Question

Solve the following crossword.

Across

1. The gas is used to store organs:

2. Its oxide is responsible for global warming:

5. Oxides of sulphur and nitrogen are responsible for:

6. The blanket that surrounds the earth:

8. The gas essential to survive:

9. The tiny holes in housefly to breathe in and out:

10. One of the main causes of air pollution in urban residential areas:

Down

3. Plantation of more and more trees:

4. Plant take nitrogen in the form of a molecule:

7. Breakdown of food or glucose inside the human beings:

Accepted Answer

Across

1. The gas used to store organs is nitrogen which is called liquid nitrogen. When the body tissues and cells are put in the liquid nitrogen, then due to its freezing temperature, the metabolism gets stopped without destroying it.

2. The oxide of carbon that is carbon dioxide traps the heat coming from the sun and increases the temperature of the atmosphere day-by-day. The increase in the temperature of the atmosphere causes global warming.

5. Oxides of sulphur and nitrogen mix with rain water and make it acidic. It results in acid rain.

6. The blanket that surrounds the earth is called atmosphere. The atmosphere maintains the temperature of the earth.

8. Oxygen is the second most abundant gas in the air, which is essential for survival of living organisms.

9. During respiration, animals take in oxygen and release carbon dioxide. All the animals take in oxygen through different organs. Housefly breathes in and out through tiny holes called spiracles.

10. One of the main causes of air pollution in urban residential areas is deforestation. Deforestation is the permanent removal of trees to make room for something besides forest.

Down

3. Air pollution causes acid rain, global warming, respiratory diseases. Air pollution can be prevented by following methods such as afforestation, save tree, use public transport, etc. Afforestation is the process of planting a large number of trees.

4. Nitrogen is necessary for the proper growth of the plants. Plants cannot take nitrogen directly from the air. The nitrogen fixing bacteria present in the soil convert atmospheric nitrogen into nitrogen compounds such as nitrate and nitrites. These nitrogen compounds are used by the plants for their proper growth.

7. Respiration is the biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water.

Archana Shukla Solutions for Chapter: Air and Its Importance, Exercise 5: WORKSHEET

Archana Shukla Science Solutions for Exercise - Archana Shukla Solutions for Chapter: Air and Its Importance, Exercise 5: WORKSHEET

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