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प्रश्न
Define the following:
Respiration
उत्तर
Respiration: Respiration is a chemical process that takes place in all living beings (slow in plants). In this process, oxygen present in inhaled air reacts with the digested food material in the body. This results in the release of energy, carbon dioxide, and water.
Sugar + Oxygen → CO2 + Water + Energy.
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संबंधित प्रश्न
How is air useful to agriculture?
Mention five causes of air pollution.
State four steps to be taken to control air pollution.
Describe a simple experiment with the help of a diagram to show that Air is highly compressible
Name the following.
Gases that are harmful to the ozone layer
How is light scattered by the air?
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. The constituent of air which is around 0.02% | A: Nitrogen |
| 2. The constituent of air which is inert or unreactive | B: Oxygen |
| 3. The constituent of air which is non-combustible, but supports combustion. |
C: Sulphur dioxide |
| 4. A pollutant in air responsible for acid rain | D: Carbon dioxide |
| 5. The main rare gas present in air. | E: Argon |
Take a squeezable bottle. Make a hole on the lid and close the bottle tightly. Bring the bottle near your face and press the bottle. What do you feel?
In the boxes of Column, I the letters of some words got jumbled. Arrange them in proper form in the boxes given in Column II
| Column I | Column II | ||
| (a) | DILLMWIN | (a) | |
| (b) | YNOGXE | (b) | |
| (c) | MESKO | (c) | |
| (d) | TUDS | (d) | |
Match the items of Column I with the items of Column II
| Column-I | Column-ll | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of airflow |
| (e) | Wind | (v) | Prevent dust particles |
