2. What is oxygen?
a. Oxygen is an element
b. Colorless, odorless and tasteless gas
c. Denser than air
d. very poor conductor of heat and electricity
4. Oxygen Cycle
a. Step one
i. Plants release oxygen into the atmosphere as a by-product of photosynthesis
c. Definition- The process in which green plants use the energy from the sun to make carbohydrates from carbon dioxide and water in the presence of chlorophyll
5. Steps to the photonthesis
a. Planets pull the carbon off the CO2 and use the carbon in glucose. The plants do not need the oxygen for this because they get it from the water.
b. Plants release the oxygen (o2) back into the atmosphere.
c. Other organisms use the free oxygen for respiration
6. Oxygen Cycle
a. Step two
i. Animals take in the oxygen through the process of respiration. ii. Animals then break down sugars and food.
a. Process by which an organism exchanges gases with its environment
b. Process → oxygen is abstracted from air, transported to cells for the oxidation of organic molecules while CO2 and H2O, the products of oxidation, are returned to the environment
c. Oxygen is used to split glucose apart, releasing energy, water and carbon dioxide in our cells.
8. Oxygen Cycle
a. Step Three
i. Carbon dioxide is released by animals and used in plants in photosynthesis. ii. Oxygen is balanced between the atmosphere and the ocean
9. How the oxygen cycle contribute to plants
a. The oxygen cycle begins with plants and photosynthesis
b. Through photosynthesis, plants convert the energy from the sun and water into carbohydrates and oxygen
c. During the day, the plans convert carbon dioxide into oxygen
d. During the night, plants convert oxygen into carbon dioxide to maintain their metabolism
10. How the oxygen cycle contributes to living organisms
a. Humans and animals breathe in oxygen and breathe out carbon dioxide through their processes of