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Tuesday 21 August 2012

2012 Primary 3 Science End Year Examination 7

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.
Study the classification table below.

Group A Group B
GlassFried chicken wing
SandRattan basket
RockTissue paper

Give a suitable heading for Group A and B.


Group AGroup B
(1)NaturalMan-made
(2)Never aliveOnce alive
(3)WaterproofNot waterproof
(4)HardSoft
  1. 1
  2. 2
  3. 3
  4. 4
2.
Peter has a three year old pet dog. He realizes that it is much larger than it was a puppy. What characteristic of living things does it show?
  1. Living things can grow.
  2. Living things reproduce.
  3. Living things respond to changes.
  4. Living things need air, food and water.
3.
Which of the following are living things?

A: Coral
B: Puffer fish
C: Clouds
D: Sun
  1. A and B only
  2. A and C only
  3. C and D only
  4. A, B and D only
4.
Look at the grape seed in the picture below.


Which statement about the seed is false?
  1. The seed is a living thing.
  2. The seed helps a plant to reproduce.
  3. The seed cannot make food for the plant.
  4. The seed died when the grapes were plucked.
5.
Study the characteristics of X and Y in the table below.

Characteristics X Y
Able to make foodNoYes
Able to growYesYes
Can reproduceYesYes
Need air, food and waterYesYes

What can X and Y be respectively?


XY
(1)SunflowerRose plant
(2)HamsterMushroom
(3)ButterflyBougainvillea plant
(4)Bird's nest fernTomato plant
  1. 1
  2. 2
  3. 3
  4. 4
6.
The classification chart below shows how some animals are grouped.


In which group should a penguin be placed?
  1. A
  2. B
  3. C
  4. D
7.
Which statement is false about all animals?
  1. They reproduce in the same way.
  2. They cannot make their own food.
  3. They have different body coverings.
  4. They can move from one place to another.
8.
Study the classification chart below.


Which animal as been placed in the wrong group?
  1. Penguin
  2. Frog
  3. Turtle
  4. Snake
9.
Tim observes the following characteristics of an animal.

A: The way it moves.
B: The number of legs it has.
C: The number of body parts it has.
D: The number of stages it has in its life cycle.

From which of the above characteristics would tell him that the animal is an insect?
  1. A and B only
  2. B and C only
  3. B and D only
  4. C and D only
10.
Study the chart carefully.


Which one of the following plants should be placed in group Q?
  1. Sword fern
  2. Water spangle
  3. Bird's nest fern
  4. Coconut palm
11.
Look at the pictures carefully.


In what way if Leaf X different from Leaf Y?
  1. Leaf X is hairy but Leaf Y is smooth.
  2. Leaf X is small in size but Leaf Y is big.
  3. Leaf X is shiny but Leaf Y is not shiny.
  4. Leaf X has rough edges but Leaf Y has smooth edges.
12.
A farmer put some red bean seeds into a small pot of soil and left it in the garden.
The table below shows the growth of the seed over twelve days.

Number of daysHeight (cm)
Day 10
Day 50
Day 120

Which one of the following explains the possible results shown in the table above?
  1. The farmer put the pot in a sunny place.
  2. The farmer put the pot in a shady place.
  3. The farmer did not add water to the soil.
  4. The farmer did not add fertilizer to the soil.
13.
Siti wanted to find out if mineral salts are needed for seeds to germinate. Which of the two following set-ups should she use to carry out a fair test?

Set-upConditions
ADry cotton wool without mineral salts
BDry cotton wool with mineral salts
CMoist cotton wool with mineral salts
DMoist cotton wool without mineral salts
  1. Set-ups A and B
  2. Set-ups A and D
  3. Set-ups B and C
  4. Set-ups C and D
14.
Which of the following statements are true about fungi?

A: Fungi are living things.
B: Fungi reproduce by spores.
C: All fungi can make food.
D: All fungi have a cap, gills and stem.
  1. A and B only
  2. A and D only
  3. B and C only
  4. C and D only
15.
The table below shows how some things are classified. Which group has been classified wrongly?


