Physics for IGCSE & O level - Thermal Effects (Section 6)
1
What is the definition of latent heat?
Atsakymas(B)
The heat absorbed or released during a phase change.
2
Which of the following is NOT a state of matter considered on thermal effects?
3
What type of surface absorbs thermal radiation best?
4
The process of a liquid becoming a solid is known as which?
5
What happens to most solids when their temperature is increased?
6
Which of the following is an example of a good conductor?
7
When ice melts at 0°C, the energy added to the ice is used to?
Atsakymas(B)
Break the bonds between the water molecules.
8
Which of the following are mentioned in the context of expansion?
9
What is the main type of heat transfer involved in the operation of a refrigerator?
Atsakymas(D)
Evaporation and condensation
10
What is the primary mechanism of heat transfer in the Earth's atmosphere?
11
Which of the following best describes convection?
Atsakymas(C)
Heat transfer by the movement of fluids.
12
What causes land and sea breezes?
13
How do insulating materials help to reduce heat loss from a house?
Atsakymas(B)
By reducing convection currents.
14
What is the primary purpose of the experiment showing the heating of the air?
Atsakymas(A)
To show the pressure increases as temperature increases.
15
What is the unit of measurement for temperature on the Kelvin scale?
16
What is the name of the scientist who discovered Brownian motion?
17
What is the primary method of heat transfer in a liquid that is heated from below?
18
What is an example of thermal radiation?
19
What happens to air as it gets closer to the ground on a warm day?
20
What is the relationship between the kinetic energy of particles and the temperature of a substance?
Atsakymas(C)
As temperature increases, kinetic energy increases.
21
What is the role of insulating materials in a home?
Atsakymas(C)
To reduce the rate of heat transfer.
22
Which of the following is not a form of thermal energy?
23
What happens to a gas when it is heated at constant pressure?
24
What is the name given to the energy needed to change a substance from a liquid to a gas?
Atsakymas(C)
Latent heat of vaporization
25
What is meant by absolute zero?
Atsakymas(A)
The temperature at which all molecular motion stops.
26
Which of the following is NOT listed as a topic under 'Thermal effects'?
27
What process explains why clothes dry on a washing line?
28
What happens to the temperature of the Earth if it absorbs thermal radiation faster than it radiates it?
29
What is the effect on the size of the particles when the temperature increases?
30
What property of a material determines its ability to store thermal energy?
31
What is the name given to the motion of particles in a gas or liquid that is caused by collisions with other particles?
32
What happens to the particles in a gas when its temperature increases?
Atsakymas(B)
They move faster and spread further apart.
33
What property of a substance determines how much energy is needed to change its temperature?
34
What happens to the volume of a gas when the pressure increases, assuming the temperature is constant?
35
What type of surface best reflects thermal radiation?
36
What is the unit of measurement for specific heat capacity?
37
Atsakymas(C)
Heat absorbed or released during a change of state.
38
How does the amount of mass affect the energy transferred during a temperature change?
Atsakymas(B)
The mass is directly proportional to the energy transferred.
39
What is the process that explains the movement of small particles in a liquid or gas?
40
Which of the following is an example of convection?
Atsakymas(C)
Wind blowing across a field.
41
What is a key difference between solids and gases regarding their particles?
Atsakymas(A)
Solids have fixed positions while gases do not.
42
What is an example of the application of latent heat of fusion?
43
What is the relationship between temperature and the average kinetic energy of particles?
Atsakymas(B)
They are directly proportional
44
What is the process by which a substance changes from a solid to a liquid?
45
What is absolute zero in Celsius?
46
What is the most effective type of surface for emitting and absorbing thermal radiation?
47
What is the primary method of heat transfer in a gas?
48
What type of energy is associated with the motion of particles?
49
Which of these factors doesn't affect the rate of evaporation?
50
What would be the effect of increasing the temperature of an iron rod?
Atsakymas(A)
It's length would increase.
