Chemistry Lesson 17 Key Question #17 Why are oxygen and nitrogen important gases

Question

Chemistry Lesson 17 Key Question #17 Why are oxygen and nitrogen important gases in our atmosphere? (2 marks) Why is it important to decrease the level of greenhouse gases in the Earth's atmosphere? (3 marks) 3. a. What is the Kyoto Protocol? (2 marks) b. Canada has set up various initiatives in an attempt to meet the requirements of the Kyoto Protocol. Discuss in a 1 to 2-page report (single spaced, size 12 font) the effectiveness of such initiatives. You may choose to focus on one particular initiative, or several of them. Be sure to provide valid supporting points. (8 marks) Write a 1 to 2-page response (single spaced, size 12 font) to the question: Which kind of diaper creates more air pollution: disposable or cloth? Be sure to choose one opinion and support your opinion with evidence (from the 4. Environment Canada article and/or other references). (10 marks)

Explanation / Answer

Ans 1 :

Oxygen and nitrogen are the gases that are present in the atmosphere in maximum amount. Nitrogen is 78 % by volume and oxygen is 21% by volume and rest all other trace gases make 1 % of the atmosphere.

Both of these gases play a an important role in our lives. Nitrogen is required for the growth and reproduction as it is an important constituent of amino acids and proteins.

Oxygen is the most important gas for our survival. We breathe in oxygen and hence cannot imagine life without it. It is required for the release of energy from the fuel that we ingest in the form of food.

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