Worksheet Chapter 1 Geography

Class 7

Chapter 1 Geography

Environment

Worksheet

Q1. Fill in the blanks:-

1.      The domain of water is known as the _______. (Hydrosphere)

2.      The atmosphere is held to the earth by its ______ pull. (Gravitational pull)

3.      What we see in our surroundings is known as _______. (Environment)

4.      Plants and animal kingdoms together make the _____. (ecosystem)

Q2. Multiple Choice Questions:-

1.      The World Environment Day is celebrated on_____. (b)

a.      6 June   b. 5 June   c. 8 May    d. 5 July

2.      An important plant of the desert region is ____. (d)

a.      Pine   b. Mango Trees    c. Sundari Trees   d. Kikar

3.      Which is not a natural ecosystem?                              ( c)

a.      Desert    b. Forest   c. Aquarium   d. Mountains

4.      Which is not a component of human environment? (a)

a.      Land   b. Community   c. Religion   d. Bridge

5.      Which is a threat to environment? (c )

a.      Growing plant   b. Growing crops   c. Growing population   d. None of these

Q3. Match the Column ‘A’ with the Column ‘B’:-

                        A                                 B

            1. Biosphere                            blanket of air which surrounds the earth. (2)

            2. Atmosphere                        domain of water. (3)

            3. Hydrosphere                       gravitational force of the earth.

            4. Environment                       our surroundings. (4)

                                                            Narrow zone where land, water and air contact. (1)

                                                            Relation between the organisms and their surroundings.

Q4. Answer the following questions in brief (in 1 or 2 lines):-

1.      What is the difference between biotic and abiotic condition?

Ans:

	Abiotic	Biotic
1.	The world of non- living organism is called abiotic.	The world of living organism is called biotic.
2.	E.g. land, mountains.	E.g. plants, animals.

2.      What constitute the environment for a school student?

Ans: School’s learning Environment, playground, activity areas, class room decoration and availability of technology and other resources.

3.      What are the major components of the environment? Explain with example.

Ans: The major components of the environment are natural, human made and human. E.g.:-

Natural environment: It consists of all the objects created by nature (biosphere (living things), lithosphere (land), hydrosphere (water), atmosphere (air)).

Human made: Things that are made by human beings (buildings, park, bridges, roads, monuments, industries.)

Human: Consists of human beings (Individual, family, community, religion, educational, economic, political situation.)

4.      Mention four uses of water?

Ans: Water is the most essential for everyone. The four uses of water are as follow:

Water is used for drinking.

Water is needed to grow crops.

Water is essential for cooking.

Water is needed for cleaning.

5.      What are the different types of weather we experience?

Ans: We experience nearly following types of weather.

Hot weather

Cold weather

Humid weather

Rainy

Cloudy

Wet

Windy

Stormy

6.      What is an ecosystem?

Ans: All plants, animals and human beings depend on their immediate surroundings. Often they are interdependent on each other. The relationship between the living organisms, as well as the relationship between the organisms and their surroundings form an eco-system.

7.      Camels are common in desert area. Give reason.

Ans: Camels have cushioned feet which can help them walk on the sand very easily. Camel can also live without water and food for even a month. Moreover they can store water in their hump. So camels can live in desert easily. That is why they can easily be found in deserts.

Q5. Answer the following questions in detail (in 70 to 80 words):-

1.      What is an environment? How is the environment beneficial to us?

Ans: The place, people, things and nature that surround any living organism is called environment. It is a combination of natural and human made phenomena. The environment provides us with air, water and land.

2.      What is lithosphere? What is it made up of? Name the number of resources provided by it.

Ans: 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.

Lithosphere provides us forests, grasslands for grazing, minerals, and land for agriculture and human settlements.

3.      What is atmosphere? What is the composition of atmosphere? What is the importance of atmosphere?

Ans: The atmosphere is a thin layer of the air that surrounds the earth. Nitrogen, oxygen, carbon dioxide, dust and water vapours. Atmosphere protects us from the harmful rays and scorching heat of the sun. The changes in the atmosphere produce change in the weather and climate.

4.      What is biosphere? Explain it with a diagram.

Ans: Biosphere is the narrow zone where air, water and land interact with each other to support life.

5.      Why man modifies the environment?

Ans:  Man modifies his environment to fulfil his needs and to live a comfortable life. Humans learnt new ways to change environment and invented many things to satisfy his needs. The discovery of fire the invention of wheel, the development of trade and commerce, the invention of engine, the industrial revolution and the advancement of transportation and communication are some of the examples of human growth.