esther had fun swinging and bending her body parts during her dance practice.

Which body system(s) worked together during her dance practice?

A: Skeletal system
B: Muscular system
C: Circulatory system
D: Respiratory system

1. A only
2. A and B only
3. B and C only
4. A, B, C and D

26.

Ann did not pass motion for two days. On the third day, her mother decided to bring her to the doctor. The doctor said she had constipation. He further explained that this was because her wastes were hard and dry.

Which system in her body was in trouble?

1. Skeletal System
2. Muscular System
3. Circulatory System
4. Digestive System

27.

The picture below shows a plant.

What would happen to the plant if we cut away its roots? The plant will not be able to _________________________________________.

1. make food for the plant
2. trap sunlight for the plant
3. take in water and nutrients from the soil
4. transport water to various parts of the plant

28.

Different parts of a plant are eaten as food. Which one of the following incorrectly shows the part of the plant that is eaten?

	Plant	Part
(1)	Potato	Stem
(2)	Carrot	Root
(3)	Beetroot	Root
(4)	Sweet potato	Stem

1. 1
2. 2
3. 3
4. 4

29.

Su Mei conducted an experiment using the stem of a plant. She mixed some red colouring with water in a beaker. She then placed the stem into a beaker as shown below. She left it aside for 2 days. On the third day, she discovered that the leaves and the flowers had become red.

Which one of the following parts could have helped transport the red colouring?

1. Stem
2. Flower
3. Thorns
4. Leaves

30.

Study the leaf below.

Why do the veins branch out to all parts of the leaf?
The veins _______________________________.

A: absorb sunlight to make food
B: carry water to all parts of the leaf
C: carry food from leaves to other parts of the plant
D: transport oxygen and carbon dioxide to all parts of the plant

1. A only
2. B and C only
3. A, B and C only
4. A, B, C and D

Section B

Write your answers to questions 1 to 14 in the spaces provided.

1.

The table below shows the characteristics of Plant P, Q and R. Use the information given to answer the following questions.

Characteristics of Plant	P	Q	R
Bears flower	√	√	X
Is poisonous	X	√	X
Lives on land	X	√	√

(a) Write down two difference between Plant P and Plant Q.

(i)___________________________________________________________________

(ii)___________________________________________________________________

(b) What is one similarity between Plant Q and Plant R?

____________________________________________________________________

____________________________________________________________________

(c) Write down one example for Plant R.

____________________________________________________________________

2.

Jason and his brother, John, observed the heights of 2 items (one was a living thing and the other was a non-living thing) over a period of 4 weeks and recorded his findings below.

	Height of Item A	Height of Item B
Week 1	3 cm	8 cm
Week 2	6 cm	8 cm
Week 3	9 cm	8 cm
Week 4	12 cm	8 cm
Week 5

Jason and John made some remarks about Items A and B.

Jason said that Object A is a living thing.
John said that Object B is a living thing.

(a) Who was likely to be correct?

____________________________________________________________________

____________________________________________________________________

(b) What do you think the height for Item A and Item B would be on the 5^th week? Fill in the height of item A and item B in the table above.

(c) From Jason's observations, what characteristic of living thing could be conclude?

____________________________________________________________________

____________________________________________________________________

3.

Look at the animals below.

(a) Fill in the heading for Groups X and Y. Group W has been done for you in the classification chart below.

(c) Classify the above animals by completing the chart below.

4.

Study the flow chart below. The letters A, B, C, D, E, F, G and H represent 8 different animals.

Identify the letters that correctly represent these animals.

(a) Spiny anteater: ____________________

(b) Kingfisher: ____________________

(c) Dragonfly: ____________________

5.

Mr Lim made some observations about several plants during a nature walk. They are shown below.

Plants	Grows in/on	Flowering	Floats
A	land	Yes	No
B	land	No	No
C	water	No	Yes
D	water	No	Yes

Fill in suitable sub-headings for the chart below.

6.

Five solid balls of the same size (A, B, C, D and E) are made from rubber, ceramic, wood, metal and glass respectively.
These balls were dropped into a container of water. Draw in the diagram below to show the positions of balls B, C, D and E in the water. Ball A has been drawn for you.

An inflated rubber float and an eraser were dropped into the container. The diagram below shows their positions in a container of water.

(b) Though both the rubber float and the erase are made of rubber, why do you think their positions in the water are different?

____________________________________________________________________

____________________________________________________________________

7.

Sara covered the leaves of Plant A with black paper as shown in the diagram below. She placed both plants A and B in the sun and watered them every day.

(a) What would happen to Plant A after a few weeks?

____________________________________________________________________

____________________________________________________________________

(b) What conclusion could Sara make from this experiment?

