11. Q1 a. i) Wet clothing on a washing line drying out:
Vaporisation (LIQUID to GAS)
ii) Hailstones form: Freezing (LIQUID to SOLID)
iii) snowflakes turn into liquid water : Melting (SOLID to LIQUID)
The mass of water particles stays the same,
the volume of water is less than the volume of ice
so the density of water is greater than the density of ice!

12. Q1 a. i) Wet clothing on a washing line drying out:
Vaporisation (LIQUID to GAS)
ii) Hailstones form: Freezing (LIQUID to SOLID)
iii) snowflakes turn into liquid water : Melting (SOLID to LIQUID)
The mass of water particles stays the same,
the volume of water is less than the volume of ice
so the density of water is greater than the density of ice!

13. Q1 a. i) Wet clothing on a washing line drying out:
Vaporisation (LIQUID to GAS)
ii) Hailstones form: Freezing (LIQUID to SOLID)
iii) snowflakes turn into liquid water : Melting (SOLID to LIQUID)
The mass of water particles stays the same,
the volume of water is less than the volume of ice
so the density of water is greater than the density of ice!

14. Q1 a. i) Wet clothing on a washing line drying out:
Vaporisation (LIQUID to GAS)
ii) Hailstones form: Freezing (LIQUID to SOLID)
iii) snowflakes turn into liquid water : Melting (SOLID to LIQUID)
The mass of water particles stays the same,
the volume of water is less than the volume of ice
so the density of water is greater than the density of ice!

15. Q1 a. i) Wet clothing on a washing line drying out:
Vaporisation (LIQUID to GAS)
ii) Hailstones form: Freezing (LIQUID to SOLID)
iii) snowflakes turn into liquid water : Melting (SOLID to LIQUID)
The mass of water particles stays the same,
the volume of water is less than the volume of ice
so the density of water is greater than the density of ice!

16. condensation
vaporisation
melting
freezing

17. condensation
vaporisation
melting
freezing
Q3 a. When an ice cube melts the particles gain energy and break free
from their fixed positions ( they don’t speed up unless the temp
rises), and move about at random but remain in contact with
each other.

18. condensation
vaporisation
melting
freezing
Q3 a. When an ice cube melts the particles gain energy and break free
from their fixed positions ( they don’t speed up unless the temp
rises), and move about at random but remain in contact with
each other.
b. Water vapour particles reduce their speed and distance apart to
make contact and move around at random in the liquid state.

19. Q4. Liquids and solids are much denser than gases
* The mass of particles remains the same

20. Q4. Liquids and solids are much denser than gases
* The mass of particles remains the same
* density = mass
volume

21. Q4. Liquids and solids are much denser than gases
* The mass of particles remains the same
* density = mass
volume
* The particles in liquids and solids are in contact with each other

22. Q4. Liquids and solids are much denser than gases
* The mass of particles remains the same
* density = mass
volume
* The particles in liquids and solids are in contact with each other
* The particles in a gas are very widely spaced apart

23. Q4. Liquids and solids are much denser than gases
* The mass of particles remains the same
* density = mass
volume
* The particles in liquids and solids are in contact with each other
* The particles in a gas are very widely spaced apart
* The volume occupied by the gas particles is much greater