combined GCSE chemistry

the properties of gases in the earths atmosphere:

• 78% nitrogen
• 21% oxygen
• small quantities of other gases this includes, noble gases, carbon dioxide and water vapour

importance of atmospheric gases:

the earths atmosphere contains nurmerous gases, each of which has an effect o the success of our planets organisms

oxygen:

• oxygen is a reactant in respiration- a chemical reaction that takes place in all living cells
• as humans, we breathe oxygen into our lungs. from there, it diffuses into our blood and is carried to all the cells in our body

carbon dioxide and water vapour:

• carbon dioxide and water vapour are greenhouse gases
• greenhouse…