PlantsMicro-organismsFungi
(1)MossBacteriaMushroom
(2)Water LilyYeastToadstool
(3)Bird's nest fernBacteriaMould
(4)Bracket fungusMouldWater Lily
  1. 1
  2. 2
  3. 3
  4. 4
16.
Tim placed a slice of raw fish in the refrigerator and another similar piece of the same size on a kitchen table. He records the time taken for each slice of raw fish to start smelling bad. What was the aim of his experiment?
  1. To find out if a slice of raw fish smells bad.
  2. To find out if raw fish or cooked fish turns bad faster.
  3. To find out how temperature affects the growth of bacteria on a slice of raw fish.
  4. To find out how the surface area of a slice of raw fish affects the time it takes to turn bad.
17.
Susan sprayed some water on a piece of bread. It was left in a cupboard for a few days. The bread was later found to have mould growing on it. What are the factors affecting the presence of mould on the bread?

A: Food
B: No air
C: Sunlight
D: Sufficient moisture
  1. A and C only
  2. A and D only
  3. B and C only
  4. C and D only
18.
Study the classification chart below.


In which of the following groups would you place cotton and plastic in?


CottonPlastic
(1)Man-madeNatural
(2)NaturalMan-made
(3)NaturalNatural
(4)Man-madeMan-made
  1. 1
  2. 2
  3. 3
  4. 4
19.
The classification chart below shows how come objects are grouped into Groups X and Y.


Which of the following headings best describe the objects classified above?


Group XGroup Y
(1)HardSoft
(2)Non-breakableBreakable
(3)FlexibleNon-flexible
(4)Made from natural
materials
Made from man-made
materials
  1. 1
  2. 2
  3. 3
  4. 4
20.
Which of the following materials would be a suitable choice for making part X?

  1. wood
  2. ceramic
  3. steel
  4. glass
21.
Which of the following objects are made from plants?

A: Eraser
B: Tissue paper
C: Plastic shower curtain
D: Silk blouse
  1. A and B only
  2. B and D only
  3. A, B and D only
  4. All of the above
22.
Based on the flow chart below, what could Animals X, Y and Z be?



Animal XAnimal YAnimal Z
(1)DragonflyChickenMosquito
(2)CockroachDragonflyFrog
(3)ButterflyDuckDragonfly
(4)MosquitoFrogDuck
  1. 1
  2. 2
  3. 3
  4. 4
23.
The life cycle of the mosquito is shown below.


At which stage of its life cycle is harmful to humans?
  1. Egg
  2. Larva
  3. Pupa
  4. Adult
24.
Which one of the following statements about the life cycle of animals if true?
  1. All the young of the animals look like their parents.
  2. The lengths of the life cycle of all animals are the same.
  3. The young go through the same life cycle as their parents.
  4. All animals have the same number of stages in their life cycle.
25.
A papaya plant is an adult plant when ________________________________.
  1. it has stems
  2. it bears flowers
  3. it starts to grow roots
  4. it is able to make its own food
26.
What is the main function of flowers in the life cycle of flowering plants?
  1. To make food for the plants.
  2. To take in sunlight for the plants.
  3. To take in water for the plants to grow well.
  4. To bear fruits and seeds for the plants to reproduce.
27.
Which of the following graphs show what would happen to the weight of the seed leaves when the young plant grows?
28.
Look at the diagram below.
Which one of the following functions can still be carried out by this plant?
  1. It can bear flowers and fruits.
  2. It can make food for the plant.
  3. It can take in water from the soil.
  4. It can transport food to all parts of the plant.
29.
The trees in a forest are very tall and thin. Why is that so?
  1. For birds to live in them.
  2. To make food for the plant.
  3. In order to absorb as much water when it rains.
  4. In order to absorb as much sunlight as possible.
30.
The diagram below shows a peanut plant.


Which of the following part is the fruit of the plant?
  1. A
  2. B
  3. C
  4. D

Section B

For questions 1 to 14, write your answers in the spaces provided.
1.
Sam conducts an experiment using the set-ups as shown.


Two tightly sealed glass containers of the same size have the same amount of water with an equal amount of air supplied. Both set-ups are left in the sun for seven days.

(a) What will Sam observe in both set-ups after seven days?

