Aquarium is not a natural ecosystem. True
Land is a component of human environment. False
Road is a human made environment. True
Q2. What is atmosphere?
The atmosphere is the thin layer of air that surrounds the earth.
Q3. Write the significance of atmosphere.
It protects us from the harmful rays and scorching heat of the sun.
Q4. What do you mean by barter system?
is a trade in which goods are exchanged without the use of money.
Q5. What is hydrosphere?
The domain of water is referred to as hydrosphere.
Q6. What hydrosphere comprises of?
It comprises various sources of water and different types of water bodies like
rivers, lakes, seas, oceans, etc.
Q7. Which are the two major components of biotic environment?
Plants and animals are the two major components of biotic environment.
Q8. Name the basic component of natural environment?
Air, water, land and living beings are the basic component of natural
Q9. Why is hydrosphere important?
The hydrosphere is important because it comprises water, which sustains a
variety of life forms.
Q10. Give four examples of human made environment.
Examples of human made environment are parks, buildings, bridges, roads, industries,
Q11. How is environment important to us?
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.
Q12. What do you mean by natural environment?
Natural environment comprises of land, water, air, plants and animals. Thus,
environment refers to both biotic and abiotic conditions existing on the earth.
Q13. Why is lithosphere important?
Lithosphere is important because it provides us forests, grasslands for
grazing, land for agriculture and human settlements. It is also a source of
Q14. 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
Q15. 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.
Q16. What is biosphere?
Biosphere is a narrow zone of the earth where land, water and air interact with
each other to support life. Thus, plant and animal kingdom
together make biosphere or the living world.
Q17. 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.
Q18. Plants and animals depend on each other. Give reason.
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.
Q19. 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.
Q20. Why man modifies his environment?
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.
Q21. Differentiate between biotic and abiotic environment.
Ans. Difference between biotic and abiotic environment
The world of living organisms.
The world of non-living elements.
Example: plants and animals
Q22. Which are the major components of the environment?
The major components of the environment include:
environment – It comprises of land, water, air, plants
environment – It includes individual, family,
community, religion, educational, economic and political situation.
made environment – It includes parks, buildings, bridges,
roads, industries, monuments etc.