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1. How do photosynthesis
and cellular respiration contribute
to the carbon cycle?

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1. How do photosynthesis
and cellular respiration contribute
to the carbon cycle?

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Photosynthesis

6CO2+12H2O → C6H12O6+6O2+6H2O

Respiration

6CO2+12H2O ← C6H12O6+6O2+6H2O

Photosynthesis can make C6H12O6, that is, sugar and people get energy from it through respiration. Respiration can make CO2 and it is used for photosynthesis.

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2. How global warming impacts animals and plants on Earth?

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2. How global warming impacts animals and plants on Earth?

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Global warming impacts them strongly. It causes abnormal weather. Animals and plants have to adapt unusual weather. If they can’t adapt, they have extinction crisis. It also cause a flood. If the countries sinked under the sea, all of animals and plant that lived those countries became extinct. (http://www.worldwildlife.org)

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3.  How do humans impact the carbon cycle? 

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3.  How do humans impact the carbon cycle? 

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Human impacted carbon cycle by using fossil fuels. Using fossil fuels means controlling carbon cycle. Human are using fossil fuels rapidly, then discharged huge amount of carbon dioxide.
(https://www.reference.com)

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4. The relationship between carbon and the greenhouse
effect.

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4. The relationship between carbon and the greenhouse
effect.

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The greenhouse effect is caused by carbon gas. CO2 have the greenhouse effect and this gas also cause global warming.

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1. Explain the relationship between Nitrogen and Eutrophication.  
						
					
				
			
		

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1. Explain the relationship between Nitrogen and Eutrophication.  
						
					
				
			
		

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Nitrogen can be nutrients for microbes so aquatic ecosystem will be eutrophication. If eutrophication progress, it is likely to occur a red tide and blue-green algae. Because of these, oxygen in the water decrease, and it sometimes happens that fishes and shellfishes die.
(https://kids.gakken.co.jp)

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2. How do humans impact the Nitrogen
Cycle?

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2. How do humans impact the Nitrogen
Cycle?

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Human activity makes nitrogen that easy to react through food production or energy production. Nitrogen is caused by using fertilizers, manures and detergents. (http://blog.goo.ne.jp)

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3. How eutrophication impacts animals and plants in aquatic
ecosystems?

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3. How eutrophication impacts animals and plants in aquatic
ecosystems?

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Eutrophication is a condition that nutrition of sea or river increases too much. Also, it breaks balance of nature and the amount of planktons that are living in the sea and river increase.

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4. Define nitrogen fixation and nitrification. Explain why these processes are necessary.

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4. Define nitrogen fixation and nitrification. Explain why these processes are necessary.

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Nitrogen fixation is to make nitrogen chemical compound using nitrogen in the air. In the natural world, it is done nitrogen fixation by root nodule bacteria. Nitrogen compound in the soil resolve and make ammonia. Ammonia and oxygen are combined, and become nitrogen acid. This is the nitrification. Living things can’t make nutrition that makes their body up without Nitrogen.
(http://www.weblio.jp, https://kids.gakken.co.jp)