Matter

Question 1

What is density

Answer 1

It is the amount of mass in a volume

Question 2

What are the common units for density

Answer 2

G/cm to the power 3

Kg/cm to the power 3

Question 3

How do you calculate density

Answer 3

Density= mass/volume

Question 4

How do you calculate mass

Answer 4

Mass= volume*density

Question 5

How do you calculate volume

Answer 5

Volume=mass/density

Question 6

What is brownian motion

Answer 6

Brownian motion is when particles collide with fluids(liquids or gasses) which send them in a random direction

Question 7

What is a fluid

Answer 7

A liquid or a gas

Question 8

Describe the arrangement of particles in a solid

Answer 8

Very close together, high density

Question 9

Describe the movement of the particles in a liquid

Answer 9

Close together, high density

Question 10

Describe the movement of the particles in a gas

Answer 10

Far apart, low density

Question 11

Describe the movement of the particles in a solid

Answer 11

Vibrate in a fixed position

Question 12

Describe the movement of the particles in a liquid

Answer 12

Move fairly quickly around each other

Question 13

Describe the movement of the particles in a gas

Answer 13

Move quickly in random directions

Question 14

Describe the forces between the particles in a solid

Answer 14

Very Strong forces, attract particles

Question 15

Describe the forces between the particles in a liquid

Answer 15

Strong forces

Question 16

Describe the forces between the particles in a gas

Answer 16

Weak forces

Question 17

What is a physical change

Answer 17

It is a change in which the substances’ properties change but no knew substance is formed

Question 18

What is a chemical change

Answer 18

It is a change in which a new substance has been formed because chemical bonds are broken and new ones formed

Question 19

What is the state change called when a substance goes from a solid to a liquid

Answer 19

Melting

Question 20

What is the state change called when a substance goes from a liquid to a solid

Answer 20

Freezing

Question 21

What is the state change called when a substance goes from a liquid to a gas

Answer 21

Evapouration

Question 22

What is the state change called when a substance goes from a gas to a liquid

Answer 22

Condensation

Question 23

What is the state change called when a substance goes from a solid to a gas

Answer 23

Sublimation

Question 24

What is conduction

Answer 24

Conduction Is a type of heat transfer where heat energy is transferred to neighbouring particles

Question 25

What is convection

Answer 25

Convection is a type of heat transfer where heat energy is carried by particles

Question 26

What state does conduction occur in

Answer 26

Solids

Question 27

What state does convection occur in

Answer 27

Fluids(liquids and gasses)

Question 28

What is radiation

Answer 28

Radiation dips a type of heat transfer that does not require particles(can happen in a vacuum)

Question 29

Which types of surface absorb heat energy

Answer 29

Matte black

Question 30

Which type of surface reflects heat energy

Answer 30

Shiny white/silver

Question 31

Why is double glazing good

Answer 31

Because it creates a vacuum between the two pairs of glass meaning heat can’t escape by conduction or convection and also air is a good insulator

Question 32

Does a warm substance transfer its heat to a cooler substance

Answer 32

Yes

Question 33

What happens to dye in water whilst the water is being heated up

Answer 33

The dye gets carried by the water and as the water is becoming less dense as it is heating up, it rises to the surface carrying the dye with it. Once the water at the surface cools down the particles loose kinetic energy so sink back down to the bottom carrying the dye with it