Primary 6 Science

In a pond, there are very tiny plants which are too small to be seen by our eyes. They are important to the aquatic animals in the pond because they ___________________.

• protect them

• provide them with warmth

• are a source of food for them

• break down dead organisms into simple substances

Flowers benefit from the visits of insects like butterflies and bees because they _______________________________________.

• pollinate the flowers

• lay eggs on the flowers

• provide food for the flowers

• disperse the seeds of the flowers

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4 students made the following statements below about some animals. Which is the correct statement?

• Ailee: Whale is a fish as it lives in water

• Ben: Guppy is a mammal as it gives birth

• Clark: Spiny anteater is a mammal as it suckles its young

• Denise: Crab is an amphibian as it can breathe in water and on land.

Tricia put a red rose and white rose into a beaker of red-coloured water each. After a few days, she made the following statements.

A: The white rose turned red.

B: Only the white rose took in water

C: The stem transported water to the flowers

Which of the following statements are correct?

• A only

• B only

• A and C only

• B and C only

• A and B only

• C and D only

• B and D only

• A and C only

Gabriel has a toy car. He turns the key a few times to wind it up.

Which of the following statements are true after he released it?

A: The potential energy of the car will increase as it moves along the floor.

B: The potential energy in the car decreases then increases as it moves along the floor.

C: The kinetic energy of the car starts to increase and then decrease as it moves along the floor.

D: The potential energy in the car will be converted to kinetic energy and heat energy as it moves along the floor.

• C and D only

• A,B and C only

• B, C and D only

• All of the above

Ali, Bala, Carl and Denise made a statement each about the living things in the aquarium.

Ali: The fish breathe through their gills

Bala: The fish give out oxygen for the plants

Carl: Plants take in oxygen through their roots.

Denise: The plants take in dissolved oxygen in the water.

Which of the following statements are correct?

• Ali and Bala

• Bala and Carl

• Ali and Denise

• Carl and Denise

Helen felt cold in an air conditioned room.

Which of the following statements can be used to explain correctly why she felt cold?

• Her body lost heat to the surrounding air

• Her body gained heat from the surrounding air

• Her body lost coldness to the surrounding air

• The surrounding air lost coldness to her body

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