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Yr 8 Heat Transfer - Kinetic Molecular Theory

Total questions: 30

Worksheet time: 27mins

Name
Class
Date
1.
Which statement is true?
a)
The quicker a molecule moves, the colder it is.
b)
The slower a molecule moves, the warmer it is.
c)
The quicker a molecule moves, the warmer it is
d)
The movement on molecule don�t affect its temperature
2.

The more energy that particles have, the ___ they move.

a)

slower

b)

faster

3.

The energy of movement is ___.

a)

potential energy

b)

kinetic energy

c)

mechanical energy

4.

These properties describe a ___.

a)

solid

b)

liquid

c)

gas

5.

These properties describe a ___.

a)

solid

b)

liquid

c)

gas

6.

These properties describe a ___.

a)

solid

b)

liquid

c)

gas

7.

Liquid particles have more energy than ___ particles.

a)

solid

b)

gas

8.

The particles of ___ generally have the least amount of energy.

a)

solids

b)

liquids

c)

gases

9.

The properties of liquids include (SELECT ALL THAT APPLY)

a)

definite volume

b)

take the shape of the container

c)

can flow

d)

are relatively incompressible

e)

can diffuse and have surfacre tension

10.

ACTIVATE PRIOR KNOWLEDGE: The phase change from water vapor to liquid water is known as...

a)

vaporization

b)

precipitation

c)

condensation

d)

sublimation

11.

5. ACTIVATE PRIOR KNOWLEDGE: What is it called when a solid turns directly into a gas?

a)

Sublimation

b)

Condensation

c)

Liquid

12.

2. ACTIVATE PRIOR KNOWLEDGE: A change of state from a liquid to a solid is called....

a)

Melting

b)

Freezing

c)

Evaporation

13.

ACTIVATE PRIOR KNOWLEDGE: What is the phase change of a solid to a liquid?

a)

freezing

b)

melting

c)

boiling

d)

condensation

14.
Of these three states of matter, which one has the most kinetic energy? 
a)
Solid 
b)
Liquid 
c)
Gas
15.

Which of the following is a correct description for solids?

a)

closely arranged and in fixed positions

b)

closely arranged and vibrate in fixed positions

c)

closely arranged and can move around

16.

Which statement about the molecules in the gas carbon dioxide is correct?

a)

The molecules are close together.

b)

The molecules are diatomic.

c)

The molecules move randomly.

d)

The molecules all move with the same speed.

17.
Which of the following statements about the kinetic particle theory is not true?
a)
The particles of a gas move faster than those of a liquid.
b)
The particles of a solid have more kinetic energy than those of a gas.
c)
The particles that make up matter are always moving.
d)
The forces of attraction between the particles of a solid are very strong.
18.
What happens when water evaporates?
a)
Particles of the water vapour lose energy to their surroundings.
b)
Particles of the water vapour are spaced further apart.
c)
The speed of the particles of the water increases.
d)
The temperature of the remaining water rises.
19.
The graph below shows part of the cooling curve of a substance. Which row correctly identifies P, Q and R?
a)
P: Gas, Q: Gas and Liquid, R: Liquid
b)
P: Liquid, Q: Gas and Liquid, R: Gas
c)
P: Gas, Q: Liquid, R: Solid
d)
P: Solid, Q: Liquid, R: Gas
20.
A solid compound X was heated steadily for 20 minutes. The graph below shows the change in temperature of X with time. At what temperature did X melt?  
a)
20°C
b)
40°C
c)
90°C
d)
100°C
21.
A solid compound X was heated steadily for 20 minutes. The graph below shows the change in temperature of X with time. What is the boiling point of X?
a)
20°C
b)
40°C
c)
90°C
d)
100°C
22.
Which of the following statements about the particle of a gas is true?
a)
The particles of a gas vibrate about fixed positions.
b)
The particles of a gas are packed close together in a disorderly arrangement.
c)
The particles of a gas are far apart and move in all directions.
d)
The particles of a gas are stationary in an orderly arrangement.
23.

This diagram represents particles in a ______________ state.

a)

Solid

b)

Liquid

c)

Gas

24.

In which state of matter will there be the LARGEST space between molecules?

a)

Solid

b)

Liquid

c)

Gas

25.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
26.
In which state does matter completely fill its closed container?
a)
Gas
b)
Liquid
c)
Solid
d)
Ice
27.
When the temperature of matter decreases the particles ...
a)
speed up and move farther apart
b)
speed up and move closer together
c)
slow down and move farther apart
d)
slow down and move closer together
28.
When thermal energy is added to a substance, the substance's particles move:
a)
More rapidly at an increased diestance from each other.
b)
More rapidly with less distance between each other.
c)
More slowly with a greater distance between each other.
d)
More slowly with a reduced distance between each other.
29.
All matter is made of _____ that are constantly moving.
a)
insulators
b)
particles
c)
convection
d)
pieces of plastic
30.
If an object has particles that are moving very slowly, the object's temperature is probably ______.
a)
hot
b)
small
c)
cold
d)
big

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