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Year 9 Heat transfers

Total questions: 34

Worksheet time: 11mins

Name
Class
Date
1.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
2.
A gas
a)
has a definite shape but no definite volume
b)
has a definite volume but no definite shape
c)
has fast-moving particles
3.
Freezing
a)
Solid to gas
b)
Liquid to solid
c)
Gas to solid
d)
Liquid to gas
4.
Boiling
a)
liquid to gas
b)
gas to solid
c)
gas to liquid
d)
solid to liquid
5.
Which state of matter has a definite shape?
a)
solid
b)
liquid
c)
gas
6.
What is happening when my ice cream changes from a solid to a liquid?
a)
freezing
b)
melting
c)
burning
d)
evaporation
7.
Define a liquid.
a)
Indefinite shape, indefinite volume
b)
Definite shape, definite volume
c)
Found in stars
d)
Definite volume, indefinite shape
8.
The state of matter that has no definite size or shape is
a)
Solid
b)
Liquid
c)
Gas
9.
Particles (molecules) in a ______________________ have more energy than the other states of matter.
a)
gas
b)
solid
c)
liquid
10.
Particles of a liquid
a)
are tightly packed together and stay in a fixed position.
b)
have no viscosity.
c)
decrease in volume with increasing temperature.
d)
are free to move around one another but still touch.
11.
What term describes a solid changing to a gas?
a)
Deposition
b)
Sublimation
c)
Evaporation
d)
Freezing
12.
What is condensation?
a)
gas to solid
b)
gas to liquid
c)
liquid to solid 
d)
solid to liquid 
13.
The speed of the molecules determines the _____.
a)
volume
b)
density
c)
pressure
d)
temperature
14.
Thermal energy is...
a)
heat energy.
b)
the energy of motion
c)
energy of nuclear processes.
d)
an indication of physical change.
15.

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

a)

hotter to colder

b)

colder to hotter

c)

hotter to hotter

d)

colder to colder

16.

Which is an example of heat being transferred by conduction?

a)

a furnace blowing hot air through vents

b)

an ice cube melting in a person’s hand

c)

boiling water transferring heat to noodles

d)

the sun heating water in a swimming pool

17.
Which direction will the heat flow while this person holds a hot cup of tea?
a)
from the cup to her hand
b)
from her hand to the cup
c)
no heat is transferred
18.

If I want two things to stay different temperatures from each other, I need to:

a)

Maximize heat Transfer

b)

Minimize heat transfer

c)

Make them touch a lot

d)

Blow on both with a fan

19.

Near the ceiling of a room the air is warmer. The warm air rises because of ________.

a)

conduction

b)

convection

c)

radiation

20.
Which best describes the process of convection?
a)
Convection is the primary way  heat travels  through rays.
b)
Convection is the primary way heat travels  through metals.
c)
Convection is the primary way heat travels  through appliances.
d)
Convection is the primary way heat travels  through liquids and gasses.
21.

When I emit (send out) IR radiation, my body gets:

a)

Hotter

b)

Cooler

c)

Stays the Same

d)

Humans don't emit radiation

22.

The heat transferred from the Sun to the Earth by waves is called ________.

a)

conduction

b)

radiation

c)

convection

23.

The baby chickens kept warm by the heat lamps. This is an example of ________.

a)

conduction

b)

convection

c)

radiation

24.

The heat transferred from the Sun to the Earth by waves is called ________.

a)

conduction

b)

radiation

c)

convection

25.

What happens when Acetone is poured on your palm ?

a)

The particles gain energy from acetone and evaporate

b)

The particles gain energy from the surroundings and evaporate

c)

The particles gain energy from the palm and evaporate

d)

The particles gain energy from your palm and the surroundings and evaporate

26.

Evaporation occurs only _____

a)

after boiling

b)

after extreme cooling

c)

at surface of a liquid

d)

if boiling occurs at atmospheric pressure

27.

Which can occur at any temperature?

a)

Boiling

b)

Evaporation

c)

Both

28.

Which process is the change of state from liquid to gaseous?

a)

Boiling

b)

Evaporation

c)

Both

29.

Why does evaporation have a cooling effect?

a)

The particles absorb heat from the surroundings

b)

The liquid insulates the material

c)

The liquid is a good heat conductor

30.

When does sweat help to cool you down?

a)

When it is coming out your pores

b)

When it is covering your skin

c)

When it is evaporating from your skin

31.

After a substance sublimates, its particles have less energy.

a)

True

b)

False

32.

Sublimation is...

a)

when a solid changes to a liquid

b)

when a gas turns to a solid

c)

when a liquid turns to a gas

d)

when a solid turns to a gas

33.

Condensation occurs when water vapour....

a)

loses heat

b)

gains heat

34.
Water vapor is one of the components of the air in the atmosphere.  What change causes the vapor in the air to form clouds?
a)
A.  As air rises in the atmosphere, it becomes warmer and cannot hold as much water. 
b)
B. As air cools, water vapor in the air condenses to liquid or solid state. 
c)
C. Air rises, the water becomes heavier and changes form.

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