Important Questions Class 7 Social Science Our Environment Chapter 1
Important Questions Class 7 Social Science Our Environment Chapter 1
Learning the capital cities of every country, studying maps, or even learning cartography is only a small portion of what geography includes. Geography looks at not just where things are on Earth but also why they are there rather than someplace else—a notion known as “location in space.” The Environment is the first chapter of Class 7 Social Science Our Environment. The environment includes both living and nonliving things that surround us. It consists of natural forces such as chemical and physical ones. Land, water, air, vegetation, and animal life make up the natural environment. Humans interact with their surroundings and change them to suit their needs. Chapter 1 Class 7 Social Science Our Environment Important Questions is the perfect study guide to help students understand the complex concepts of Chapter 1.
The foundations of geography can be found worldwide. And at Extramarks, we recognise the significance of providing important questions for each chapter on a subject like this. The NCERT textbook, other reference books, past years’ exam papers, and other sources have all been used by Extramarks subject specialists to compile Social Science Our Environment Class 7 Chapter 1 Important Questions. To assist students in understanding each chapter, our Geography experts have compiled a list of step-by-step solutions. Students can register today with Extramarks and access Class 7 Social Science Our Environment Chapter 1 Important Questions easily.
Along with Important Questions Class 7 Social Science Our Environment Chapter 1, students can easily access materials like NCERT Solutions, CBSE revision notes, past years’ question papers, NCERT books, and more on the Extramarks’ website.
Important Questions Class 7 Social Science Our Environment Chapter 1- with Solutions
Geography experts at Extramarks have designed an entire list of Important Questions Class 7 Social Science Our Environment Chapter 1 with the help of different sources. Environment refers to the objects that surround us, both living and nonliving. It is made up of organic forces like chemical and physical ones. The natural environment comprises land, water, air, plant, and animal life. Humans interact with and modify their surroundings to meet their needs. These questions and solutions help students to comprehend the environment in a better manner.
Mentioned below are a few Important Questions Class 7 Social Science Our Environment Chapter 1:
Question 1. What is the Biosphere?
Answer 1. The biosphere, also known as the living world, is a small area of the planet where air, water, and land interact to support life. The biosphere is made up of both the plant and animal kingdoms.
Question 2. Explain the human environment in a few words.
Answer 2. Initially, it was simple for humans to adapt to their surroundings, but as their requirements grew through time, they began changing their surroundings. The following are the causes of modification:
- The environment changes to produce more food.
- For building homes and other structures, the surrounding area is changed.
- For producing the items needed regularly.
- For defence against natural events.
Question 3. What is an ecosystem?
Answer 3. An ecosystem is the collection of all living things that interact with one another, with the physical and chemical elements of the environment in which they exist, and with each other through exchanging materials and energy.
Question 4. What is a hydrosphere?
Answer 4. Hydro denotes water. The hydrosphere is the portion of the Earth that is made up of water or related substances.
Question 5. Which are the two major components of the biotic environment?
Answer 5. The biotic ecosystem is mostly composed of both plants and animals.
Question 6. What function does oxygen in the air serve?
Answer 6. Living things require oxygen to survive. A person inhales various gases from the atmosphere, but only oxygen is taken up by the red blood cells, and the remaining air is exhaled from the body through the lungs.
Question 7. What do you mean by natural environment?
Answer 7. The natural environment is made up of the basic elements and living things that exist in it without the intervention of humans, such as the land, water, air, plants, and animals.
Question 8. Can plants directly absorb nitrogen from the air?
Answer 8. No, plants cannot absorb nitrogen from the air directly. The bacteria convert the atmospheric nitrogen to a nitrogenous molecule so plants can absorb it more easily.
Question 9. What is the lithosphere?
Answer 9. The lithosphere is the term used to describe the solid crust or the hard top layer of the Earth. It is covered in a thin soil layer composed of rocks and minerals. It has varied terrain, including mountains, plateaus, plains, and other landforms.
Question 11. Which are the major components of the environment?
Answer 11. The environment is made up of three parts, including:
- Man-made Environment: A man-made environment is one that people have constructed—for instance, structures, bridges, businesses, highways, etc.
- Human Environment: The presence of many communities, families, cultures, political and economic systems, etc., creates the human environment.
- Natural Environment: The biotic and abiotic elements that make up the natural environment are included. Land, air, water, living things, etc., are a few examples.
Question 12. Why are plants and animals interdependent?
Answer 12. Animals and plants depend on one another for food and the oxygen they breathe. Plants utilise animals’ exhaled carbon dioxide to create food, whereas animals that consume oxygen that plants produce during food synthesis do so to breathe.
Question 13. Give four examples of a human-made environment.
Answer 13. The human-made environment includes four types of things: industry, parks, buildings, and bridges.
Question 14. What has changed in how people connect with their surroundings?
