Ncert Grade 7 Geography Chapter 1 Environment

NCERT
Grade 7
Geography
Chapter 1
Environment
Picture Board & Q/A
By Shagun Patel

Barter System
• Barter system is a kind of trade in which goods are
exchanged without the use of money.
15 Barter System

1. Ravi's teacher told him that the world around is always changing. New buildings
come up in place of open grounds, and forests are turned into farms. The
variety of birds and animals also changes because of this. When he asked his
parents about it, they said it's true that our environment changes all the time.
What is the environment?
A. The system of politics in the society.
B. Everything around us such as plants , buildings , books , chairs , temples , etc.
C. The flora and fauna around us.
D. All the technology and buildings in the cities.
Answer – B. Everything around us such as plants , buildings , books , chairs , temples ,
etc.
16 Question – Answers :: Multiple Choice Questions

2. Environment is divided into three components - Natural
, Human and, Human-made . Which of the following are
examples of natural components of our environment ?
A.Buildings , hoardings , schools and houses.
B.Electronics such as mobiles , laptops , television , fridge ,
etc.
C.Communities , religions , culture and economics.
D.Trees , mountains , valleys , rivers , etc.
Answer – D.Trees , mountains , valleys , rivers , etc.

3. Our ancestors adapted to the natural environment without making much changes
to it, living in caves, on a simple diet of plants or animals. But as times changed, our
needs increased, and we started modifying (even at times destroying) the natural
environment . Which of the following disturbs the balance in our natural
environment?
A. Planting more trees.
B. Building less factories.
C. Releasing chemical wastes from the factories into rivers and lakes.
D. Recycling more.
Answer – C. Releasing chemical wastes from the factories into rivers and lakes.

4. Biotic means related to living (such as plants, animals, etc.), whereas
abiotic is the opposite, and means 'without life' (such as rocks, rivers,
winds, etc.) Which environment are both biotic and abiotic components a
part of?
A. The human environment.
B. The natural environment.
C. The economic environment.
D. The social environment.
Answer – B.The natural environment.

5. The Earth's solid crust, the hard and thin top layer of the Earth, is made
of rocks and minerals. It is covered by a thin layer of soil, and this is where
most trees grow and animals and humans live. What is the Earth's crust
also known as?
A. The Lithosphere.
B. The Biosphere.
C. The Hydrosphere.
D. The Atmosphere.
Answer – A. The Lithosphere.

6. Land is found over the continents and also on the ocean floors, under deep
waters. And the Lithosphere is the top, hard, thin, soiled layer of the Earth
that contains all the various landforms such as mountains, plains, valleys,
and...
A. Rivers.
B. Lakes.
C. Oxygen.
D. Plateaus.
Answer – D. Plateaus.

7. The environment we live in is made of many parts related to the air, water, land, and
life. Which is the domain (part) of the environment that is also called the planet's crust,
and contains the land we use for farming, building houses, industries, roads, and for
mining oil and minerals?
A. The Biosphere.
B. The Atmosphere.
C. The Hydrosphere.
D. The Lithosphere.
Answer – D. The Lithosphere.

8. The environment we live in is made of many parts related to the air,
water, land, and life. The Lithosphere is the domain (part) of the
environment that is also called the planet's crust, and contains the land we
use for farming, building houses, industries, roads, and for mining oil and
minerals. Similarly, the domain of water is referred to as the hydrosphere. It
comprises various ________ of water and different types of _________ such
as rivers, lakes, seas, oceans, etc.
A. insects , animals.
B. plants , herbs.
C. sources , water bodies.
D. colours , water.
Answer – C. sources , water bodies.

9. The environment we live in is made of many parts related to the air,
water, land, and life. The water-related part of the environment is called
the hydrosphere (hydro meaning water), the one related to life is called
the biosphere, and the upper layer of rock and soil is called the
lithosphere. Similarly, what is the domain of the thin layer of air that
surrounds the Earth called?
A. The Biosphere.
B. The Hydrosphere.
C. The Atmosphere.
D. The Lithosphere.
Answer – C. The Atmosphere.

10. Changes in atmosphere bring about changes in the weather and
climate which may be harmful to humans, because the air in the
atmosphere has many gases and a lot of dust and water vapour. Which of
the following does the atmosphere protects us from?
A. Animals.
B. Insects.
C. Wars.
D. Ultra – Violet Rays of the Sun.
Answer – D. Ultra – Violet Rays of the Sun.

11. All plants , animals and human beings depend on their immediate
surroundings for life-supporting nutrients. Often, they are all also
interdependent on each other. What is this relationship among the living,
as well as between the living and their surroundings forms called?
A. The Biosphere.
B. Environment.
C. Ecosystem.
D. Animal and Plant Kingdom.
Answer – C. Ecosystem.

