PSLE Set 1

A container is used to transport heavy objects.

The material for making the container must be ___________________.

• flexible

• strong

• transparent

• waterproof

Which of the following shows the properties of a gas?

• 1

• 2

• 3

• 4

Study the circuit.

When one bulb was blown, the other bulbs did not light up. Which bulb was blown?

• A

• B

• C

• D

Yiping put an ice cube at the bottom of a tube of water. He heated the water near the top as shown.

After some time, the water near the top started to boil. However, the ice cube did not melt.

Which statement best explains why the ice cube did not melt?

• Heat flowed only in the upward direction.

• Heat was used up to boil the water near the top.

• Heat passed through the water very slowly to the ice cube.

• The melting point of the ice cube was higher than the boiling point of water.

Four rings, F, G, H and J, are placed one at a time on a holder. Among the four rings, two are ring magnets and two are iron rings. The observation is as shown.

Which two are the iron rings?

• F and G

• F and J

• G and H

• H and J

When water changes from gas to liquid at 100 °C, which of the following is correct?

• The water is boiling.

• The water gains heat from the surroundings.

• The water loses heat to the surroundings.

• There is no heat gain or loss by the water.

Identical bulbs, R, S and T, are used in the circuit.

Which change will allow all bulbs to light up with equal brightness?

• increase the number of batteries

• add an identical bulb in series with R

• add an identical bulb in parallel with R

• add an identical bulb in series with Sand T

In the set-up, a compressed spring was used to push a block. The block would then slide along the table top before stopping.

Which force(s) acted on the sliding block at X?

• 1

• 2

• 3

• 4

In the set-up, the metal ball is free to move in a metal holder but cannot come out.

Which of the following is a possible way to take the ball out?

• add oil to the ball

• heat the ball only

• heat the holder only

• heat both the ball and the holder

Xiaoming observed four solid blocks made of materials A, B, C and D. He classified them as shown.

One of the materials is a metal. Which material is metal?

• A

• B

• C

• D