Class 7th geography environment-lesson 1

IT COMPLETE EXPLAINATION OF THE LESSON, WITH PICTORIAL EXERCISES AND EXTRA QUESTIONS AND ANSWERS. THISH IS AVAILABLE ON YOUTUBE ALSO https://youtu.be/VOMJdlEUPD0

1. CLASS -7 TH GEOGRAPHY LESSON -1 WITH PICTORIAL ACTIVITIES and answers https://youtu.be/VOMJdlEUPD0

2. The term environment has been derived from a French word “Environia” means to surround. According to E. J. Ross “Environment is an external force which influences us.” https://youtu.be/VOMJdlEUPD0 you may kindly watch it on YouTube also

3. For examples , table, chair, school, car, animals, parks, newspaper, mountains, rivers, trees, clothes, books and so on. Environment means the surroundings or conditions in which person, animal, or plant lives. A LL THE THINGS SURROUNDING US IS KNOWN AS ENVIRONMENT

4. ENVIRONMENT BIOTIC- THAT IS LIVING COMPONENTS example- animal, human beings ABIOTIC – THAT IS NON-LIVING COMPONENTS example - soil , minerals , car Natural Environment can be divided into following components

5. COMPONENTS OF ENVIRONMENT

6. COMPONENTS OF INVIRONMENT It has three components:- [1] NATURAL ENVIRONMENT:- Land, water, air, plants and animals comprise the natural environment. we are familiar with the meaning of lithosphere, hydrosphere, atmosphere and biosphere . DID YOU KNOW? The World Environment Day is celebrated on 5th of June, every year.

7. Lithosphere [1] 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. [2] It is an irregular surface with various landforms such as mountains, plateaus, plains, valleys, etc. Landforms are found over the continents and also on the ocean floors. [3] Lithosphere is the domain that provides us forests, grasslands for grazing, land for agriculture and human settlements. It is also a source of mineral wealth.

8. HYDROSPHERE - The domain of water is referred to as hydrosphere. It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc. It is essential for all living organisms.

9. The atmosphere - is the thin layer of air that surrounds the earth. The gravitational force of the earth holds the atmosphere around it. It protects us, from the harmful rays and scorching heat of the sun. It consists of a number of gases, dust and water vapor. The changes in the atmosphere produce changes in the weather and climate .

10. TRU ST ME IN THE EX AM

11. BIOSPHERE- Plant and animal kingdom together make biosphere or the living world. It is a narrow zone of the earth where land, water and air interact with each other to

12. In other words, an ecosystem is a chain of interaction between organisms and their environment. The term “Ecosystem” was first coined by A.G.Tansley , an English botanist, in 1935 All plants, animals and human beings depend on their immediate surroundings. Often they are also interdependent on each other. This relation between the living organisms, as well as the relation between the organisms and their surroundings form an ecosystem.

13. HUMAN ENVIRONMENT Human beings interact with the environment and modify it according to their need. Early humans adapted themselves to the natural surroundings. With time needs grew THEY learn new ways to use . They learn to grow crops, lead a settled life. surplus food was produced, barter system emerged. Industrial revolution enabled large scale production. Transportation , Information communication easier and speedy across the world . Barter System: It is a trade in which goods are exchanged without the use of money.

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15. [1] CAN YOU NAME THIS IMAGE…………… ? ANSWER- - - - - - - -

16. [2] Name the layers of the atmosphere, serially in the ascending order?

17. [3] CAN You name these dustbins to save the environment? First one is done.

18. No.4

19. [ No. 5] -IDENTIFY THE ECOSYSTEM WITH THE HELP OF GIVEN HINTS [ MOUNTAINS, DESERTS, FORESTS, PONDS] [ 1] Fish, water, lotus flower----------------------------------- [2] Sand, Camel, Cactus --------------------------------------- [3] Dense trees, wild animals, soil ----------------------------- [4] Coniferous trees, sheep, snow ----------------------------

20. No. 6- Write some examples of Biotic :-PLANTS, ANIMALS ---------------, ---------------,-----------------------. Abiotic :- Land ,--------------,-------------------,-------------------.

