(i) Ocean water is salty.
(ii) The quality of water is deterioting.
(i) Oceanic water is salty because it obtains large amount of dissolved salts. Most of the salt is sodium chloride or contains the common table salt that we eat.
(ii) The quality of water is deteriorating as reasons given below:
- Garbage that we throw in the river.
- Chemicals pollutes water that are released from industries.
- Residues of the harmful insecticides and pest resistant’s flowing in from the fields.
- Unburnt or half burnt corpses of men and animals thrown in water bodies.
Popular Questions of Class 7 Social Science - Our Environment (Geography)
- Q:-
Imagine an ideal environment where you would love to live. Draw the picture of your ideal environment.
- Q:-
(i) There is scanty vegetation in the deserts.
(ii) People of the Sahara desert wear heavy robes. - Q:-
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.
- Q:-
(i) Wet clothes take longer time to dry on a humid day?
(ii) Amount of insolation decreases from equator towards poles? - Q:-
(i) Today’s world is shrinking.
- Q:-
(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 - Q:-
(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? - Q:-
(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 - Q:-
(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? - Q:-
(i) Sahara is located in which part of Africa
(a) eastern (b) northern (c) western
(ii) Sahara is what type of desert
(a) cold (b) hot (c) mild
(iii) The Ladakh desert is mainly inhabited by
(a) Christians and Muslims
(b) Buddhists and Muslims
(c) Christians and Buddhists
(iv) Deserts are characterised by
(a) scanty vegetation
(b) heavy precipitation
(c) low evaporation(v) Hemis in the Ladakh is a famous
(a) temple (b) church (c) monastery
(vi) Egypt is famous for growing
(a) wheat (b) maize (c) cotton
Recently Viewed Questions of Class 7 Social Science - Our Environment (Geography)
- Q:-
(i) What is atmosphere?
(ii) Which two gases make the bulk of the atmosphere?
(iii) Which gas creates green house effect in the atmosphere?
(iv) What is weather?
(v) Name three types of rainfall?
(vi) What is air pressure? - Q:-
(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 - Q:-
(i) Solve this Crossword puzzle with the help of given clues:
/7th_social science - our environment (geography)_4_1_5_1639752597_50.jpg)
- Q:-
(i) The rock which is made up of molten magma is
(a) Igneous (b) Sedimentary (c) Metamorphic
(ii) The innermost layer of the earth is
(a) Crust (b) Core (c) Mantle
(iii) Gold, petroleum and coal are examples of
(a) Rocks (b) Minerals (c) Fossils
(iv) Rocks which contain fossils are
(a) Sedimentary rocks
(b) Metamorphic rocks
(c) Igneous rocks
(v) The thinnest layer of the earth is
(a) Crust (b) Mantle (c) Core - Q:-
(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 - Q:-
(i) The process by which water continually changes its form and circulates between oceans, atmosphere and land
(a) Water cycle (b) Tides (c) Ocean currents
(ii) Generally the warm ocean currents originate near
(a) Poles (b) Equator (c) None of these
(iii) The rythmic rise and fall of ocean water twice in a day is called
(a) Tide (b) Ocean current (c) Wave - Q:-
Imagine an ideal environment where you would love to live. Draw the picture of your ideal environment.
- Q:-
(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? - Q:-
(i) There is scanty vegetation in the deserts.
(ii) People of the Sahara desert wear heavy robes. - Q:-
(i) Sahara is located in which part of Africa
(a) eastern (b) northern (c) western
(ii) Sahara is what type of desert
(a) cold (b) hot (c) mild
(iii) The Ladakh desert is mainly inhabited by
(a) Christians and Muslims
(b) Buddhists and Muslims
(c) Christians and Buddhists
(iv) Deserts are characterised by
(a) scanty vegetation
(b) heavy precipitation
(c) low evaporation(v) Hemis in the Ladakh is a famous
(a) temple (b) church (c) monastery
(vi) Egypt is famous for growing
(a) wheat (b) maize (c) cotton
- NCERT Chapter