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Which of the following is not an example of the effects of a force?
a roof blocking the sunlight
a pump inflating a balloon
a wall stopping an arrow
a boy dropping a ball
The diagram below shows a torch.
Which one of the following shows the correct circuit for the torch?
A syringe contained some water and air. Kelly blocked the opening of the syringe as shown below.
Which of the following best explains why she was able to push the plunger downwards?
Air has no definite shape.
Air has no definite volume.
Water has no definite shape.
Water has a definite volume.
The diagrams below show an aeroplane during three different stages of its flight.
At which stage(s) does gravity act on the aeroplane?
taking off and flying only
taking off and landing only
taking off, flying and landing
Roger released a marble at position A in the rough wooden bowl shown below. The marble rolled to position B and then to position C where it rolled back.
Which of the following shows the energy conversion when the marble rolled from B to C?
kinetic energy ➔ potential energy
kinetic energy ➔ potential energy + sound energy + heat energy
potential energy + sound energy + heat energy ➔ kinetic energy
potential energy ➔ kinetic energy + sound energy + heat energy
Aisha used the set-up below to collect clean water from sea water.
Which one of the following plates should Aisha use so that she can collect the most amount of clean water within a short period of time?
cool glass plate
warm glass plate
cool steel plate
warm steel plate
A glass containing a block of ice and some water was placed in a room. The room temperature was 25° C.
When the ice and the water were at 0° C, which one of the following statements is correct?
The ice would not melt as it remained at 0° C.
The ice would not melt as it did not gain heat.
The ice would melt as it gained heat from the water.
The ice would melt as it gained heat from the room.
Study the circuit.
After one of the bulbs had blown, all the other bulbs did not light up. Which bulb had blown?
A magnet is used to hold a piece of paper onto the refrigerator as shown below.
Which of the following statement(s) is/are correct?
A - There is friction between the paper and the magnet.
B - There is magnetic attraction between the paper and the magnet.
C - There is gravitational attraction between the paper and the Earth.
A and B only
A and C only
B and C only
The diagram shows a set-up that uses four identical lamps to heat food. When the lamps are brighter, they give out more heat
In which of the following circuits will the lamps give out the most heat?
Shuying wrote a statement: "When the battery is connected in the opposite direction, the poles of the electromagnet will change."
She drew four diagrams, A, B, C and D, as shown.
Which pair of diagrams supports her statement?
A and C
A and D
B and C
B and D
Aziz used the set-up below to study four types of springs, P, Q, R and S.
He placed objects of different mass on each spring and measured the length of the spring. The results are shown in the graph.
Using the same set-up, Aziz wanted to compare the mass of the two oranges.
Which spring, P, Q, R or S, is the most suitable for his set-up?
In a factory, steam flows through metal pipes from one place to another. When straight pipes are used, the pipes will be damaged as shown below.
When pipes with a bend as shown below are used, the pipes will not be easily damaged.
How does the bend prevent the pipe from being damaged?
It allows the hot pipe to expand.
It allows the steam to cool down faster.
It prevents the hot pipe from melting.
It prevents the steam from flowing too fast.
The diagram below shows the layout of the stage for a shadow performance.
There were four actors, A, B, C and D, who were of similar height. The person at X saw the shadows of the actors on the screen as shown.
Which of the following shows the positions of actors A, B, C and D?
Which of the following statements about condensation and evaporation are correct?
A - Both processes involve a change in state.
B - Both processes do not occur at fixed temperatures.
C - One process involves heat gain while the other involves heat loss.
A and B only
A and C only
B and C only
A, B and C