1. Lesson Starter
Draw a picture and write a description of the particles in:
a) A solid
b) A liquid
c) A gas
Write down two examples (not involving water) of when solids change to a liquid
What is the name for when solids change to liquids?
What is the name for when liquids change to solids?

2. What’s the matter?
Lesson 6

3. Investigating change of state- practical
Lesson 6
Investigating change of state- practical

4. Liquids turn into solids- FREEZING
What we know so far..
Solids turn into liquids- MELTING
Liquids turn into solids- FREEZING

5. Apparatus Goggles Bunsen Burner Tripod Beaker Test tube Dropper
Cotton wool
Nail varnish remover
Beaker of crushed ice

6. Method Light your Bunsen burner and leave it on the safety flame
Measure 150 mls of water into your beaker
Place beaker on tripod stand and heat using the flame from the Bunsen until it almost boils then TURN THE BUNSEN OFF
Put 5 drops of nail varnish remover into the test tube
Bung the top of the test tube loosely
Sit the test tube in the warm water and watch what happens- describe what you see in your booklet
Take the test tube out of the water and place in the beaker of crushed ice- watch what happens and describe what you see

7. What did you see?
What did you see when you heated the nail varnish remover?
What does this tell you about heating a liquid?
What did you see when you cooled the test tube?
What does this tell you about cooling a gas?

8. Boiling
When we heated the nail varnish remover- we gave it more energy
The particles spread out
The state changed from liquid to gas
This is called BOILING or EVAPORATION

9. Condensation
When we cooled the nail varnish remover the particles had less energy
Particles couldn’t move around as much or as freely
The state changed from a gas to a liquid
This is called CONDENSATION

10. Questions
Answer the questions on page 13 of your “What’s the matter?” booklet

11. Homework
Due in Monday 2nd November: exercise on page 9 of What’s the matter booklet