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WorksheetsFinal WA3 Revision 2023
Total questions: 61
Worksheet time: 1hrs 4mins
How much power is required to lift a 30N chair, as high as 0.20m in 2s?
1 W
7 W
3 W
15 W
What is the arrangement of particles in a liquid?
Particles slide over each other.
Particles vibrate about their fixed positions.
Particles are closely packed in an orderly manner.
Particles are closely packed in an disorderly manner.
How will you describe the movement of gaseous particles?
Particles are sliding over each other.
Particles are moving at high speeds in all direction.
Particles are far apart and arranged randomly.
Particles are far apart but arranged orderly.
What is the movement of particles in a solid?
Particles slide over each other.
Particles vibrate about their fixed positions.
Particles are closely packed in an orderly manner.
Particles move quickly and randomly in all directions.
What is the movement of particles in a liquid?
Particles slide over each other.
Particles vibrate about their fixed positions.
Particles move fast in all directions.
Particles are closely packed in an disorderly manner.
Which diagram describes particles in a solid?
What happens when a gas is compressed?
Spaces between particles become smaller
Particle size become smaller
There will be less particles.
What is the boiling point of the substance given the cooling curve below?
- 40 oC
0 oC
100 oC
130 oC
The melting point of the sample is
-60 ºC
-100 ºC
60 ºC
100 ºC
At higher temperatures
particles in an object have less energy
particles in an object move faster
particles get closer and stick together
particles in an object move more slowly
Which has the strongest Intermolecular Forces?
gas
Liquid
solid
Which of the substances is a solid at 30 oC?
A
B
C
D
E
What happens to the temperature as a liquid boils?
It will continue to increase.
It will start to decrease.
It will remain constant at 100 oC.
It will remain constant at its boiling point
Which of the following always happens when a substance is heated?
Temperature increases
Kinetic energy of particles increases
Potential energy of particles increases
Internal energy increases
During melting and boiling, energy is ___________________________.
absorbed to overcome intermolecular forces
absorbed to allow the molecules to come closer together
released to overcome intermolecular forces
released to allow the molecules to come closer together
During freezing and condensation, energy is ___________.
absorbed
released
During freezing and condensation , energy is ___________________________.
absorbed to overcome intermolecular forces
absorbed to allow the molecules to come closer together
released to overcome intermolecular forces
released to allow the molecules to come closer together
When a liquid evaporates, some molecules escape from it and its temperature changes. Where do the molecules escape from and what is the effect of evaporation on the liquid temperature?
A
B
C
D
Some statements about boiling and evaporation are below. Which is incorrect?
Boiling occurs at the liquid surface.
Boiling forms bubbles as liquid turns to gas.
Evaporation occurs at any temperature.
Rate of evaporation is affected by exposed surface area of the liquid.
the total potential and kinetic energy of all the particles in an object
internal energy
heat
temperature
the measure of the average kinetic energy of the particles in an substance
thermal energy
heat
temperature
Which statement is correct?
heat is transferred from a warm object to a cool object until they both balance out
heat is transferred from a cool object to a warm object until they both balance out
hot stays hot and cold stays cold
When a substance is heated from 25 oC to 50 oC,
its internal kinetic energy decreases.
its internal potential energy decreases.
its internal kinetic energy increases.
its internal potential energy increases.
When a substance is cooled from 40 oC to 10 oC,
its internal kinetic energy decreases.
its internal potential energy decreases.
its internal kinetic energy increases.
its internal potential energy increases.
When a substance is boiling,
its internal kinetic energy decreases.
its internal potential energy decreases.
its internal kinetic energy increases.
its internal potential energy increases.
When a substance is condensing,
its internal kinetic energy decreases.
its internal potential energy decreases.
its internal kinetic energy increases.
its internal potential energy increases.
When a substance is cooled from gas to liquid,
both its internal potential energy and total internal energy decrease.
both its internal potential energy and total internal energy increase.
its internal potential energy increases but total internal energy decreases.
its internal potential energy decreases but total internal energy increases
Choose the most appropriate statement that describes thermal energy transfer.
Heat flows from a hotter body to a colder body, and coldness flows in the
opposite direction.
Conduction is one process of thermal energy transfer that involves the vibration
of particles.
There is no heat flow when two bodies are in thermal equilibrium.
Radiation refers to the process of heat transfer by the movement of fluid due to
density differences.
In the early morning, Ali touches the surface of a car body and finds that it is cold. This is because the metallic surface of the car is a good
thermal conductor and it conducts heat from the surface to Ali’s hands.
thermal conductor and it conducts heat from Ali’s hands to the surface.
thermal insulator and it does not conduct heat from the surface to Ali’s hands
easily.
thermal insulator and it does not conduct heat from Ali’s hands to the surface
easily.
A metal gauze is wrapped around a piece of ice and dropped into a boiling tube containing water. The top of the boiling tube is then heated up by a Bunsen burner until the water near the surface begins to boil, as shown in the diagram below. During this time, the ice is observed to remain largely un-melted. This experiment shows that
ice is a poor conductor of heat.
water is a good conductor of heat.
water is a poor conductor of heat.
metal gauze is a good conductor of heat.
A lamp has been switched on for a while. Siti, who is sitting beside it, begins to feel its heat. This heat transfer is largely due to
conduction from the lamp through the air to Siti.
convection of the air heated by the lamp.
radiation from the lamp to Siti.
free electron diffusion from the lamp to Siti.
Two similarly sized metal cans have different outer casings. One is painted dull and black, and the other is painted shiny and silver. Both cans are filled with equal amounts of water and heated to the same temperature after which they are left to cool to room temperature. Which of the following statements best describes the cooling process of the water?
Water in the dull and black can takes a shorter time to cool because dull and black surfaces are good absorbers of radiation.
Water in the dull and black can takes a longer time to cool because dull and black surfaces are good emitters of radiation.
Water in the shiny and silver can takes a shorter time to cool because shiny and
silver surfaces are bad absorbers of radiation.
Water in the shiny and silver can takes a longer time to cool because shiny and
silver surfaces are bad emitters of radiation.
Which of the following is the best thermal insulator?
Still air
Wood
Insulating plastic
Water
Which diagram shows the movement of air as the room is heated?
Which statement is correct?
How does the heat from the fire reach each child’s hands?
Why does convection take place in a liquid when it is heated?
Liquids expand when they are heated.
Liquids start to bubble when they get close to boiling point.
Molecules in the liquid expand when they are heated.
Molecules near to the surface of the liquid escape into the air.
Which statement about the transfer of thermal energy is correct?
Convection can occur in air, but only when the air is trapped.
Convection can only occur in a gas.
Radiation cannot occur in air.
Radiation can occur in a vacuum, but convection cannot.
Four objects, made of the same material and having the same mass, are at the same temperature. The objects have different surfaces and different surface areas.
Which object emits infra-red radiation at the greatest rate?
A
B
C
D