12. Humans change the environment to make their lives safer
and more comfortable. Which environment is this modification
of natural environment by humans to meet their ever-growing
needs for food, money, products, technology, etc. a part of?
A. Natural Environment.
B. Human Environment.
C. Animal Environment.
D. Plant Environment.
Answer – B. Human Environment.

13. The environment is made up of the hydrosphere (hydra means water),
the Atmosphere (related to air and the sky), the Lithosphere (lithos
means stone), and the Biosphere (bio means life). The Biosphere is a
narrow zone of the Earth where land, water, and air interact with each
other to support life. And which kingdoms together make the biosphere?
A. The Human and Animal Kingdom.
B. The Animal and Plant Kingdom.
C. The Plant and Human Kingdom.
D. The Human and Reptile Kingdom.
Answer – B. The Animal and Plant Kingdom.

14. We like sipping hot cups of milk or coffee on winter evenings, and relish
scoops of ice-cream on hot summer days. This is because there is harmony
(a good connection) between us (the human environment) and the natural
environment. Which of the following activities of humans disturb the natural
environment very much?
A. Planting Trees.
B. Using Bicycles.
C. Building Wooden Huts in Deserts.
D. Throwing industrial wastes into Rivers , Lakes , Ponds , Etc.
Answer – D. Throwing industrial wastes into Rivers, Lakes , Ponds , Etc.

❖ Define the following :-
1) Environment – Environment means whatever we are surrounded by. It is also the basic life
support system of all living beings.
2) Natural Environment – Natural Environment is an environment which is completely made
by nature.When we are completely surrounded by natural things , it is our natural
environment.
3) Lithosphere – It includes top layer of the earth and the ocean basins.
4) Hydrosphere – It is that 3/4th portion of the Earth which is completely made up of water.
5) Atmosphere – It is the gaseous layer above the surface of Earth that surrounds it.
6) Biosphere – It is the narrow portion of the Earth where we find all the things available for
our survival.
7) Ecosystem – It is the relationship that organisms have with each other and their surrounding
environments.
30 Question and Answer :: Define

Fun Facts.
I. The United Nations Environment Programme has declared the 5th of June
asWorld Environment Day.
II. A study has shown that there are possibly over 30 million species of
insects living together in the canopies of tropical forests.
III. Cryosphere is the frozen part of the hydrosphere, made of ice-caps, ice
bergs, glaciers, etc.
IV. Because it cannot be recycled, aluminum foil-wrap is harmful to the
environment.
V. Seasons and seasonal changes in climate are direct results of the tilt of the
Earth towards or away from the Sun.
VI. Seasons and seasonal changes in climate are direct results of the tilt of the
Earth towards or away from the Sun.
31 Fun Facts

Fun Facts
I. Aquatic Ecosystem these are of two types:
FreshWater Ecosystems: (a) Lotic - free-flowing, running waters in springs,
streams, rivers, etc. (b) Lentic - still waters in lakes, ponds, ditches, etc.
Marine Ecosystems: Deep-water bodies such as oceans and estuaries.
II. Terrestrial (land-related) and aquatic (water-related) are the two
types of natural environments, whereas farms, gardens, dams, etc.
are called artificial environments.
III. Humans have changed Earth's environment a lot since industrialization
(factories) started. Pollution from our activities causes acid rains, which, in
turn, affects the environment even more.
IV. All water on Earth, including the clouds and water vapour in the air,
and deep-water lakes, is part of the Earth's hydrosphere (hydro
means water-related).
32 Fun Facts

Fun Facts
I. If Earth were a colder planet, like Pluto is, then it would not matter how
much water we had, because it would all be frozen to ice! On the other
hand, if we were on a very hot planet, all of the water would be vapour and
steam, in a gaseous state.
II. Bubbles of air and gas, and even molecules of water, can remain locked in
glaciers for millions of years.
III. A cycle is a series of change which comes back to the starting point and
repeats. Cycling of substances is a way in which chemical substances moves
through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and
hydrosphere) compartments of the Earth's environment.
IV. The word Lithosphere means ball of stone in Greek.
V. All terrestrial planets have lithospheres; the lithospheres of Mercury,Venus,
and Mars are much thicker and more rigid than that of the Earth.
33 Fun Facts

Fun Facts
I. 97% of the Earth's water is saltwater (in oceans), and it contains too many
chemicals and impurities to be potable (safe to drink). 2% of the Earth's
water that is 'safe to drink' is trapped on mountain tops and in polar ice,
glaciers, etc , and even that is now going to waste due to global warming. In
fact, only 1% of water on Earth is clean and fresh and ready for us to use. So
let's not waste it!
II. 70% of the Earth's surface is covered in water.
III. Habitat means the natural environment someone lives in.
IV. Life has existed on Earth for about 3.7 billion years now, almost since the
birth of the planet.
34 Fun Facts

Ncert Grade 7 Geography Chapter 1 Environment

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