7 Class.Chapter1.Geography.Componants of Environments
Chapter 1.Geography
COMPONENTS OF ENVIRONMENT
Keywords
Biodiversity - It is a variety of of life on earth comprising of plants,animals and micro-organisms.
Microbes - A very small organisms.
National park - A well demarcated reserved area for the protection of wildlife. It does not allow any human activity.
Ocean- A vast expense of saline water on the earth’s surface.
Wildlife Sanctuary- A geographical area meant for the conservation of biodiversity.Limited human activities are permitted.
Internal questions
Q.1.What is environment.
A.1.Environment in its true sense can be difined as all that surrounds us. Environment is our basic life support system.
Q.2.Name the four spheres of the environment.
A. The four spheres of the environment are lithosphere , biosphere, hydrosphere and atmosphere.Lithosphere
Lithosphere means sphere of rocks.
Biosphere mean the sphere where life exists.
Hydrosphere is the sphere of water.
Atmosphere is the sphere of air.
Q.3.What are the Types of Lithosphere.
A.3.There are two types of Lithosphers.
a.Sial-The uppermost part of the lithosphere composed of rocks rich of silica and aluminium is called sial layer.
b.Sima -Below the sial layer the rocks are composed of silica and magnesium is called sima.
Question Answers.
A.Tick the correct option
1.Which one is not a part of biological environment;
Ans.Water.
2.Volcanoes erupt due to;
Ans. Internal disturbance of the earth.
3.Which one bring a sudden change in the environment;
Ans. Rainfall.
4.Identify by the term that stands for the topmost layer of the earth comprising of loose material;
Ans.Soil.
5.In which year was the wildlife protection act passed in India;
Ans. 1972.
B .Give a single term for each of the following sentences.
1. A situation or condition in which an organism lives.
Ans. Biosphere.
2.The only planet in our solar system where life exists.
Ans. Earth.
3.The uppermost part of the lithosphere which is rich in silica and aluminium.
Ans. Sial.
4.The sphere of air that envelopes the air.
Ans. Atmosphere.
5.Mass of water of the earth’s surface.
Ans. Hydrosphere.
C.Match the following.
1.Physical environment includes
Ans. Non living things.
2. It is the most dynamic in nature.
Ans. Atmosphere.
3. A narrow zone supporting life.
Ans. Biosphere.
4. They are capable of modifying environment.
Ans. Human beings.
5.Rocks rich in silica and magnesium.
Ans. Sima.
Keywords
Biodiversity - It is a variety of of life on earth comprising of plants,animals and micro-organisms.
Microbes - A very small organisms.
National park - A well demarcated reserved area for the protection of wildlife. It does not allow any human activity.
Ocean- A vast expense of saline water on the earth’s surface.
Wildlife Sanctuary- A geographical area meant for the conservation of biodiversity.Limited human activities are permitted.
Internal questions
Q.1.What is environment.
A.1.Environment in its true sense can be difined as all that surrounds us. Environment is our basic life support system.
Q.2.Name the four spheres of the environment.
A. The four spheres of the environment are lithosphere , biosphere, hydrosphere and atmosphere.Lithosphere
Lithosphere means sphere of rocks.
Biosphere mean the sphere where life exists.
Hydrosphere is the sphere of water.
Atmosphere is the sphere of air.
Q.3.What are the Types of Lithosphere.
A.3.There are two types of Lithosphers.
a.Sial-The uppermost part of the lithosphere composed of rocks rich of silica and aluminium is called sial layer.
b.Sima -Below the sial layer the rocks are composed of silica and magnesium is called sima.
Question Answers.
A.Tick the correct option
1.Which one is not a part of biological environment;
Ans.Water.
2.Volcanoes erupt due to;
Ans. Internal disturbance of the earth.
3.Which one bring a sudden change in the environment;
Ans. Rainfall.
4.Identify by the term that stands for the topmost layer of the earth comprising of loose material;
Ans.Soil.
5.In which year was the wildlife protection act passed in India;
Ans. 1972.
B .Give a single term for each of the following sentences.
1. A situation or condition in which an organism lives.
Ans. Biosphere.