____________________________________________________________________

____________________________________________________________________

(b) Explain your answer given in (a).

____________________________________________________________________

____________________________________________________________________
2.
Look at the two animals shown below. Animals X and Y are not drawn to scale.


Based on the pictures only, state two physical differences between Animal X and Animal Y. (Do not compare their sizes or movement.)

(a) __________________________________________________________________

(b) __________________________________________________________________
3.
Study the classification chart below.


(a) Which animal in the above groupings has been classified wrongly?
Give a reason.

____________________________________________________________________

____________________________________________________________________

(b) Based on your answer in (a), which group should the animal be placed?

____________________________________________________________________

(c) Give a suitable heading for Group B.

____________________________________________________________________
4.
Wally carried out an experiment. He put some honey bee larvae into four similar glass tanks as shown.


(a) In which glass tank would the honey bee larva survive the longest?
Explain your answer.

____________________________________________________________________

____________________________________________________________________

(b) Wally wants to find out if living things need air to survive. Which two tanks should he use for his experiment?

____________________________________________________________________

____________________________________________________________________
5.
Study the diagrams below.


(a) Identify the living things shown in the diagrams.

A: _____________________________

B: _____________________________

(b) List two similarities of the two living things as shown above.

(i) __________________________________________________________________

(ii) __________________________________________________________________
6.
Tom carried out an experiment using two set-ups with the same flowering plant in each. They were placed under similar conditions. However, in Set-up A, the plant was placed in clear water and in Set-up B, the plant was placed in blue coloured water.


(a) Compare the appearances of the white flower in both set-ups after 3 days.

____________________________________________________________________

____________________________________________________________________

(b) What was the aim of the experiment?

____________________________________________________________________

____________________________________________________________________
7.
Look at the pictures below showing the roots of two different plants.


Roots hold plants firmly to the ground. Based on the pictures, answer the following questions.

(a) Which of the two plants would be uprooted more easily? Give a reason for your answer.

____________________________________________________________________

____________________________________________________________________

(b) Name another function of the roots of Plant X and Plant Y.

____________________________________________________________________

____________________________________________________________________
8.
Aisha conducted four different types of tests to determine the properties of Materials X, Y and Z. The results were recorded in the table below.

Type of test
conducted
Material
X
Material
Y
Material
Z
Is it waterproof?YesNoYes
Does it break easily?NoNoNo
Is it flexible?YesYesNo
Does it float or sink?SinkFloatFloat

(a) Based on the table above, which material would be the best to make a swimming kickboard?

____________________________________________________________________

____________________________________________________________________

(b) Give a reason for your answer.

____________________________________________________________________

____________________________________________________________________
9.
Study the classification chart below carefully.


(a) From the classification chart above, describe Animal Z.

____________________________________________________________________

____________________________________________________________________

(b) Which letter, W, X, Y, or Z, represents each of the following animals?

(i) cockroach: ______________

(ii) housefly: _______________
10.
Ali caught a caterpillar and kept it properly in a plastic container covered with a wire mesh. He provided some leaves for it. After some time, he observed some changes as shown in the picture below.


(a) What had happened to the caterpillar?

____________________________________________________________________

____________________________________________________________________

(b) What is the difference between the life cycle of a butterfly and a grasshopper?

____________________________________________________________________

____________________________________________________________________
11.
Freddy planted 5 pots of bean seedlings He placed them at the balcony and watered them daily with different amounts of water. He measured the height of the seedlings on the twelfth day.
Study his chart below.


(a) From the chart, suggest the least amount of water to give to the seedlings per day to ensure that they grow to at least 20cm in twelve days.

____________________________________________________________________

____________________________________________________________________

(b) What was Freddy trying to find out from the experiment?

____________________________________________________________________

____________________________________________________________________

(c) What other conditions are important for a seedling to grow well?

____________________________________________________________________

____________________________________________________________________
12.
(a) Rearrange the stages of the life cycle of a bean plant as shown in the diagram below. Use 1, 2, 3 and 4 to fill in the boxes.


(b) At which stage will the plant be able to produce fruits and flowers?

