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Question-1
Mountaineers carry oxygen cylinders with them because:
(A)
Oxygen supports combustion
(B)
Air becomes thinner as we go higher
(C)
Air is dense but lacks oxygen in mountains
(D)
They are unable to breathe in the air because of less gravity
Question-2
Smoke is an example of:
(A)
Liquid-in-gas mixture
(B)
Gas-in-solid mixture
(C)
Solid-in-gas mixture
(D)
Gas-in-liquid mixture
Question-3
In seas and oceans, a large number of plants, fishes and other animals live without air. How is this possible?
(A)
The plants and animals come to the surface in regular intervals.
(B)
Aquatic plants and animals do not need air to survive.
(C)
Water contains dissolved gases which enable them to live.
(D)
They survive because of the interdependence of plants and animals.
Question-4
Global warming is the result of the increase in:
(A)
Nitrogen in air
(B)
Oxygen in air
(C)
Water vapour in air
(D)
Carbon dioxide in air
Question-5
All the plants require nitrogen for:
(A)
Reproduction
(B)
Photosynthesis
(C)
Transpiration
(D)
Growth
Question-6
Which of the following gases cause the harmful green house effect?
(A)
Hydrogen
(B)
Oxygen
(C)
Carbon dioxide
(D)
Nitrogen
Question-7
Lime water turns milky when exposed to air and stirred. This shows that air contains:
(A)
Carbon dioxide
(B)
Hydrogen
(C)
Nitrogen
(D)
Oxygen
Question-8
Glass panes usually appear hazy because:
(A)
Of chemical reactions
(B)
Water vapour settling on the tiny dust particles
(C)
It is property of all transparent substances
(D)
They are old
Question-9
Which of the following plays a very important role in the oxygen cycle ?
(A)
Birds
(B)
Animals
(C)
Plants
(D)
Soil
Question-10
It is not proper to breathe through our mouth because:
(A)
The dust particles would enter our bodies
(B)
More carbon dioxide will be inhaled
(C)
Our throat will become sore
(D)
We will catch cold easily
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Cambridge Secondary Grade 6
IGCSE
Practice in Related Chapters
Sources of Food
Fibre to Fabrics
The Habitat of the Living
Body Movements in Animals
Things Around Us
Changes Around Us
Plants-Form and Function
Different Kind of Materials
Water
Components of Food
Fun with Magnets
Light, Shadow and Reflection
Separating Substances
Electric Current and Circuits
Waste Management
Air
Motion and Measurement of Distances
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