Test
0654 P3 Thermal Physics Quiz
Preguntas del test (25)
1A liquid is heated in a beaker
The density of the liquid changes as its temperature increases.This causes energy tobe transferred throughout the liquid.
How does the density change and what is this energy transfer process?
- AA
- BB
- CC
- DD
2A rod is made half of glass and half of copper.
Four pins A, B, C and D are nattached to the rod by wax.
The rod is heated in the centre as shown.
The pins fall off when the wax melts.
Which pin falls off first?
- AA
- BB
- CC
- DD
3Which process involves convection?
- AA bread toasting under a grill
- BB energy from the Sun warming a road surface
- CC hot air rising to the top of a cool room
- DD thermal energy transfer through a copper bar
4A student suggests some uses for containers made from good thermal conductors and for containers made from poor thermal conductors.
In which row are both suggested uses correct?
- AA
- BB
- CC
- DD
5A cotton sheet is ironed with a hot electric iron.
How is energy transferred through the metal base of the iron to the sheet?- AA by conduction only
- BB by convection only
- CC by radiation only
- DD by convection and radiation only
6Two plastic cups are placed one inside the other. A small spacer keeps the two cups separated.
Hot water is poured into the inner cup and a lid is put on top, as shown.
Which statement is correct?
- AA The bench is heated by convection from the bottom of the outer cup.
- BB The lid reduces the energy lost by convection.
- CC There is no thermal conduction through the sides of either cup.
- DD Thermal radiation is prevented by the small air gap.
7A solid is heated from room temperature.
The graph shows how its temperature changes with time as it is heated constantly.
At which time has it just become completely liquid?
- AA
- BB
- CC
- DD
8Thermal energy travels through space from the Sun to the Earth. Space is a vacuum.
How is thermal energy transferred from the Sun to the Earth?- AA by conduction only
- BB by convection only
- CC by radiation only
- DD by convection and radiation
9The diagram shows a vacuum flask used to keep liquid hot.
How does thermal energy pass through the vacuum?
- AA conduction only
- BB convection only
- CC radiation
- DD conduction and convection
10One method of heat transfer involves the energy travelling at a much greater speed than in other methods.
What is the name of this method?- AA conduction
- BB convection
- CC evaporation
- DD radiation
11The diagram shows a block of ice placed in a warm room.
At which point is the temperature the lowest?
- AA
- BB
- CC
- DD
12The air in a room is heated by a heater. The diagram shows the circulation of the air in the room.
Which statement about the air that is heated is correct?
- AA The air contracts and becomes less dense.
- BB The air contracts and becomes more dense.
- CC The air expands and becomes less dense.
- DD The air expands and becomes more dense.
13In a refrigerator, the cooling unit can be fitted either at the top or at the bottom. In an oven, the heater can be fitted either at the top or at the bottom.
Which row shows the best position for the cooling unit and the best position for the heater?
- AA
- BB
- CC
- DD
14 A girl is outdoors. She warms her hands by holding them near a fire, as shown.
How does the heat from the fire reach her hands?
- AA conduction only
- BB convection and conduction
- CC convection and radiation
- DD radiation only
15A heating engineer fits a heater to the ceiling of an office so that workers in the office are kept warm.
How does thermal energy reach the workers below the heater?- AA conduction and convection
- BB convection and radiation
- CC convection only
- DD radiation only
16A substance loses thermal energy (heat) to the surroundings at a steady rate.
The graph shows how the temperature of the substance changes with time.
What could the portion PQ of the graph represent?
- AA gas condensing
- BB gas cooling
- CC liquid cooling
- DD liquid solidifying
17A student wishes to check the upper and the lower fixed points on a Celsius scale thermometer.
She has four beakers P, Q, R and S.
Beaker P contains a mixture of ice and salt.
Beaker Q contains a mixture of ice and water.
Beaker R contains boiling salt solution.
Beaker S contains boiling water.
Which two beakers should she use to check the fixed points?
- AA P and R
- BB P and S
- CC Q and R
- DD Q and S
18The same quantity of thermal energy is supplied to two solid objects X and Y.
The temperature increase of object X is greater than the temperature increase of object Y.
Which statement explains this?- AA X has a lower melting point than Y.
- BB X has a lower density than Y.
- CC X has a lower thermal capacity than Y.
- DD X is a better thermal conductor than Y.
19Which statement describes what happens as ice at 0 °C starts to melt to become water?
- AA Energy is absorbed and the temperature remains constant.
- BB Energy is absorbed and the temperature rises.
- CC Energy is released and the temperature remains constant.
- DD Energy is released and the temperature rises.
20What is meant by the fixed points of the scale of a liquid-in-glass thermometer?
- AA the distance between one scale division and the next
- BB the highest and lowest temperatures that the thermometer can record
- CC the maximum and minimum depth to which the thermometer should be submerged in a liquid
- DD the two agreed temperatures used for marking the temperature scale
21A liquid at room temperature fills a flask and a glass tube to level X.
The flask is now placed in ice, and the liquid level in the tube falls to level Y.
Why does the level fall?
- AA The flask contracts.
- BB The flask expands.
- CC The liquid contracts.
- DD The liquid expands.
22The melting points of ethanol and mercury are shown.
Which of these two liquids is / are suitable to use in a liquid-in-glass thermometer to measure temperatures of –50 °C and –120 °C?
- AA ethanol only
- BB ethanol and mercury
- CC mercury only
- DD neither ethanol nor mercury
23 Which quantity gives the thermal capacity of a beaker?
- AA the thermal energy required to change the state of the beaker at constant temperature
- BB the thermal energy required to raise the temperature of the beaker by 1 °C
- CC the total mass of hot liquid that the beaker can hold
- DD the total volume of hot liquid that the beaker can hold
24A jug of water is at room temperature.
Several ice cubes at a temperature of 0 °C are dropped into the water and they begin to melt immediately.
What happens to the temperature of the water and what happens to the temperature of the ice cubes while they are melting?
- AA
- BB
- CC
- DD
25An engineer wants to fix a steel washer on to a steel rod. The rod is just too big to fit into the hole of the washer.
How can the engineer fit the washer on to the rod?
- AA Cool the washer and then place it over the rod.
- BB Cool the washer and rod to the same temperature and then push them together.
- CC Heat the rod and then place it in the hole in the washer.
- DD Heat the washer and then place it over the rod.
Información
- Descripción
- Quiz on 0645 Physics topic P3 Thermal Physics.
- Autor
- Jeffrey Piggott
- Idioma
- English
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- 4.465
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