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!

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!

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!

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!

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!

condensation vaporisation melting freezing

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.

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.

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

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

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

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

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