1. Alan works at the mass rapid transit (MRT) station. At the station he checks the gaps
along the train tracks as shown below. The gaps on the train tracks allow
__________________
A.
B.
C.
D.
the expansion of the track on a hot day.
the contraction of the track on a cold day.
the expansion of the track on a cold day.
the contraction of the track on a hot day.
2. When a dented ping pong ball is placed in a
beaker of hot water as shown in the diagram below, it will become round again.
Which one of the following explanation is
correct?
A.
B.
C.
D.
The ball expands.
Hot air enters the ball
The ball increases in mass
Air in the ball increases in volume
3. Ali poured some hot coffee into an empty cup. After a while, the cup becomes hot.
Which of the following explains this?
A. The cup loses heat to the hot coffee.
B. The hot coffee loses heat to the cup.
C. The cup loses heat to the surrounding air.
D. The surrounding air loses heat to the cup.
4. .Which of the following statement(s) about heat is/are FALSE?
A: Most metals contract when heated.
B: Heat can be produced when things burn.
C: Our main source of heat is from electricity.
D: Heat travels from a warm place to a cool place.
A. A only
B. C only
C. A and C only
D. B and D only
5. study the diagram below carefully.
Which one of the following statements are true?
A: The ice cube will lose heat to the hot tea.
B: The air will gain heat from the hot tea and ice cube.
C: The temperature of the hot tea will be less than 95°C after 1 minute.
D: The hot tea will lose heat to the ice cube, glass and the surrounding air.
A. A and B only
B. C and D only
C. B and C only
D. B and D only