Question 1:
List the composition of air.
Answer:
Nitrogen 78%, oxygen 21%, carbon dioxide 0.03%, inert gases and others 0.97%
List the composition of air.
Answer:
Nitrogen 78%, oxygen 21%, carbon dioxide 0.03%, inert gases and others 0.97%
Question 2:
How can you identify oxygen and carbon dioxide?
Answer:
Glowing wooden splinter test for oxygen and lime water test for carbon dioxide.
How can you identify oxygen and carbon dioxide?
Answer:
Glowing wooden splinter test for oxygen and lime water test for carbon dioxide.
Question 3:
What is the importance of carbon dioxide to plants?
Answer:
Carbon dioxide is used by plants for photosynthesis.
What is the importance of carbon dioxide to plants?
Answer:
Carbon dioxide is used by plants for photosynthesis.
Question 4:
What are the effects of the increase of carbon dioxide in the air to humans?
Answer:
Greenhouse effect and global warming.
What are the effects of the increase of carbon dioxide in the air to humans?
Answer:
Greenhouse effect and global warming.
Question 5:
As a student who appreciates the importance of the carbon and oxygen cycles, suggest ways to ensure a balance of carbon dioxide and oxygen content in the air.
Answer:
(a) Reforestation
(b) Avoid using excessive pesticides
(c) Reduce the use of air-conditioners
As a student who appreciates the importance of the carbon and oxygen cycles, suggest ways to ensure a balance of carbon dioxide and oxygen content in the air.
Answer:
(a) Reforestation
(b) Avoid using excessive pesticides
(c) Reduce the use of air-conditioners