Science: Oxygen Cycle
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Science: Oxygen Cycle
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25 Questions

1. Dissolved oxygen (DO), oxygen gas (O2)

2. Write the equation for respiration

3. Most _____ comes from photosynthesis by plants on land and _____ on the oceans surface

4. Plants, animals, and people need O2 to breath

5. cellular respiration

6. Bodies of water, plants, animals, soil

7. Some ___ is made in the _______, when sunlight _____ water

8. More clarity = more DO

9. Rooted plants, algae, phytoplankton (single called floating plants), and Cyanobacteria

10. respiration (carbohydrates+oxygen—>carbon dioxide+water+energy) and decomposition

11. photosynthisis:

12. Most ___ on ____ is stored in _____ in the Earth's _____ and is _____ for use

13. Decomposition

14. Oxygen is found everywhere on earth, from Earth's _____ (rocks) to the ____ where it is dissolved.

15. Not enough oxygen for aquatic animals to breath

16. Organic matter (leaf litter, sewage, dead algae)

17. Oxygen is vital for _____ by animals, a process which produces CO2 and water

18. Higher temperature = less DO water can hold

19. Faster = more DO (rapids, waterfalls, and waves help)

20. Does the ocean contribute to the Oxygen cycle?

21. More O during the day because the suns energy causes photosynthesis, less at night

22. Biotic factors - ____ examples: ____ & ____ (including plants and animals that have ___)

23. Photosynthesis, diffusion (random motion of molecules), and aeration (oxygen gas gets mixed into water)

24. Oxygen is also necessary for the decomposition of _______ into other elements necessary for life .

25. Plants release 430-470 billion tons of oxygen during the process of _______

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