Importance of Natural Resources

1.Why Are Plants Important?

Plants are important due to the following reasons—

• They provide us oxygen while performing photosynthesis.
• They help in maintaining the temperature of the environment.
• Plants help in bringing rain.
• They are a habitat for many animals and birds.
• Plants provide us with the food we eat.

2.Is Air a Mixture of Gases? How Is the Level of Oxygen Maintained in the Air?

Plants are important due to the following reasons—

• Yes, air is a mixture of different gases surrounding the Earth.
• While performing photosynthesis, plants use carbon dioxide in the air and release oxygen.
• It happens during the day in the presence of the Sun. At night, plants take in oxygen and release carbon dioxide.
• Hence, plants maintain the level of oxygen in the air by photosynthesis.

3.Is Air a Mixture of Gases? How Is the Level of Oxygen Maintained in the Air?

• Life on the Earth depends upon the light it receives from the Sun.
• Plants depend on sunlight to carry out photosynthesis.
• Sunlight maintains an optimum temperature on the Earth.
• In the absence of sunlight, there would be no vegetation, which would also severely affect the animal world.
• Sunlight is vital for the continuity of life on Earth.

4.How Is Soil Formed?

• The process of weathering forms soil that constitutes the topmost layer of the Earth..
• Weathering takes place through natural forces like water and wind.
• Also, small plants like lichen help in weathering by loosening up rocks.

5.What Gives Colours to the Soils of Different Places?

The characteristic colour of soil is because of the following reasons—

1. Age of the soil.
2. Presence of minerals; the red colour is due to iron, and the white colour is due to salts and silicates.
3. Amount of organic matter in soil.