EASY
Earn 100

What is air made up of?

Important Questions on Our Basic Needs

MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
Which of the following is not a pollutant?
EASY
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
Name the component of air which condenses on a cold surface to form drops of a liquid. What is this liquid?
HARD
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
What would happen if we had to breathe in only pure oxygen? Would we die?
EASY
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
List any two uses of air.
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
  What is greenhouse effect?
HARD
Environmental Studies>My Special World>Our Basic Needs>Air Around Us

Describe a simple experiment to prove that air contains water vapor.

MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
Why do living beings need air?
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
What all does air contain?    
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
State the Importance of carbon dioxide for living things?
HARD
Environmental Studies>My Special World>Our Basic Needs>Air Around Us

Match the statements in column A with those in column B.

Column A Column B
1. A gas present in air and useful in making fertilizers. (a) Oxygen
2. A substance in the presence of which photosynthesis takes place. (b) Atmosphere
3. A gas which helps in burning of fuels. (c) Nitrogen
4. A gas which is useful for plants in making food. (d) Chlorophyll
5. A gaseous cover surrounding the earth. (e) Carbon dioxide

 

EASY
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
What percentage of air is nitrogen gas?
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
How do plants get nitrogen from the atmosphere?
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
From where does dust enter into the air? What will happen if we breathe through our mouth? Explain.
EASY
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
Which gas do plants release during photosynthesis?
EASY
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
Name any one component of air which does not support burning.
EASY
Environmental Studies>My Special World>Our Basic Needs>Air Around Us

The statement given below is incorrect. Write correct statement.

Air contains approximately 1% of oxygen by volume.

MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
Give uses of individual components of air.
EASY
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
What does air contain? 
EASY
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
The air that we breathe in is rich in carbon dioxide.
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Air Around Us
Why do plants need nitrogen?