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WorksheetsAir (Chapter 7)
Total questions: 10
Worksheet time: 5mins
What is the percentage of oxygen in our air?
21%
78%
0.03%
0.97%
Which of the following involves using nitrogren?
ammonia
light bulb
fertilizer
fire extinguisher
What type of gas is needed to make a light bulb?
carbon dioxide
helium
neon
argon
Which processes causes the release of carbon dioxide?
burning of fossil fuels
decomposition
respiration
all of the above
What is meant by the oxygen cycle?
A continuous cycle that takes carbon dioxide from the air and returns oxygen from it.
A continuous cycle that takes oxygen from the air and returns carbon dioxide from it.
A continuous cycle that takes oxygen from the air and returns it to the air.
A continuous cycle that takes carbon dioxide from the air and returns it to the air.
How can we reduce the problem of interference of the oxygen and carbon cycle?
Avoid using excessive pesticides
Prohibit illegal logging
Do not burn forests
Deforestation
What is combustion?
substance is heated in the presence of oxygen which produces heat energy or light energy.
substance is heated in the presence of oxygen which produces heat energy and light energy.
substance is heated in the presence of oxygen which produces heat energy.
substance is heated in the presence of oxygen which produces light energy.
What is meant by air pollution?
The presence of soot in the air.
The presence of smoke in the air.
The presence of dust in the air .
The presence of any pollutants in the air.
Which of the following releases the pollutant Chlorofluorocarbon (CFC) into the air?
Air-conditioners
Nuclear powerplants
Construction sites
Electronic factories
What are the effects of air pollution?
sand storms
acid rain
thinning of ozone layer