2.The only planet in our solar system where life exists.
Ans. Earth.
3.The uppermost part of the lithosphere which is rich in silica and aluminium.
Ans. Sial.
4.The sphere of air that envelopes the air.
Ans. Atmosphere.
5.Mass of water of the earth’s surface.
Ans. Hydrosphere.
C.Match the following.
1.Physical environment includes
Ans. Non living things.
2. It is the most dynamic in nature.
Ans. Atmosphere.
3. A narrow zone supporting life.
Ans. Biosphere.
4. They are capable of modifying environment.
Ans. Human beings.
5.Rocks rich in silica and magnesium.
Ans. Sima.
D.Answer the following in the brief.
Q.1.Name the major components of the environment.
Ans.The major components of the environment are
1.Biological environment.ex -water,air,and living things.
2.Physical environment. ex - buildings,park,road,and industries etc.
Q.2.What is meant by sima and sial?
Ans. Sial,the uppermost part of the lithosphere is known as sial.
Q.3.Mention the distribuition of water in the Northern and Southern hemisphers.
Ans.43 Percent of water lies in the northern hemisphere and 57 per cent of water covered in southern hemisphere.
Q.4. Give the latrial meaning of the four spheres of the environment.
Ans.Lithosphere means sphere of land ; Hydrosphere means sphere of water ; Biosphere means sphere of life ; Atmosphere means sphere of air.
Q.5. What is atmosphere composed of .
Ans. Atmosphere is composed of a mixture of gases.
E.Answer the following questions
Q.1. Differentiate between physical and biological environment.
Ans.Physical environment; Physical environment includes non living things like land water and air.
Biological environment ; Biological environment includes all living things like human beings and animals.
Q.2.Why is earth called ‘ the blue planet ’
Ans. Earth is known as blue planet because of abundance water . 70 per cent of water of the earth is covered by water.
Q.3.Define biosphere. Why is it important for us.
Ans. Biosphere means sphere of life and it is a narrow zone in which where life exists.
Without biosphere , no one can live in the earth.
Q.4.Explain with the help of an example how physical and biological components of the environment are interdependent.
Ans. Physical and biological environment are interdependent as without physical environment the biological environment could not live and without biological environment physical environment cannot live.
Q.5.Explain two ways in which human being are disturbing the natural environment.
Ans.The two ways in which human being are disturbing the natural environment are;1.Deforestation.2.Global warming.
Q.1.Name the major components of the environment.
Ans.The major components of the environment are
1.Biological environment.ex -water,air,and living things.
2.Physical environment. ex - buildings,park,road,and industries etc.
Q.2.What is meant by sima and sial?
Ans. Sial,the uppermost part of the lithosphere is known as sial.
Q.3.Mention the distribuition of water in the Northern and Southern hemisphers.
Ans.43 Percent of water lies in the northern hemisphere and 57 per cent of water covered in southern hemisphere.
Q.4. Give the latrial meaning of the four spheres of the environment.
Ans.Lithosphere means sphere of land ; Hydrosphere means sphere of water ; Biosphere means sphere of life ; Atmosphere means sphere of air.
Q.5. What is atmosphere composed of .
Ans. Atmosphere is composed of a mixture of gases.
E.Answer the following questions
Q.1. Differentiate between physical and biological environment.
Ans.Physical environment; Physical environment includes non living things like land water and air.
Biological environment ; Biological environment includes all living things like human beings and animals.
Q.2.Why is earth called ‘ the blue planet ’
Ans. Earth is known as blue planet because of abundance water . 70 per cent of water of the earth is covered by water.
Q.3.Define biosphere. Why is it important for us.
Ans. Biosphere means sphere of life and it is a narrow zone in which where life exists.
Without biosphere , no one can live in the earth.
Q.4.Explain with the help of an example how physical and biological components of the environment are interdependent.
Ans. Physical and biological environment are interdependent as without physical environment the biological environment could not live and without biological environment physical environment cannot live.
Q.5.Explain two ways in which human being are disturbing the natural environment.
Ans.The two ways in which human being are disturbing the natural environment are;1.Deforestation.2.Global warming.
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