____________________________________________________________________
13.
State whether each of the following statements is true (T) or false (F).

StatementTrue/False
(a) All flowering plants reproduce by seeds.
(b) All non-flowering plants do not produce
fruits.

(c) Plants can only be found on land.
(d) All plants can make food with air and water.
14.
Study the flow chart below carefully and answer the following questions.


(a) Which living thing in the flow chart has been placed wrongly?

____________________________________________________________________

(b) Explain your answer in (a).

____________________________________________________________________

____________________________________________________________________

(c) How does mould reproduce?

____________________________________________________________________

Section A (Answers)

Answers

1.
B.
2.
A.
3.
A.
4.
D.
5.
C.
6.
B.
7.
A.
8.
C.
9.
B.
11.
D.
12.
C.
13.
D.
14.
A.
15.
D.
16.
C.
17.
B.
18.
B.
19.
C.
20.
A.
21.
A.
22.
D.
23.
D.
24.
C.
25.
B.
26.
D.
27.
D.
28.
C.
29.
D.
30.
D.

Section B (Answers)

Answers

1.
(a) The guppy died and the tape grass did not die.

(b) The guppy has no food while the tape grass can make its own food.
2.
(a) Animal X has three body parts while Animal Y has only one body part.

(b) Animal X has six legs while Animal Y has only four legs.
3.
(a) The Dolphin is a mammal but the rest are fish.

(b) Group C.

(c) Birds.
4.
(a) Tank A. There is air and food.

(b) Tank A and Tank C.
5.
(a) P: Mushroom. R: Mould

(b)(i) Both living things are fungi.

(ii) Both living things reproduce by spores.
6.
(a) Set-up A flowers remained white while Set-up B flowers became blue.

(b) Do the roots absorb water to the plant parts.
7.
(a) Plant Y's roots is shorter and not able to hold the plant firmly to the ground.

(b) It takes in water and mineral salt.
8.
(a) Z.

(b) It is waterproof and floats on water.
9.
(a) It has a 4-staged life cycle and lives on load.

(b)(i) W.
(ii) Z.
10.
(a) It became a pupa.

(b) A life cycle of a butterfly is a 4-stage life cycle while the grasshopper has a 3-stage life cycle.
11.
(a) 45cm3.

(b) To find out if different amount of water affects the growth of plants.

(c) Sunlight and air.
12.
(a) 1 3 2 4

(b) Stage 4
13.
(a) T

(b) T

(c) F

(d) F
14.
(a) Mould.

(b) Mould cannot make its own food.

(c) By spores.

2012 Primary 3 Science End Year Examination 6

Section A

For each question from 1 to 25, four options are given, one of them is the correct answer. Make your choice (1, 2, 3 or 4).
1.

Which of the following sub-headings should A and B be?


AB
(1)FlexibleStiff
(2)LightHeavy
(3)BigSmall
(4)HardSoft
  1. 1
  2. 2
  3. 3
  4. 4
2.
Which of the following is an example of a living thing that responds to changes?
  1. A turtle lays eggs.
  2. The leaves of a tree have holds in them.
  3. The rain tree closes its leaves when night falls.
  4. The pupil pours 30 ml of water into the measuring cylinder.
3.
The items in the table are grouped into Group A and B. How are the items grouped?

Group AGroup B
Car tyreName card
Ping pong ballTissue paper
Shirt buttonAn envelope
  1. materials
  2. size
  3. weight
  4. shape
4.
Which of the following characteristics describe the spiny anteater as a mammal?

A: It has hairs.
B: It lays eggs.
C: It lives on land.
D: It feeds its young milk.
  1. A and B
  2. C and D
  3. A and D
  4. B and C
5.
Study the classification diagram below and answer Questions 5 and 6.


How are the animals in Group E and F classified?


