WorksheetsP2 - Thermal physics - Exam-style questions
Total questions: 43
Worksheet time: 30mins
The particles in a solid can...
Move freely
Have no bonds
Vibrate about a fixed point
Melt
Brownian motion is defined as...
The random movement of small particles due to collisions with larger particles
The random movement of particles in a solid due to collisions with smaller surrounding particles
The random movement of particles around us
The random movement of particles in a fluid due to collisions with smaller surrounding particles
During a change of state the temperature of a substance...
Stays the same
Increases
Decreases
Evaporation...
Happens to every molecule in a boiling liquid
Only happens to the particles at the surface
Will increase with a smaller surface area
Is the same as boiling
Which substance expands most when heated?
Solid
Liquid
Gas
All the same
When gas is heated it becomes...
More dense
Heavier
Less dense
Lighter
Which colour absorbs the most heat?
Black
White
Yellow
Silver
A metal rod is heated at end X. Why does end Y of the metal rod become hot?
Energy is transferred from end X of the rod to end Y by vibration of positive ions and by
movement of electrons.
Energy is transferred from end X of the rod to end Y by movement of positive ions only.
Energy is transferred from end X of the rod to end Y by vibration of positive ions only.
Energy is transferred from end X of the rod to end Y by movement of electrons only.
The liquid level in a thermometer rises when the thermometer is placed in hot water. What causes this?
The liquid contracts.
The liquid evaporates.
The liquid expands.
The liquid freezes.
Which statement about boiling and evaporation is correct?
Boiling requires a supply of thermal energy but evaporation does not.
Evaporation takes place at the surface of a liquid but boiling takes place throughout the liquid.
When water boils in a kettle, its temperature decreases.
When water evaporates, its temperature increases.
Why are small gaps left between the metal rails of a railway track?
to allow for expansion of the rails on a hot day
to allow for contraction of the rails on a hot day
to allow for expansion of the rails on a cold day
to allow for contraction of the rails on a cold day
Which statement about evaporation is correct?
evaporation causes the temperature of the remaining liquid to decrease
evaporation does not occur from a cold liquid near its freezing point
evaporation does not occur from a dense liquid, such as mercury
evaporation occurs from all parts of a liquid
A swimmer feels cold after leaving warm water on a warm, windy day. Why does she feel cold even though the air is warm?
the less energetic water molecules on her skin escape quickly
the more energetic water molecules on her skin do not escape quickly
the water on her skin does not evaporate quickly enough to keep her warm
the water on her skin evaporates quickly and cools her skin
The diagram shows a vacuum flask used to keep liquid hot. How does thermal energy pass through the vacuum?
conduction only
convection only
radiation only
conduction and convection
The 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?
The air contracts and become less dense
The air contracts and becomes more dense
The air expands and becomes less dense
The air expands and becomes more dense
In 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?
A
B
C
D
Which row shows the surface that is the better absorber and the surface that is the better emitter of infra-red radiation?
A
B
C
D