____________________________________________________________________

____________________________________________________________________

8.

Mrs Tan set up the following experiment in the classroom to grow some bread mould. She asked her pupils to observe the four pieces of bread every day. After a week, the pupils observed some mould growing on some of the breads.

(a) Which bread had mould growing on it first?

____________________________________________________________________

(b) What could be concluded from this experiment?

____________________________________________________________________

9.

Peter found two living things in the park, as shown below.

(a) State how the mushroom and the bird's nest fern are similar in the way they reproduce.

____________________________________________________________________

____________________________________________________________________

(b) State how the mushroom and the bird's nest fern are different in the way they reproduce.

____________________________________________________________________

____________________________________________________________________

Peter observed that the bird's nest fern was growing high up on the trunk of a big tree.

(c) How did the bird's nest fern get onto the tree?

____________________________________________________________________

____________________________________________________________________

10.

Michael wanted to test the strength of four different sheets of materials, W, X, Y and Z. Each sheet was of the same size and thickness. He placed weights on the materials as shown below and noted the minimum number of weights needed to cause the materials to break. He recorded the results in the bar graph below.

(a) Which one of the materials (W, X, Y or Z) was the weakest>

____________________________________________________________________

(b) Which two of the materials (W, X, Y or Z) could be used to make a book shelve that could withstand a 7kg load?

____________________________________________________________________


(c) Explain your answer.

____________________________________________________________________

11.

The diagram below shows a pot.

(a) What material is the body of the pot made of?

____________________________________________________________________


(b) Aunty May is cooking some food using the pot. She needs to cover the food as it cooks. However, she finds it very troublesome as she needs to open the lid of the pot several times to check if the food is cooked. How can she solve this problem?

____________________________________________________________________

____________________________________________________________________

12.

Look at the skeleton of the animal below.

(a) What animal is this?

____________________________________________________________________

(b) Based on your observation, what is the function of the skeleton?

____________________________________________________________________

(c) Which other body system works with the skeletal system so that this animal is able to move?

____________________________________________________________________

13.

(a) In the diagram below, put a (√) in the boxes where digestion of food takes place. Put a cross (X) in the box where water is removed from the undigested food.

(b) Mrs Chan blended some solid food for her 5-month old baby daughter with a food processor as shown below.

Why did she blend the solid food before feeding her baby daughter?

____________________________________________________________________

____________________________________________________________________

14.

The diagram below shows a picture of a turnip.

(a) Name the part of the plant labelled 'X'.

____________________________________________________________________

(b) How is part 'X' useful to the plant?

____________________________________________________________________

Section A (Answers)

Answers

1.

B.

2.

A.

3.

A.

4.

B.

5.

A.

6.

B.

7.

A.

8.

C.

9.

B.

10.

C.

11.

D.

12.

C.

13.

D.

14.

C.

15.

C.

16.

C.

17.

D.

18.

C.

19.

B.

20.

D.

21.

B.

22.

D.

23.

C.

25.

D.

26.

D.

27.

C.

28.

D.

29.

A.

30.

B.

Section B (Answers)

Answers

1.

(a)(i) Plant P is not poisonous while plant Q is not.

(ii) Plant P lives on water while plant Q do not.

(b) Both Plant Q and R lives on land.

(c) Bird nest fern.

2.

(a) Jason is likely to be correct.

(b) 15cm, 8cm

(c) Living things grow.

3.

W: Insect
butterfly
housefly

X: bird
owl
penguin

Y: mammal
dolphin
bat

4.

(a) B

(b) C

(c) E

5.

A: Flowering

B: non-flowering

C: does not float

D: floats

6.

(a)

(b) The rubber float has air in it so it is enabled to float but eraser does not have air in it.

7.

(a) It will die because the plant cannot make its own food.

(b) Plants need sunlight to stay alive.

8.

(a) Plastic bag B.

(b) Mould need moist to grow.

9.

(a) They both reproduce by spores.

(b) Mushroom feed on dead animals or plants while Bird's nest fern can make its own food.

(c) The spore bags was blow up there by the wind.

10.

(a) Material X was the weakest.

(b) Material Y and Z could be used to make a book shelve that could withstand a 7kg load.

(c) The material is able to withstand more than 7kg so it could be used to make a book shelve.

11.

(a) Metal.

(b) The cover should be make of glass so that Aunty may can see through it.

12.

(a) It is a fish.

(b) It is to support and give the body its shape.

(c) The muscular system.

13.

(a)



(b) A baby does not have a complete set of teeth to chew the food properly, so blending the solid food will help in the digestion.

14.

(a) Root.

(b) It helps the plant to reproduce.