Group EGroup F
(1)Live on landLive in water
(2)Have four legsHave 2 legs
(3)Covered with hairCovered with feathers
(4)Not edibleEdible

  1. 1
  2. 2
  3. 3
  4. 4
6.
Which of the following statements describes the difference between a bat and a kingfisher?
  1. A bat can fly but a kingfisher swims.
  2. A bat gives birth to live young but a kingfisher lays eggs.
  3. A bat lives on land but a kingfisher lives in the water.
  4. A bat is a meat eater but a kingfisher is a plant eater.
7.
Which of the following statements is true?
  1. Chlorophyll gives plants their green colour.
  2. Plants depend on other living things for food.
  3. The roots of all plants are found in the ground.
  4. All plants have roots, stem, leaves, flowers and fruits.
8.
The classification chart below shows how some living things can be grouped.

Which of the following represents X and Y?


Group XGroup Y
(1) Make their own foodCannot make their own food
(2)Reproduce from seedsReproduce from spores
(3)Fruits with many seedsFruits with one seed
(4)Live on landLive in water
  1. 1
  2. 2
  3. 3
  4. 4
9.
Which of the following are not true about bacteria?

A: All bacteria are harmful to man.
B: Bacteria are micro-organisms.
C: Bacteria reproduce from spores.
D: Bacteria exist in different shapes.
  1. A, B and C
  2. A, C and D
  3. C and D only
  4. A and C only
10.
From the diagram below, it can be concluded that ________________________________

  1. B and E can fly.
  2. A and E do not eat plants.
  3. D and E live in the same place.
  4. B and C have the same type of body covering.
11.
The diagram below shows the life cycle of a grasshopper.


Which of the following animal/animals has/have a similar life cycle?

A: Cockroach
B: Dragonfly
C: Praying mantis
  1. A and B only
  2. B only
  3. A and C only
  4. A, B and C
12.
Which of the young below does not look like its parents?
  1. chick
  2. mealworm
  3. cockroach nymph
  4. grasshopper nymph
13.
Which of the following shows the correct order in the development of a seed?

  1. A -> B -> C -> D
  2. B -> C -> A -> D
  3. C -> D -> A -> B
  4. B -> A -> D -> C
14.
Which of the following parts form the reproductive system of a flowering plant?

A: Stem
B: Seed
C: Fruit
D: Flower
  1. A and B
  2. B and C
  3. A, B and C
  4. B, C and D
15.
Study the concept map below.


Which of the functions above are correct?
  1. A and B
  2. B and C
  3. C and D
  4. A and D
16.
The tables and chairs in Tom's classroom are made of certain types of plastic and metal. Which of the following are the most likely reasons for using plastic and metal to make the tables and chairs?


MetalPlastic
(1)hardflexible
(2)flexiblestrong
(3)strongcheap
(4)cheaphard
  1. 1
  2. 2
  3. 3
  4. 4
17.
Raju grouped some materials in the table below.

AB
window grillewooden chopsticks
sewing needlecar tyres
screw drivercotton blouse
nailleather belt
thumbtackpaper plate

Which of the following are suitable headings for A and B?


AB
(1)strongflexible
(2)Made of metalMade of plastic
(3)Sink in waterFloat in water
(4)Never aliveOnce alive
  1. 1
  2. 2
  3. 3
  4. 4
18.
Hui Hui put three items into a tub of water. She observed that only two of the items floated on the water.
What could these two items be?

A: safety pin
B: plastic bag
C: bottle cap
D: marble
  1. A and B
  2. B and C
  3. C and D
  4. A and D
19.
Mr Lee wants to make a hammock in his garden. Which of the following physical properties of the material must he consider for the hammock?


The material must be _______________________.

A: hard
B: strong
C: flexible
D: transparent
  1. A and B only
  2. B and C only
  3. C and D only
  4. A and C only
20.
Which of the following methods will destroy the magnetism of a magnet?

A: heating it for some time
B: dropping it from a height
C: stroking it with a non-magnetic object
D: coiling wires around it and running an electric current through the wire.
  1. A and B
  2. A and C
  3. A, B and D
  4. B, C and D
21.
Two bar magnets, suspended by strings, were tied to a wooden rod.
A thin sheet made of material X was placed between the two magnets.
The two bar magnets moved towards each other, as shown in the diagram below.


What is material X likely to be?
  1. iron
  2. steel
  3. glass
  4. nickel
22.
Which one of the following diagrams below names the pole of the pins correctly?
23.
Peter wants to carry out an experiment to find out which magnet is stronger. Which two set ups must Peter use to ensure a fair test?

