Pick the odd one out.
Birds
Fish
Animals
Insects
Which of the following are the uses of air ?
Generating electricity
Disposal of seeds
Flying of birds
All
We can find tiny droplets of water on the outer surface of a steel tumbler containing cold water or ice. This shows that
Steel contains air
Air contains water vapour
Cold water can seep through solids
None of these
From the below statements which denotes the presence of air
There is no movement of trees.
When we press bottles there is no air.
When we close bags air comes out.
Air is absent in inflated balloons.
Heat some water in a vessel. What do you see on the sides of the vessel?
Bubbles
Lines
Dust
When we heat water, we can find bubbles coming from it. This shows that
Water contains air
Air contains water
Hot water becomes bubbles
None
All the plants require nitrogen for
Reproduction
Photosynthesis
Transpiration
Growth
It is not proper to breathe through our mouth because
Dust particles would enter our bodies
More carbon dioxide will be inhaled
Our throat will become sore
We will catch cold easily
Lime water turns milky when exposed to air and stirred. This shows that air contains
Carbon dioxide
Hydrogen
Nitrogen
Oxygen
