WorksheetsAir Around Us
Total questions: 20
Worksheet time: 8mins
Which of the following processes need Oxygen?
Combustion
Respiration
Rusting of Iron
All of these
When water is heated, bubbles are formed. Why?
Water contains dissolved minerals
Water contains dust
Water contains air
None of these
Why do mountaineers carry oxygen cylinders?
Less oxygen in high altitudes
More oxygen in high altitudes
Less oxygen in low altitudes
More oxygen in low altitudes
Which of the following will cause harmful greenhouse effects?
Nitrogen
Oxygen
Hydrogen
Carbondioxide
What is the percentage of nitrogen in the air?
78%
21%
1%
0.035
Percentage of water vapors present in the air is called
Solubility
Density
Humidity
Temperature
Breathing air through mouth is not hygienic because?
Our throat will become sore
Dust particles will enter our lungs
We will inhale more carbondioxide
We will easily catch cold
What enables us to drink from a straw?
Humidity
Temperature
Atmospheric pressure
Composition of air
Lime water turns milky when exposed to air. This shows the presence of?
Carbondioxide
Oxygen
Nitrogen
Hydrogen
Which layer of the atmosphere do we live in?
Ionosphere
Mesosphere
Stratosphere
Troposphere
What kind of gas is neon?
Trace Gas
Noble Gas
Combustible Gas
None of these
Airplanes fly in the?
Thermosphere
Mesosphere
Stratosphere
Troposphere
Which of the following in not present in the atmosphere?
Helium
Iron
Carbonate
Ozone
Which gas is required for burning?
Nitrogen
Carbon dioxide
Oxygen
None of these
Which layer of the atmosphere contains the Ozone layer?
Exosphere
Thermosphere
Mesosphere
Stratosphere
Water vapour in the air is super -important in which of the following?
Oxygen cycle
Water cycle
Earth cycle
Gravity of the Sun
Which of the following is INCORRECT?
Carbon dioxide is non-combustible
Nitrogen is non-combustible
Hydrogen is non-combustible
All of these
Air is present?
Near water
Near land
In open areas
Everywhere
Which of the following is true about air?
Air is heterogenous
Air is homogenous
Air is a compound
Air is an alloy
Plants absorb nitrogen from the soil in the form of?
Nitrogen dioxide
Nitrate
Nitric acid
Nitrite