  1. A and C
  2. B and C
  3. B and D
  4. A and D
24.
Look at the two set ups below.


The iron nail in set up N would attract more paper clips because

A: more batteries are used in set up N.
B: the wire in set up N is longer.
C: the wire is coiled more times around the nail in set up N.
  1. A only
  2. A and B only
  3. A and C only
  4. B and C only
25.
Juney used the 'stroke' method to turn an iron nail into a magnet.
She then placed the nail over some iron filings.
She observed that not all the filings were attracted to the nail.
Based on her observations, which of the following states the reason why the nail did not attract all the filings.

  1. The nail had not been magnetised.
  2. The iron filings had been magnetised.
  3. The nail was not strong enough to attract all the iron filings.
  4. The nail had not been stroked with the same pole of the magnet.

Section B

For questions 1 to 17 write your answers in the spaces provided.
1.
The picture below shows a snail.


(a) What happens to the snail if you touch it?

____________________________________________________________________

(b) From your answer in part (a), what can you conclude about living things?

____________________________________________________________________

____________________________________________________________________
2.
The pictures below shows three items.


(a) One of the items cannot be grouped with the others. Which item is it?

____________________________________________________________________

(b) Give a reason to explain your answer in part (a).

____________________________________________________________________
3.
The classification diagram below shows how six different animals are grouped. Use the information given to answer the following questions.


(a) Write down one difference between the platypus and the horse.

____________________________________________________________________

(b) Which animal is wrongly classified?

____________________________________________________________________

(c) Where would you place a guppy in the classification chart above?

____________________________________________________________________

(d) Using the animals listed in the table below, give suitable headings, R, S, T and U to show how the animals can be re-grouped.

Do not have hair on their bodiesHave hair on their bodies
RSTU
Sea gullGoldfishWhaleHorse

R:_________________________________________________________________

S:_________________________________________________________________

T:_________________________________________________________________

U:_________________________________________________________________
4.
Matthew used a wooden box to cover a patch of grass in his garden. The diagram below shows Matthew removing the wooden box from the patch of grass that he had covered after one week. He observed that the patch of grass has withered.



(a) Give a reason why the patch of grass has withered.

____________________________________________________________________

(b) John set up an experiment, as shown below, to observe the germination of a seed over a period of six days.


What can he conclude about the germination of a seed at the end of the experiment?

____________________________________________________________________

(c) Where does the seed get its food during germination?

____________________________________________________________________
5.

(a) From the above flow chart, which group represents fungi?

____________________________________________________________________

(b) Give a reason for your answer in part (a)

____________________________________________________________________

(c) Give one other characteristic of fungi that is not stated in the above flow chart.

____________________________________________________________________
6.
Mary studied the larva of an insect over a period of time. After some time, she noticed that it had grown bigger.

Write down the two main activities of the larva during this stage.

____________________________________________________________________
7.
"The Aedes mosquito associated with dengue is an outdoor dweller. Officers of the National Environmental Agency (NEA) had found 6 011 breeding sites in homes in the first half of this year. NEA officers will visit more than 100 000 homes in the next four months to seek and destroy all breeding sites." (Straits Times 28 July 2011)

(a) Write down 2 ways to prevent the breeding of mosquitoes in the home.

(i) ______________________________________________________________

(ii) ______________________________________________________________
8.
The graph below shows the number of days each stage of the life cycle of two insects lasted.


(a) Which insect has a longer life cycle?

____________________________________________________________________

(b) Name an insect which has the same number of stages as insect A/B shown in the graph above.

____________________________________________________________________
9.
State one difference between the life cycle of a grasshopper and the life cycle of a beetle.

____________________________________________________________________
10.
Sumei wanted to find out the conditions needed for seeds to grow. She carried out an experiment as shown below.



(a) In which beaker would the seeds germinate? Explain your answer.

____________________________________________________________________

____________________________________________________________________

____________________________________________________________________
11.
The diagram below shows a rambutan fruit that is cut open.


(a) Name the part marked A

____________________________________________________________________

(b) What is the use of A to the plant?

