CBSE Class 5 Science Air Around Us Worksheet

Q.1 Fill in the blanks

(a) The air we breathe out is called ………………………..

(b)The thick blanket of air is held around the earth by the earth’s…………………………………

(c)…………………… gas is used in making light bulbs.

(d)The higher we go, the …………………… is the air pressure.

(e)This is the second layer where the jet planes fly ………………………

(f)…………………….. is the instrument used to measure atmospheric pressure.

Q.2 Give reasons:

(a) A candle goes off after sometime when it is covered by a jar or a tumbler.

…………………………………………………………………………………………………………

(b) Astronauts need to carry oxygen cylinders when they go to space.

1. Fill in the blanks.

1. The second biggest content of air is .....................

2. As we go up to higher altitudes ..................... becomes thinner.

3. All weather changes takes place in ..................... layer of atmosphere.

4. The air we breathe in is called ..................... air.

5.Clouds are rare in ..................... layer of atmosphere.

6. ..................... is a mixture of gases.

7.The air we breathe out is called ..................... air.

8. Exhaled air has a higher percentage of ..................... than the inhaled air.

9.Plants carry out a process called addition to ..................... in respiration.

II. Name the following.

1. An envelope of air around the earth. ................

2. The layer of atmosphere above Troposphere. ................

3. The lowest layer of atmosphere ................

4. The layer that reflects radio waves back to the earth. ................

5. The layer which is a part of Stratosphere. ................

III Choose the correct answer.

1.As we go to higher altitudes air becomes [more/less]

2.The percentage of oxygen gas in air is [78%/21%].

3.Inspired air is rich in [oxygen/nitrogen].

4. Blood in the [lungs/heart] take oxygen from the air we breathe in.

5.All living things take in [oxygen/carbondioxide] during respiration.

I. Fill in the blanks :

1. As we go up to higher altitudes _________________ becomes thinner.

2. All weather changes takes place in _________________ layer of atmosphere.

3. Clouds are rare in _________________ layer of atmosphere.

4. The air we breathe in is called _________________ air.

5. The air we breathe out is called _________________ air.

6. _________________ is a mixture of gases.

II. Name the following :

1. An envelope of air around the earth _____________________

2. The lowest layer of atmosphere _____________________

3. The layer of atmosphere above Troposphere _____________________

4. The layer that reflects radio waves back to the earth ___________________

5. The layer which is a part of Stratosphere ___________________

III. Choose the correct answer :

1. As we go to higher altitudes air becomes (more / less)

2. Exhaled air contains more amount of (Oxygen / Carbondioxide)

3. The percentage of Oxygen gas in air is (21% / 78%)

4. Inspired air is rich in (Oxygen / Nitrogen)

5. Blood in the (lungs / heart) take Oxygen from the air we breathe in.