Environment Class 7 Worksheet Geography Chapter 1

Q.1. What is atmosphere?

The atmosphere is the thin layer of air that surrounds the earth.

Q.2. What do you mean by barter system?

It is a trade in which goods are exchanged without the use of money.

Q.3. How is environment important to us?

Environment is important to us because it provides the air we breathe, the water we drink, the food we eat and the land where we live.

Q.4. What is environment?

The place, people, things and nature that surround any living organism is called environment. It is a combination of natural and human made phenomena.

Q.5. What is an ecosystem?

It is a system formed by the interaction of all living organisms with each other and with the physical and chemical factors of the environment in which they live, all linked by transfer of energy and material.

Q.6. What is lithosphere?

Lithosphere is the solid crust or the hard top layer of the earth. It is made up of rocks and minerals and covered by a thin layer of soil. It is an irregular surface with various landforms such as mountains, plateaus, plains, valleys, etc.

Q.7. Which are the major components of the environment?

The major components of the environment include:

• Natural environment – It comprises of land, water, air, plants and animals.
• Human environment – It includes individual, family, community, religion, educational, economic and political situation.
• Human made environment – It includes parks, buildings, bridges, roads, industries, monuments etc.

Q.8. What is hydrosphere?

The domain of water is referred to as hydrosphere.

Q.9. Name the basic component of natural environment?

Air, water, land and living beings are the basic component of natural environment.

Q.10. What do you mean by natural environment?

Natural environment comprises of land, water, air, plants and animals. Thus, natural environment refers to both biotic and abiotic conditions existing on the earth.

Q.11. Why is our environment changing?

Our environment is changing because our needs are increasing day by day and in order to fulfill these needs we are modifying and at times even destroying our natural surroundings.

Q.12. Plants and animals depend on each other. Give reason.

Plants provide shelter for animals and they provide oxygen for the animals to live. When animals die they decompose and become natural fertilizer for plants. Animals also help in pollination and seed dispersal.

Q.13. Why man modifies his environment?

Man modifies his environment according to their need. With time needs grew and became more varied. Humans learn new ways to use and change environment. They learn to grow crops, domesticate animals and lead a settled life.

Q.14. What hydrosphere comprises of?

It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc.

Q.15. Give four examples of human made environment.

Examples of human made environment are parks, buildings, bridges, roads, industries, monuments etc.