____________________________________________________________________
12.
The picture below shows a car.


State the material used for making each of the parts named and the reason why the material is suitable.

ObjectMaterial used to make the
parts
Why the material is suitable
Windscreen

Tyre

Car body

13.
Melissa conducted an experiment to test the strength of four different types of threads. She added weights to the hook as shown in the diagram below, one at a time, until the thread broke. Each weight is 100g.


She recorded the results in the table.


Thread EThread FThread GThread H
Number
of
weights
before
the
thread
breaks
2345

(a) Based on the information above, which thread/threads could you use to support a 350-gram object?

____________________________________________________________________

(b) Which thread is the weakest?

____________________________________________________________________
14.
Mei Mei placed two identical ring magnets X and Y, through a wooden rod as shown in the diagram below.
She observed that magnets X and Y were at a distance from each other.


(a) Explain why magnets X and Y behaved in this manner?

____________________________________________________________________

____________________________________________________________________

(b) What magnetic poles are A and B?

A: _______________________________

B: _______________________________
15.
The set up below shows a magnet and an object Y.


When the piece of magnet is placed near Object Y, Part A is attracted to the south pole of the magnet. When Part B is placed near the south pole of the magnet, it is also attracted to the magnet.
Based on the information, put a tick (√) in the correct boxes below for the following statements.


StatementsTrueFalseNot possible to tell
(a)Object Y is a magnet


(b)The north pole of the magnet
will attract Part B of the object.



(c)The north pole of the magnet
will not attract part A of the
object.



(d)Object Y is made of steel.


16.
Timothy stroked an iron bar 25 times with a bar magnet, as shown in the diagram.


(a) Name poles A and B of the iron bar after it becomes a magnet.

A: ____________________________________

B: ____________________________________

(b) Timothy then replaced the iron bar with an aluminum bar and stroked it 25 times.

Will Timothy succeed in making the aluminum bar a magnet?
Why?

____________________________________________________________________

____________________________________________________________________
17.
Some objects are listed in the box.

metal rulerelectric bellcompass
refrigerator dooriron nailaluminum try


Group the objects according to the classification table below.


Section A (Answers)

Answers

1.
D.
2.
C.
3.
D.
4.
C.
5.
C.
6.
B.
7.
A.
8.
B.
9.
D.
10.
D.
11.
D.
12.
B.
13.
D.
14.
D.
15.
A.
16.
C.
17.
D.
18.
B.
19.
B.
20.
A.
21.
C.
22.
C.
23.
C.
24.
C.
25.
C.

Section B (Answers)

Answers

1.
(a) The snail will curl into its shell.

(b) All living things respond to changes around them.
2.
(a) Television

(b) The television is not a living things while the dog and the bean are living things.
3.
(a) The platypus lays eggs whilst the horse gives birth to young alive.

(b) Ostrich.

(c) C.

(d) R: Live on land.
S: Live in water.
T: Live in water.
U: Live on land.
4.
(a) It has no sunlight to make its food.

(b) A seed need air, water and warmth in order to germination.

(c) It gets its food from its seed leaves.
5.
(a) D.

(b) IT does not have chlorophyll and it reproduces by spores.
6.
Feeding and moulting.
7.
(a) (i) Spray the water surface with oil.

(ii) Pour away all stagnant water.
8.
(a) Insect B.

(b) Butterfly.
9.
A grasshoppers life cycle has 3 stages where as a cockroach's life cycle has 4 stages.
10.
It has air, water and warmth. Warmth does not need to come from the sun.
11.
(a) It is the seed.

(b) It helps to reproduce.
12.
Glass : It is transparent

Rubber: It is flexible

Metal: It is strong
13.
(a) G and H

(b) E
14.
(a) It is because north pole of magnet Y is facing north pole of magnet X. Like poles repel.

(b) A: South seeking pole.
B: North seeking pole.
15.
(a) F

(b) T

(c) D

(d) Not
16.
(a) A: South seeking pole.
B: North seeking pole.

(b) No. Aluminum is not a magnetic object.
17.
Compass
Electric bell
Refrigerator door


Metal ruler
Iron nail
Aluminum tray