6_Model_of_Matter

Question 1

What is all matter made from?

Answer 1

Tiny particles.

Question 2

What are the spaces between particles like in solids?

Answer 2

Very close together

Question 3

How are the particles in liquids arranged?

Answer 3

They are close together but can move around each other.

Question 4

What are the spaces between particles like in gases?

Answer 4

Very far apart and move around freely

Question 5

What happens to a material when it is heated?

Answer 5

It expands because particles move more quickly and push apart.

Question 6

What happens to a material when it is cooled?

Answer 6

It contracts because particles move more slowly and come closer together.

Question 7

What is the process called when a solid changes to a liquid?

Answer 7

Melting.

Question 8

How can you separate a soluble solid from a liquid?

Answer 8

By evaporation, for example, separating salt from water.

Question 9

Why can’t particles in a solid move around freely?

Answer 9

They are held together by strong bonds.

Question 10

Can the particles in a solid move at all?

Answer 10

Yes, they can vibrate back and forth in one place.

Question 11

Which of shape and volume are fixed in a solid?

Answer 11

Both

Question 12

Which of shape and volume are fixed in a liquid?

Answer 12

Volume is fixed, but shape depends on the container

Question 13

Which of shape and volume are fixed in a gas

Answer 13

Neither. Both depend on the container

Question 14

Why can you squash a gas but not solids or liquids?

Answer 14

Gas particles are far apart but particles in solids and liquids are close together

Question 15

What happens when a material is heated?

Answer 15

It expands

Question 16

Why does a material expand on heating?

Answer 16

Because the particles vibrate more quickly and push each other apart

Question 17

What happens when a material is cooled?

Answer 17

It contracts

Question 18

Why does a material contract on cooling?

Answer 18

The particles vibrate less quickly and push each other apart less

Question 19

When dissolving something, what is thing you are trying to dissolve called?

Answer 19

The solute

Question 20

When dissolving something, what is thing you are dissolving into called?

Answer 20

The solvent

Question 21

When dissolving something, what is thing you have at the end called?

Answer 21

The solution

Question 22

What does boiling point mean?

Answer 22

The temperature at which a liquid becomes a gas.

Question 23

What does melting point mean?

Answer 23

The temperature at which a solid becomes a liquid.

Question 24

What is the boiling point of water?

Answer 24

100 degrees celsius

Question 25

What is the melting point of water?

Answer 25

zero degrees celsius

Question 26

What is the other way water can become a gas other than boiling?

Answer 26

It can evaporate below its boiling point.

Question 27

What is diffusion?

Answer 27

The moving and mixing of particles.

Question 28

Does diffusion happen faster in a gas or a liquid?

Answer 28

A gas

Question 29

Why does diffusion happen faster in a gas?

Answer 29

Because gas particles are very far apart so there is space for particles to move between.

Question 30

Why does diffusion happen slower in a liquid?

Answer 30

Because there are only small spaces between particles.

Question 31

What word describes a substance that can dissolve?

Answer 31

Soluble

Question 32

What word describes a substance that cannot dissolve?

Answer 32

Insoluble

Question 33

What is the process called for separating an insoluble substance from a liquid?

Answer 33

Filtration

Question 34

What is the name of the liquid left behind after filtration?

Answer 34

The filtrate

Question 35

What is the name of the solid left behind after filtration?

Answer 35

The residue

Question 36

What is the process called for separating a soluble solid from a liquid?

Answer 36

Evaporation

Question 37

What is the process called for separating mixtures of inks and dyes?

Answer 37

Chromatography