The Atmosphere

Question 1

What is the air made up of

Answer 1

Oxygen Nitrogen Argon Carbondioxide Water vapour Other gases

Question 2

Give the percentage of the air that the airs gases make up

Answer 2

Oxygen-21% Nitrogen-78% Argon,carbon dioxide, water vapour, other gases- 1%

Question 3

Explain the atmosphere

Answer 3

The atmosphere is the layer of gases around the Earth.

Question 4

Explain briefly the method of the experiment To show that approximately one-fifth of air is oxygen (O2)

Answer 4

1. Put steel wool into the bottom of a graduated cylinder 2. Invert the cylinder in a basin of water. 3. Leave for one week. 4. Measure the height that the water rises up the cylinder.

Question 5

Explain the results of the experiment To show that approximately one-fifth of air is oxygen (O2)

Answer 5

• The steel wool rusts, and uses up the oxygen in the graduated cylinder. - Water is drawn up to replace the oxygen - The height the water rises is approximately one-fifth of the overall height of the cylinder above the water.