Question

D. Short answer type questions :
1. Why do we study environment ?
2. Name the four domains of the Earth.
3. How is atmosphere useful for us?
4. What is lithosphere?
5. What is hydrosphere?
6. Define biosphere.
7. Why should we protect our environment?
8. What is ecology?
9. What is physical environment also called ?
10. What do you mean by ecosystem?
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Answer 1

Answer:

1. Our environment is very important to us because it is where we live and share resources with other species. ... Environmental science enlightens us on how to conserve our environment in the face of increasing human population growth and anthropogenic activities that degrade natural resources and ecosystems.

2. Four domains of Earth - Atmosphere, Lithosphere, Hydrosphere and Biosphere.

3. The atmosphere helps to protect living organisms from genetic damage by solar ultraviolet radiation, solar wind and cosmic rays. The current composition of the Earth's atmosphere is the product of billions of years of biochemical modification of the paleoatmosphere by living organisms.

4. A lithosphere is the rigid, outermost shell of a terrestrial-type planet, or natural satellite, that is defined by its rigid mechanical properties. On Earth, it is composed of the crust and the portion of the upper mantle that behaves elastically on time scales of thousands of years or greater.

5. all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.

6. the part of the earth’s surface and atmosphere in which plants and animals can live.

7. Healthy ecosystems clean our water, purify our air, maintain our soil, regulate the climate, recycle nutrients and provide us with food. They provide raw materials and resources for medicines and other purposes. They are at the foundation of all civilisation and sustain our economies.

8. Ecology is a branch of biology concerning interactions among organisms and their biophysical environment, which includes both biotic and abiotic components.

9. Physical environment is also called aboitic environment.

10. The simplest definition of an ecosystem is that it is a community or group of living organisms that live in and interact with each other in a specific environment.

Answer 2

Answer:

1. Environmental science enlightens us on how to conserve our environment in the face of increasing human population growth and anthropogenic activities that degrade natural resources and ecosystems.
2. Atmosphere,Lithosphere, Hydrosphere and Biosphere
3. The Earth's atmosphere protects and sustains the planet's inhabitants by providing warmth and absorbing harmful solar rays
4. The lithosphere is the solid shell of the planet Earth.That means the crust, plus the part of the upper mantle that behaves elastically on long time scales
5. A hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air. A planet's hydrosphere can be liquid, vapor, or ice.
6. the part of the earth’s surface and atmosphere in which plants and animals can live
7. the environmental pollution is one of the main reasons why we should fight to protect environment. Besides, global warming is also another reason caused by the deforestation. 
8. Ecology enriches our world and is crucial for human wellbeing and prosperity.
9. aboitic environment
10. The interaction between the biotic and abiotic components present in a particular area is called an ecosystem