21. No.7 – Fill the box with the examples of your surrounding:- HUMAN MADE ENVIORONMENT NATURAL ENVIRONMENT CAR, FAN --------, ---------, ---------, ---------, ----------, -----------, -----------, -----------. RIVER, MOUNTAIN , ----------,------------,--------------.

22. [NO.8] IDENTIFY THE FOLOWING WATER BODIES NAME-------------------- NAME -------------------- NAME ------------------- NAME ------------------

23. EXERCISES Q(iv). Give four examples of human made environment ? Answer. Bridges, Parks, Road, Buildings, etc are example of human-made environment. Q(v). Question. What is lithosphere? Answer. Lithosphere is the hard top layer of the earth. Q(vi). Whish are the two major components of biotic environment? Answer. Plants and animals are two major components of biotic environment. Q(vii) Question What is biosphere? Answer.. Biosphere it is the narrow zone of the earth where land, water and air support life by interacting with each other is called biosphere. Question 2. Tick the correct answer. Q( i ) Which is not a natural environment. (a) Desert. (b) Aquarium. (c) Forest. Answer. (b) Aquarium. Q(ii) Which is not a component of human environment. (a) Land. (b) Religion. (c) Community. Answer.(a) Land. Q(iii) Which is a human made environment. (a)Mountain. (b) Sea. (c) Road. Answer. (c) Road.

24. EXERCISES Q(iv) Which is a threat to environment. (a) Growing plant. (b) Growing population. (c) Growing crops. Answer. (b) Growing population. Question 3. Match the following. 1 Biosphere. (a) blanket of air which surrounds the earth. 2 Atmosphere. (b) domain of water. 3 Hydrosphere. (c) our surrounds. 4 Environment. (d) narrow zone where land, water and air interact. Answer. Matched pair with correct answer : 1 Biosphere. (d) narrow zone where land, water and air interact. 2 Atmosphere. (a) blanket of air which surrounds the earth.. 3 Hydrosphere. (b) domain of water. 4 Environment. (c) our surrounds.

25. Question 4. Give reasons: ( i ) Man modifies his environment? Answer. Man modifies his environment to meet his various needs. For example, he clears forests for obtaining land for agriculture and for making shelter. He extracts minerals from the earth for making various things. He makes dams for producing electricity. These ae a few of the ways in which man modifies his environment. (ii) Plants and animals depend on each other. Answer. Animals, whether carnivores or herbivores, ultimately depend on plants for their food. Also,plants provide fresh oxygen to animals to breath in. These keep the environment clean and provide shelter to a number of animals on the other hand, animals provide carbon dioxide which plants use for making their food. Dead and decaying matter animals provide nutrients or plants to help them grow.

26. Q3. Write the significance of atmosphere. Ans. It protects us from the harmful rays and scorching heat of the sun. Q4. What do you mean by barter system? Ans. It is a trade in which goods are exchanged without the use of money. Q5. What is hydrosphere? Ans. The domain of water is referred to as hydrosphere. Q6. What hydrosphere comprises of? Ans. It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc.

27. EXERCISES Q7. Which are the two major components of biotic environment? Ans. Plants and animals are the two major components of biotic environment. Q8. Name the basic component of natural environment? Ans. Air, water, land and living beings are the basic component of natural environment. Q9. Why is hydrosphere important? Ans. The hydrosphere is important because it comprises water, which sustains a variety of life forms. Q10. Give four examples of human made environment. Ans. Examples of human made environment are parks, buildings, bridges, roads, industries, monuments etc.

28. Q11. What do you mean by natural environment? Ans. Natural environment comprises of land, water, air, plants and animals. Thus, natural environment refers to both biotic and abiotic conditions existing on the earth. Q12. Why is lithosphere important? Ans. Lithosphere is important because it provides us forests, grasslands for grazing, land for agriculture and human settlements. It is also a source of mineral wealth. Q13. What is environment? 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.

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