04. The composition of air
Why is the atmosphere made up of so few gases?
Outcomes:
- Be able to state which gases are in the atmosphere and what their relative percentages are.
- Be able to experimentally test some of these figures.
Activity: Which gases make up which percentages of the Earth's atmosphere?
Activity: Checking the percentage of oxygen.
If we repeat the experiment, can we:
Explain what is happening and why?
Use this experiment to approximately confirm the percentage of oxygen in air?
Equipment:
tea light (candle)
petri dish
water with blue food colouring
100 cm3 beaker
100 cm3 measuring cylinder
250 cm3 measuring cylinder
Method:
Come up with a plan, test it and then post your results in the Google Sheet.
Results: