Nature & Scope of Environmental Studies : Chapter 1 : Important Questions & Answers

 Q. What is environmental science?

Answer: Study of inter-relationships between living and non-living things is called environmental science.

Q. Define Biosphere? Explain it's divisions.

Answer: Biosphere is defined as part of earth and atmosphere in which many smaller ecosystems exist and operate.

The main sub-divisions of biosphere are:

1- Lithosphere (solid matter)

2- Hydrosphere (Liquid Matter)

3- Atmosphere (Gaseous Matter)

Q. Define Atmosphere. Explain it's layers.

Answer: Atmosphere may be defined as transparent gaseous envelop surrounding the earth.

Layers of atmosphere are:

1.Troposphere: It extends from surface of earth upto a  height of 8 to 10 km. In this layer, the percentage concentration of different gases in air does not vary with an increase in height.

2. Stratosphere: This layer is above the troposphere and free from clouds and aeroplanes usually fly in lower zone.

3. Exosphere: It lies beyond 400km. The air density is very low in this layer and temperature increases at this layer.

Q. What is meant by Humidity?
Answer: 

Thee amount off water or moisture in air is called humidity.

Q. In what ways temperature affects plants and animals.

Answer: The temperature affects plants and animals:

1. It affects metabolism in plants and animals.

2. The reproduction in animals and flowering in plants is also affected.

3. It also influences the growth and development.