WorksheetsThermal Physics (I): About KPT
Total questions: 40
Worksheet time: 24mins
Particles in a liquid are loosely bound, can change their relative positions and hence...
makes an excellent conductor
Which of the following states of matter has the LOWEST level of energy?
Solid
Liquid
Gas
Plasma
What happens to the average kinetic energy of matter when it is heated?
It increases
It stays the same
It decreases
It cannot be determined
What state of matter is shown in the image?
Solid
Liquid
Gas
Thermal Energy
At what temperature does matter change phases from a solid to a liquid?
Melting Point
Boiling Point
Condensation Point
0 degrees Celsius
If the particles of an object are moving fast, the temperature would be...
High
Low
When the temperature of matter decreases, the particles ...
speed up and move farther apart
slow down and move farther apart
speed up and move closer together
slow down and move closer together
When thermal energy is added to a substance, the particles in the substance move:
More rapidly at an increased distance from each other.
More slowly with a greater distance between each other.
More rapidly with less distance between each other.
More slowly with a reduced distance between each other.
What is the measure of the average kinetic energy of the particles in an object?
Heat
Motion
Thermal Energy
Temperature
Particles in a solid move __________ than particles in a gas
faster
slower
more randomly
more fluidly
Particles in a liquid move __________ than particles in a solid
faster
slower
less randomly
less fluidly
Which of the following is a correct description for solids?
closely arranged and in fixed positions
closely arranged and vibrate in fixed positions
closely arranged and can move around
Which statement about the molecules in carbon dioxide gas is correct?
The molecules are close together.
The molecules are diatomic.
The molecules move randomly.
The molecules all move with the same speed.
Which of the following sentences are true about solids?
Solids are rigid, have a fixed shape but not a fixed volume
Solids are not rigid, have a fixed shape and no fixed volume
Solids are rigid, have a fixed shape and a fixed volume
An inflated balloon is placed in a refrigerator. Which statement describes the movement of the gas particles in the balloon after some time?
The particles move more slowly, one closer together and settle into fixed positions.
This diagram represents particles in a ______________ state.
Solid
Liquid
Gas
In which state of matter will there be the LARGEST space between molecules?
Solid
Liquid
Gas
The state of matter with definite volume but no definite shape.
solid
liquid
gas
plasma
The kinetic model of matter states that
atoms and molecules move in continuous and non-random motion.
atoms and molecules move in continuous and random motion.
the kinetic energies of atoms and molecules increase with increasing temperature.
the pressure of atoms and molecules is due to the collision of these particles with the walls of the container they are in.
Using a microscope, Peter observes that some pollen grains suspended in water move in an irregular manner. This is due to the
pollen grains colliding with one another.
pollen grains repelling one another.
bombardment of pollen grains by water molecules.
bombardment of water molecules by pollen grains.
Choose the most appropriate description for the relative forces of attraction between particles in a solid, a liquid and a gas.
A
B
C
D
Solids have high densities relative to liquids because
1 the particles in solids are far apart.
2 the particles in solids have large masses.
3 the particles in solids do not move about.
1 only
2 only
2 and 3 only
None of the above
Which statement describes the arrangement and movement of particles in a solid?
A
B
C
D
Brownian motion shows that
particles in all states of matter are in constant, random motion.
particles in a fluid are in continuous, random motion.
particles in solids vibrate about fixed positions.
particles in gases are farther apart compared to in liquids.
Which statement best describes the "internal energy" store of a substance?
PE + KE of its particles
GPE + KE of its particles
GPE + KE of the substance
PE + KE of the substance
Which statement is true when a substance "boils"?
The internal energy of the substance increases due to increase in KE.
The molecules move more vigorously.
The molecules come closer together.
The internal energy of the substance increases due to increase in PE.
Which statement is true about water freezing to become ice at 0 oC ?
The molecules move less slowly and eventually stop moving in fixed positions.
The molecules come closer together, reducing PE.
The molecules have lower KE and hence temperature drops.
The molecules form bonds and there is no change in internal energy.
Rate of evaporation increases as?
exposed surface area of liquid increases
exposed surface area of liquid decreases
movement of air above surface of liquid decreases
atmospheric pressure increases
Evaporation takes place at any temperature
True
False
Evaporation happens
throughout the liquid
at the surface of a liquid
The higher the surrounding temperature, the __________________ the rate of evaporation of water.
lower
higher
same
changes
What is Humidity ?
Amount of water present in air
Amount of water vapour present in air
Amount of energy present
Which statement about Evaporation is correct?
Evaporation causes internal energy to drop.
Evaporation causes internal energy to rise.
Evaporation does not change internal energy.
Evaporation requires energy transferred into the internal (thermal) store.
Which statement is correct about boiling?
Internal energy remains constant.
Internal energy increases because KE and PE increases.
Internal energy increases because PE increases.
Internal energy increases because KE increases.
