Solids, Liquids and Gases Test Year 7

Question 1

What has a particle formation that is close together and in a regular pattern?

Answer 1

A solid

Question 2

What is the act of a gas becoming a solid?

Answer 2

Deposition

Question 3

What can be compressed?

Answer 3

A gas

Question 4

What is diffusion?

Answer 4

The movement of particles from higher to lower concentrations. Particles must be freely and randomly moving about for diffusion to occur.

Question 5

What state is the stearic acid in?
Boiling point: 232°C
Melting point: 69.3 °C
Current temperature: 134°C

Answer 5

Liquid

Question 6

What are the three states of matter?

Answer 6

Solid, liquid, gas

These states of matter are fundamental classifications based on the arrangement and energy of particles.

Question 7

What is melting?

Answer 7

Change of state from solid to liquid

Melting occurs when a solid absorbs heat and transitions into a liquid state.

Question 8

What is freezing?

Answer 8

Change of state from liquid to solid

Freezing happens when a liquid loses heat and transitions into a solid state.

Question 9

What is evaporating?

Answer 9

Change of state from liquid to gas

Evaporation occurs when a liquid gains enough energy to transition into a gas.

Question 10

What is condensing?

Answer 10

Change of state from gas to liquid

Condensation takes place when a gas loses energy and transitions into a liquid.

Question 11

What is subliming?

Answer 11

Change of state from solid to gas or from gas to solid

Sublimation occurs without passing through the liquid state.

Question 12

What is a cooling curve?

Answer 12

A graph that shows how the temperature changes when a gas, liquid, or solid is allowed to cool down

Cooling curves illustrate phase changes and temperature variations over time.

Question 13

What is diffusion?

Answer 13

The movement of particles from higher to lower concentrations

For diffusion to occur, particles must be freely and randomly moving.

Question 14

What does it mean to expand?

Answer 14

Increase in size

Expansion typically occurs when substances are heated.

Question 15

What does it mean to contract?

Answer 15

Decrease in size

Contraction usually happens when substances are cooled.

Question 16

What is density?

Answer 16

How heavy something is for its size

Density can be calculated by dividing mass by volume.

Question 17

What factors influence the density of a substance?

Answer 17

Mass of the particles, how closely spaced they are

Density changes when substances change state and when they are heated or cooled.

Question 18

What is a particle?

Answer 18

The smallest part of a substance

Particles include atoms and molecules.

Question 19

What does it mean to calibrate a measuring instrument?

Answer 19

Fixing known points and marking a scale between these fixed points

Calibration ensures accuracy in measurements.

Question 20

What state of matter has particles like dancers on a crowded dance floor?

Answer 20

Liquid

Question 21

What are the three main states of matter?

Answer 21

Solids, liquids, and gases.

Question 22

True or False: Solids have a definite shape and volume.

Answer 22

True.

Question 23

Fill in the blank: In a liquid, particles are _____ than in a solid.

Answer 23

closer together but can move past each other.

Question 24

What state of matter has a definite volume but no definite shape?

Answer 24

Liquid.

Question 25

Which state of matter is characterized by particles that are far apart and move freely?

Answer 25

Gas.

Question 26

What happens to the particles in a solid when it is heated?

Answer 26

They vibrate more and may eventually change to a liquid.

Question 27

Multiple Choice: Which of the following is NOT a characteristic of gases? A) Compressible B) Definite shape C) High energy D) Fill their container

Answer 27

B) Definite shape.

Question 28

True or False: Liquids can be compressed easily.

Answer 28

False.

Question 29

What is the process called when a solid turns directly into a gas?

Answer 29

Sublimation.

Question 30

Fill in the blank: The process of a gas turning into a liquid is called _____

Answer 30

condensation.

Question 31

What term describes the amount of space an object occupies?

Answer 31

Volume.

Question 32

What is the term for the state change from liquid to solid?

Answer 32

Freezing.

Question 33

Fill in the blank: The particles in a _____ are tightly packed and vibrate in place.

Answer 33

solid.

Question 34

What is the main difference between a liquid and a gas?

Answer 34

Liquids have a definite volume but no definite shape, while gases have neither a definite shape nor volume.

Question 35

What do we call the temperature at which a solid becomes a liquid?

Answer 35

Melting point.

Question 36

What is the process called when a liquid turns into a gas?

Answer 36

Evaporation.

Question 37

Multiple Choice: Which state of matter can flow? A) Solid B) Liquid C) Gas D) Both B and C

Answer 37

D) Both B and C.

Question 38

What happens to the volume of a gas when it is compressed?

Answer 38

The volume decreases.

Question 39

Fill in the blank: The change from gas to solid is called _____

Answer 39

deposition.

Question 40

What is the term for the temperature at which a liquid becomes a solid?

Answer 40

Freezing point.

Question 41

True or False: A liquid has a fixed shape.

Answer 41

False.