Physics for IGCSE & O level - Thermal Effects (Section 3)
1
What is the energy required to convert a solid to liquid at its melting point called?
2
When water freezes, what happens to its volume?
3
What type of thermometer uses a liquid to measure temperature?
إجابة(D)
Liquid-in-glass thermometer
4
If you increase the humidity, what happens to the rate of evaporation?
5
In a hot water system, what process is used to circulate the water?
6
How does the kinetic theory explain the expansion of solids?
إجابة(C)
Particles speed up and spread apart.
7
Which of the following is an example of latent heat?
8
What unit is commonly used to measure temperature?
9
What are the two factors that primarily determine the rate of evaporation?
10
What term describes the energy required to change 1 kg of a substance from liquid to gas at its boiling point?
إجابة(C)
Latent heat of vaporization
11
When a material changes from a liquid to a gas, is it a phase change?
12
In a bimetallic strip, why does the strip bend when heated?
إجابة(B)
The two metals have different expansion rates.
13
What type of energy is transferred by conduction?
14
What kind of energy does a hot object contain?
15
Which of the following statements about boiling is correct?
إجابة(D)
Boiling is a very rapid form of evaporation.
16
What is the change of state called when a gas changes into a liquid?
17
In a hot water system, what is the role of the hot water rising?
إجابة(B)
To heat the entire house by convection.
18
What process does the Earth use to get heat from the sun?
19
Which one of these is not a process of change of state of matter?
20
What happens to the energy of the molecules as a liquid evaporates?
إجابة(B)
The molecules lose energy
21
Which of the following are examples of poor thermal conductors (insulators)?
22
What is the relationship between the color of a surface and its absorption of radiation?
إجابة(A)
Darker colors absorb more radiation.
23
Which of the following materials has the highest specific heat capacity?
24
What is the freezing point of water in degrees Celsius?
25
Which of the following factors affect the rate of evaporation?
26
What does the kinetic theory of matter explain?
إجابة(A)
The movement and behavior of particles
27
In the context of evaporation and cooling, what causes the cooling effect?
إجابة(A)
The faster particles leaving the liquid.
28
What is the primary method of heat transfer in liquids and gases?
29
What is an example of a good thermal insulator?
30
Which of the following is an example of thermal expansion?
إجابة(A)
A metal bridge expanding in the summer heat.
31
What is the relationship between the energy transferred and the mass and specific heat capacity?
إجابة(B)
Energy Transferred = mass x specific heat capacity x temperature change
32
What is the result when the warm air rises over the sea?
33
Which of the following is an example of heat transfer by conduction?
إجابة(B)
Heat spreading through a metal spoon in hot coffee.
34
In a domestic hot water system, how is heat transferred to the water?
35
In which state of matter do particles have the most kinetic energy?
36
How does humidity affect the rate of evaporation?
إجابة(B)
It decreases the rate of evaporation
37
Which material is a good thermal conductor?
38
What is the primary mechanism for heat transfer in a vacuum?
39
Which is the unit for the measurement of specific heat capacity?
40
Which factors affect the rate of heat transfer through a material by conduction?
41
What kind of motion does a gas's particles have?
42
Which color is the best emitter of thermal radiation?
43
What is the main process by which the Earth gains energy from the Sun?
44
What is the relationship between temperature and the expansion of solids and liquids?
إجابة(C)
As temperature increases, solids and liquids expand.
45
What type of energy is required to transform a liquid into a gas?
46
What type of material is used to insulate homes?
47
If 2 kg of ice at 0°C melts to water at 0°C, how much energy is transferred? (Latent heat of fusion for ice = 336,000 J/kg)
48
What is the primary factor influencing the specific heat capacity of a substance?
49
What type of thermometer is most likely used in a cooking oven?
50
What type of surface is a good emitter of thermal radiation?
