Burning needs air
Answers are for parents and teachers.
1
Draw a candle in a jar with a lid and say why the flame will go out. Do not light one.
The flame has no fresh air coming in, so it dies down.
2
Ask an adult where fresh air comes into your kitchen when a fire or cooker is on.
Answers differ, for example a window or a vent. Fresh air is needed.
3
Write two sentences: one about nitrogen and one about oxygen.
Nitrogen is about four fifths of air and does not help burning. Oxygen is about one fifth and helps burning.
4
Make a poster about fire safety that says why a closed room needs air.
Answers differ. It should say fires need fresh air and used gases must leave.
5
Blow gently across a strip of paper held at one end. What do you notice? What does moving air do?
The paper lifts or moves. Moving air has an effect; a fan can push fresh air.