Advertisements
Advertisements
Question
How is air useful to water boats?
Advertisements
Solution
Air helps the movement of water boats.
APPEARS IN
RELATED QUESTIONS
Match the statements in Column A, with those in Column B.
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (a) Oxygen |
| 2. A gas used for filling weather observeation balloons. | (b) Carbonic acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphuric acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
Name two air pollutants which affect our health.
Name two air pollutants which cause global warming.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
What will happen if the amount of water vapour in the air increases.
With whom should I pair up?
| Group A | Group B | ||
| (1) | Air | (a) | Excretion |
| (2) | Water | (b) | Scattering of light |
| (3) | Soil | (c) | Plasticity |
State whether the following statement is true or false.
The pressure exerted by air is called atmospheric pressure.
Which of the following statements is incorrect?
In a number of musical instruments, air plays an important role. Can you name some such instruments?
Explain the following observations very briefly
A firki does not rotate in a closed area.
