WorksheetsChap 16.1 - Class Test - Air
Total questions: 15
Worksheet time: 8mins
__________ is the second most plentiful gas in the air
Oxygen
Carbon dioxide
Green plants produce oxygen during __________
Carbon dioxide
Photosynthesis
Green house
TRUE OR FALSE When air is heated it expands
True
False
Our earth is surrounded by a huge blanket is called
(a)
Does an animal need air?
yes
no
Do plants need air?
yes
no
Does a sailboat use air?
yes
no
Which gas creates green house effect in the atmosphere?
Carbon dioxide
Ozone
Oxygen
None of these
As we go up to the layers of atmosphere, the pressure
Increases
Decreases
Remains the same
Which gases makes the bulk of atmosphere?
Nitrogen
Oxygen
Both A & B
None of these
Which of the following gases protect us from the UV rays?
Carbon-dioxide
Nitrogen
Ozone
Which property of Air shown in the image?
Air exerts pressure
Air is needed for burning
Air has weight
Air has mass
The amount of (a) present in the air at a particular time is called humidity.
