Atmosphere Worksheet for Grade 7 with Solved
Atmosphere Worksheet for Grade 7: Atmosphere Worksheet for Grade 7 students with solution in this page. Students of Standard 7 who are already cleared concept on Atmosphere can solve this paper.
Layers of atmosphere
Q1) What is atmosphere?
Ans. Thin layers of gas that surrounds the earth is called atmosphere.
Q2) What is the distance of atmosphere from earth?
Ans. 700 km from the earth surface.
Q3) What is atmospheric pressure?
Ans. The weight of the gas makes a pressure on the earth as well as all things around us is called atmospheric pressure.
Q4) How atmospheric pressure is measured?
Ans. Atmospheric pressure measured in millibars.
Q5) What is altitude?
Ans. A height of a certain place from the sea level is called altitude.
Q6) Mention five layers of atmosphere?
Ans. The layers of atmosphere are
Troposphere
Stratosphere
Thermosphere
Mesosphere
Exosphere
Q7) What is the function of atmosphere?
Ans. Atmosphere provides oxygen which is required for breathing. It also provide carbon dioxide which is used by the plants in the process of photosynthesis.
Q8) When does temperature decreases?
Ans. Temperature decreases with the increasing in height
Q9) What is the use of oxygen?
Ans. Oxygen is useful for respiration and combustion.
Q10) What is the use of argon?
Ans. To fill filament of bulbs
To produce electric lamps
Troposphere
Q1) What is height of troposphere near the poles?
Ans. 8 km.
Q2) What is height of troposphere near the equator
Ans. 15 km.
Q3) How much percent of atmosphere covered with troposphere?
Ans. 71%
Q4) What are the particles we found in troposphere
Ans. Water vapour and dust particles.
Stratosphere
Q1) What is the height of stratosphere about mean sea level?
Ans. 15- 50 km
Q2) Why jet fly over this air?
Ans. In stratosphere there is very litte water vapour is present,
Q3) What does this level protects the earth?
Ans. It protects from the ultra violet rays.
Mesosphere
Q1) What is the extends of this layer?
Ans. 50- 80 km
Q2) What is the temperature of this layer?
Ans. mesosphere is the coolest layer than all layers because water vapour get frozen into ice clouds.
Thermosphere
Q1) What is the extend of thermosphere?
Ans. 80 to 120 km
Q2) What is the temperature of thermosphere?
Ans. The temperature is high in this layer because the air particles absorb sun light.
Exosphere
Q1) What is last layer of atmosphere?
Ans. 120 km above sea level
Q2) What is high of sea level?
Ans. 120 km above sea level
Air pollution
Q1) How air pollution is caused?
Ans. when harmful substances mixed in the atmosphere.
Q2) Write four effects of air pollution?
Ans. 1.) Climate changes on the earth
2.) Acid rain
3.) Increase in temperature
4.) Causing health problems
Q3) Write four prevent I’ve measures of air pollution?
Ans. 1) Re cycling waste without burning
2) Protect forest
3) Re forestation
4) Use eco friendly energy resource