Chapter 14-Natural Resources

The ________ have an important role in preventing soil erosion.

roots of plants

Vegetative cover

________ on the ground has a role to play in the percolation of water into the deeper layers too.

________ are used to a certain range of temperature in the water- body where they live, and a sudden marked change in this temperature would be dangerous for them or affect their breeding.

Aquatic organisms

normal diatomic molecule

Unlike the ________ of oxygen, ozone is poisonous and we are lucky that it is not stable nearer to the Earths surface.

________ generally take up nitrates and nitrites and convert them into amino acids which are used to make proteins.

Plants

All ________ take place in a water medium.

cellular processes

________ is found in various forms on the Earth.

Carbon

The ________ and exoskeletons of various animals are also formed from carbonate salts.

endoskeletons

The ________ is the region of the Earth that supports life and is where the interactions between the hydrosphere, lithosphere, and atmosphere occur.

biosphere

During lightning, the ________ and pressures created in the air convert nitrogen into oxides of nitrogen.

high temperatures

In large parts of India, rains are mostly brought by the ________ .

southwest or north- east monsoon winds

The air, the water and the soil form the non- living or ________ of the biosphere.

abiotic component

fossil fuels

The ________ like coal and petroleum contain small amounts of nitrogen and sulphur.

________ are decided by the prevailing wind patterns.

Rainfall patterns

Living things constitute the ________ of the biosphere.

biotic component

________ makes up 78 % of our atmosphere and nitrogen is also a part of many molecules essential to life like proteins, nucleic acids (DNA and RNA) and some vitamins.

Nitrogen gas

________ is one of the greenhouse gases.

Carbon dioxide

In the presence of sunlight, green plants convert ________ into glucose.

carbon dioxide