IBT (International Benchmark Test) Sample Paper Grade 8 Science
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Transcript of IBT (International Benchmark Test) Sample Paper Grade 8 Science
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CLASS 8
ABOUT THIS PRACTICE TESTThis Practice Test has 15 questions. It has been designed to give you an idea of the main IBT assessment.
ANSWERING THE QUESTIONSEach question has four options. Choose the BEST answer from the four options A, B, C or D.You will find the key to the answers on the last page of this booklet.
EQUIPMENT ALLOWED IN THIS PRACTICE TESTYou may use a pencil for this Practice Test. You may NOT use a dictionary.
ESTIMATED TIME FOR THIS PRACTICE TESTYou should be able to complete this Practice Test in approximately 30 minutes.
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Copyright 2012 Australian Council for Educational Research 2 Class 8 Science Practice Test
After playing football Dawoud found his shirt was wet from sweating (perspiring).
What is the main reason why people sweat?
The diagram shows the different layers of rocks in a cliff.
Which type of rock is most resistant to weathering?
A it helps keep their bodies coolB so they will be thirsty and drink more
C it gets rid of extra water from their bodiesD it gets rid of extra salt from their bodies
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A B C D
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3 Copyright 2012 Australian Council for Educational ResearchClass 8 Science Practice Test
A lit candle on a cork was floated in a tub of water and a glass jar was placed upside-down on it. The drawings below show the setup for the experiment and the result of the experiment.
What could be concluded from this result?
A the most important gas in air is oxygenB the burning candle went out because the wick ran outC the burning candle went out because it got wetD the burning candle changed the volume of the air in the jar
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4 All matter is made up of small particles. When substances are heated their particles start to move apart.
Which of the following would have their particles furthest apart?
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melting ice
Bice
C water vapourD
liquid water
Many years ago, sailors on long journeys became sick with the disease scurvy. Scurvy is caused by a lack of vitamin C.
What could the sailors have eaten to prevent them from getting scurvy?
A eggsB milk
C orangesD red meat
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Setup Result
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Copyright 2012 Australian Council for Educational Research 4 Class 8 Science Practice Test
C D
A B
Her sister, Heena, walks more quickly than Farida.
Which graph best shows the time it would take Heena to walk to the shop?
Scientists think that temperatures on Earth are increasing. This is called the Greenhouse Effect.
Which gas contributes most to the increasing temperature on Earth?
A carbon dioxideB oxygenC nitrogenD helium
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Farida made a graph of the time it took her to walk to the shop.7
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5 Copyright 2012 Australian Council for Educational ResearchClass 8 Science Practice Test
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What do the birds in this food web feed on?
A snakes B caterpillars and grass
C snakes and grasshoppersD grasshoppers and caterpillars
8 The characteristics a person has are inherited from their parents. These characteristics are passed on in units called genes.
Which of the following statements about genes is true for humans?
A A female child gets more genes from her mother than her father.B Older children get more genes from their parents than younger children.
C Children get half their genes from their mother and half from their father.D The number of genes passed on from each parent varies randomly for each child.
Bird
Snake
Grasshopper
Grass
Caterpillar
Frog
means is eaten by
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Copyright 2012 Australian Council for Educational Research 6 Class 8 Science Practice Test
Varsha tied a plastic bag around a bunch of leaves on a tree. The next day there was water inside the bag. She thought that the water came out of the leaves.
What would be the best thing to do to help Varsha see if she is correct?
A Tie bags around two bunches of leaves on the tree.BCD
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A battery directly changes chemical energy into
A light energy. B sound energy. C electrical energy.D movement energy.
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Dont water the plant for two days then repeat the experiment.
Tie a bag around a small branch with the leaves removed.
Tie bags around two bunches of leaves and put them in a dark cupboard.
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7 Copyright 2012 Australian Council for Educational ResearchClass 8 Science Practice Test
What are the products of reaction when an acid reacts with a base?
acid + base = ?
12 Razaks class set up the following experiment to see what seeds need to start growing (to germinate).
The class came up with four questions they thought they could answer from the results of their experiment.
1. Do seeds need water to start growing?2. How many seeds need to be planted in order for germination to occur?3. Is sunlight needed for seeds to germinate?4. How much soil do seeds need to start growing?
Which of these questions can the experiment answer?
A 1 only
B 1 and 3 only
C 2 and 3 only
D 1, 3 and 4 only
A a gas and water
B a base and water
C a salt and waterD an acid and water
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Pot 1 Pot 2 Pot 3 Pot 4
two seeds sunlight watered regularly
Result:the seeds
started to grow
two seeds sunlight never watered
Result:the seeds
did not startto grow
two seeds dark cupboard watered regularly
Result:the seeds
started to grow
two seeds dark cupboard never watered
Result:the seeds
did not startto grow
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Copyright 2012 Australian Council for Educational Research 8 Class 8 Science Practice Test
14 Druv was playing a game with 2 marbles which were the same size but different colours. He noticed that when he rolled a marble and it hit a second stationary one, the first marble would stop and the second would begin moving.
He drew three diagrams to show what happened.
If the grey marble was much bigger, predict what would happen.
A Both marbles would move to the left.
B The marbles would stick together and slide along as one.
C The dark marble would bounce back and the grey marble would move slowly.D The marbles would both move to the right but the dark one would move faster
15 Druvs observations best demonstrate that
A energy can change from one type to another.
B objects can only have one type of energy at a time.
C energy can be transferred from one object to another.D dark coloured objects have more energy than light coloured objects.
Diagram 1
Diagram 2
Diagram 3
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9 Practice Test ecneicS 8 ssalC Copyright 2012 Australian Council for Educational Research
Answer Key
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