6-2 What is air?
SWBAT: Describe air as matter. Identify and describe the main gases in air.
cellular respiration - process by which a cell releases energy from food molecules
• Air is a colorless, tasteless, odorless mixture of gases.
• About 78% of air is nitrogen, 21% is oxygen, and 0.04% is carbon dioxide; air also contains varying amounts of water vapor.
• Living things need oxygen to carry out cellular respiration.
cellular respiration - process by which a cell releases energy from food molecules
• Air is a colorless, tasteless, odorless mixture of gases.
• About 78% of air is nitrogen, 21% is oxygen, and 0.04% is carbon dioxide; air also contains varying amounts of water vapor.
• Living things need oxygen to carry out cellular respiration.