At Saralstudy, we are providing you with the solution of Class 7 Social Science - Our Environment (Geography) according to the latest NCERT (CBSE) Book guidelines prepared by expert teachers. Here we are trying to give you a detailed answer to the questions of the entire topic of this chapter so that you can get more marks in your examinations by preparing the answers based on this lesson. We are trying our best to give you detailed answers to all the questions of all the topics of Class 7th social-science-our-environment-geography so that you can prepare for the exam according to your own pace and your speed.
Imagine an ideal environment where you would love to live. Draw the picture of your ideal environment.
(i) There is scanty vegetation in the deserts.
(ii) People of the Sahara desert wear heavy robes.
Observe the photographs given below. These are various features made by a river. Identify them and also tell whether they are erosional or depositional or landforms formed by both.
(i) Wet clothes take longer time to dry on a humid day?
(ii) Amount of insolation decreases from equator towards poles?
(i) Today’s world is shrinking.
(i) Which is not a natural ecosystem?
(a) Desert (b) Aquarium (c) Forest
(ii) Which is not a component of human environment?
(a) Land (b) Religion (c) Community
(iii) Which is a human made environment?
(a) Mountain (b) Sea (c) Road
(iv) Which is a threat to environment?
(a) Growing plant(b) Growing population (c) Growing crops
(i) Why do the plates move?
(ii) What are exogenic and endogenic forces?
(iii) What is erosion?
(iv) How are flood plains formed?
(v) What are sand dunes?
(vi) How are beaches formed?
(vii) What are ox bow lakes?
(i) Which of the following gases protects us from harmful sun vays?
(a) Carbon dioxide (b) Nitrogen (c) Ozone
(ii) The most important layer of the atmosphere is
(a) Troposphere (b) Thermosphere (c) Mesosphere
(iii) Which of the following layers of the atmosphere is free from clouds?
(a) Troposphere (b) Stratosphere (c) Mesosphere
(iv) As we go up the layers of the atmosphere, the pressure
(a) Increases (b) Decreases (c) Remains the same
(v) When precipitation comes down to the earth in the liquid form, it is called
(a) Cloud (b) Rain (c) Snow
(i) Ocean water is salty.
(ii) The quality of water is deterioting.
(i) Name the continent in which the Amazon Basin is located.
(ii) What are the crops grown by the people of the Amazon Basin.
(iii) Name the birds that you are likely to find in the rainforests of the Amazon.
(iv) What are the major cities located on the River Ganga.
(v) Where is the one-horned rhinoceros found?
(i) Toucans are a type of
(a) birds (b) animals (c) crops
(ii) Manioc is the staple food of
(a) Ganga Basin (b) Africa (c) Amazon
(iii) Kolkata is located on the river
(a) Orange (b) Hooghly (c) Bhagirathi
(iv) Deodars and firs are a type of
(a) Coniferous trees (b) Deciduous trees (c) shrubs
(v) Bengal tiger is found in
(a) mountains (b) delta area (c) Amazon
(i) Which is not a natural ecosystem?
(a) Desert (b) Aquarium (c) Forest
(ii) Which is not a component of human environment?
(a) Land (b) Religion (c) Community
(iii) Which is a human made environment?
(a) Mountain (b) Sea (c) Road
(iv) Which is a threat to environment?
(a) Growing plant(b) Growing population (c) Growing crops
(i) On an outline map of the Indian Sub-continent, draw the rivers Ganga and Brahmaputra from the source to the mouth. Also show the important tributaries of both the rivers.
(ii) On the political map of South America, draw the equator. Mark the countries through which the equator passes.
(i) There is scanty vegetation in the deserts.
(ii) People of the Sahara desert wear heavy robes.
FOR FUN
Desert Game
This is a class room activity involving all the students. The teacher will create a list of desert creatures. The number of the creatures should be same as the number of students in the class. The creatures can be picked up from the categories of mammals, birds and reptiles. Mammals can include – camel, yak, fox, sheep, goat, antelope... Birds – raven, eagle, vulture, turkey... Reptiles – snakes ... Assign one desert creature to each student. Ask the student to write three characteristics of the creature on plain sheet of paper. (students can use index cards of size 10 cm × 15 cm). Questions such as - in what type of deserts it is
found? Major adaptation? Use to man? These characteristics will be used as clues in the guessing game. On the board make three columns – mammals, birs and reptiles. Paste a sheet of paper in the column under the particular category. The class can be divided in three to four groups. They will compete against each other in the ‘desert game’. Each group now
takes turn in guessing the correct answer. Explain to the class that they have to guess what animal matches the characteristics listed on the paper. For example:
• Animal of hot desert
• Has double set of eyelashes to keep away the sand
• The hide is used for making water bottles
The correct answer is ‘camel’. Within the group there will be a student who has prepared the card. That student should not answer. Ten points are awarded for the correct answer. This game will enable students to understand the desert. You can play the same game by taking different types of fruits, flora and the clothes the people wear.
Observe the photographs given below. These are various features made by a river. Identify them and also tell whether they are erosional or depositional or landforms formed by both.
(i) Collect pictures and photographs of forests and grasslands of different parts of world. Write one sentence below each picture.
(ii) Make a collage of rainforest, grassland and coniferous forests.
Imagine an ideal environment where you would love to live. Draw the picture of your ideal environment.
(i) Biosphere (a) blanket of air which surrounds the earth
(ii) Atmosphere (b) domain of water
(iii) Hydrosphere (c) gravitational force of the earth
(iv) Environment (d) our surroundings
(e) narrow zone where land water and air interact
(f) relation between the organisms and their surroundings