Answer 14. According to their needs, humans alter nature. At first, people changed to fit in their environment. They were simple people who relied on nature to meet their needs.
Later on, new techniques and technologies were developed as their demands changed. Agriculture and the domestication of animals came with settled life. Trade and commerce developed as a result of the invention of the wheel and abundant food. A barter system was developed.
Production was expanded by the industrial revolution and advances in transportation. The development of the communication system sped up and simplified life. People discovered new methods to interact with which further altered their surroundings.
Question 15. What made Ravi sad upon returning to school after the holidays?
Answer 15. Ravi observed that the sole playground near the school had been dug up as he returned to class after a lengthy break. He was informed that there would be a multi-story structure built there.
This saddened him since the expansive playground with grass, marigolds, and butterflies would never again exist. He spoke about his peers about his thoughts.
Question 16. What components make up our environment in total?
Answer 16. Things around us make up our environment. The environment consists of nature with elements such as mountains, rivers, animals, trees, etc. It also consists of all human-made structures such as bridges, towns, roads, houses, offices, etc. and things such as furniture, clothes, consumer products, etc.
Question 17. Compare and contrast the climates of Kerala and Rajasthan.
Answer 17. Kerala, a state in southern India, experiences a lot of precipitation. Coconut plantations and lovely green foliage can be seen there.
On the other side, Rajasthan has an extreme deficit of rainfall. Its vegetation consists of babul, kikar, and thorny plants and shrubs due to lack of water.
Question 18. Give reasons.
- Man modifies his environment.
- Plants and animals depend on each other
Answer 18. Reasons for the above are:
- Man modifies his Environment: Since the Environment is the fundamental component of life support, man adjusts it to meet his requirements. He changes the landscape by building residences and businesses in which people live and work. The natural system and the habitats of animals have been disturbed by human usage of fossils for personal development.
- Plants and animals depend on each other: Because plants are producers and animals are consumers, they mutually depend on one another. Humans breathe in the oxygen plants release into the atmosphere and exhale carbon dioxide, which helps plants to make their food.
In the above section of Important Questions Class 7 Social Science Our Environment Chapter 1, all the essential topics of the chapter are covered.
Benefits of Solving Important Questions Class 7 Social Science Our Environment Chapter 1
Important Questions Class 7 Social Science Our Environment Chapter 1 by Extramarks is highly recommended to students r. This list of important questions can make this subject easy to understand and prepare the students to frame accurate answers Students gather confidence by answering the important questions and going over their solutions.
Mentioning below are some benefits of solving Important Questions Class 7 Social Science Our Environment Chapter 1:
- Important Questions Class 7 Social Science Our Environment Chapter 1 It covers all the chapter end questions along with their comprehensive answers explained in detail with proper illustrations.
- As the explanations are comprehensive, the fundamentals of the chapter are understood by the students in a better way.
- Students can entirely rely upon these important questions as these are made following all the guidelines laid by CBSE.
- The answers are explained in detail, which gives students an idea of how to attempt a question in the board exam in the right manner.
Extramarks provides comprehensive learning solutions for students from Class 1 to Class 12. Our website has other abundant resources as well, apart from the important questions and solutions. Students can easily click on the links given below to access some of these resources:
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Q.1 What is the importance of Lithosphere?
Ans
Lithosphere is the domain that provides us forests, grasslands for grazing, land for agriculture and human settlements and minerals for industries.
Q.2 Name six Eco-systems.
Ans
1. Grassland Ecosystem.
2. Desert Ecosystem.
3. Mountain Ecosystem.
4. Lake and ponds Ecosystem.
5. River Ecosystem.
6. Ocean and seas Ecosystem.
Q.3 What is Barter system?
Ans
It is a trade in which goods are exchanged without the use of money.
Q.4 What are the three main components of the lithosphere?
Ans
The lithosphere is the solid part of the earth. It consists of three main layers: crust, mantle and core.
Q.5 What are the creatures that you find in the desert ecosystem?
Ans
Camels, snakes, lizards and insects are found in the desert ecosystem.
Q.6 Explain how plants and animals depend on each other.
Ans
1. Plants give out oxygen (O2) and take in carbondioxide (Co2). Animals give out Co2 and take in O2.
2. Plants give timber, medicine, rubber and shelter.
3. Animals depend on plants for food.
4. Plants take in the Sun’s energy and produce food; animals get the Sun’s energy from plants indirectly.
Q.7 What are the three components of Environment?
Ans
The three components of Environment are given as follows:-
a. Natural components e.g. water, air, land.
b. Human made components e.g. buildings, parks, bridges, roads, and monument.
C. Human components e.g. individual, family.
Q.8 How do humans affect the environment?
Ans
Humans modify the natural environment for their benefit. Human beings make cars, mills, and factories and manufacture containers. The car fumes pollute the air, water is collected in a pot, food is served in vessels and land is used to build factories. They destroy the atmosphere and pollute the environment.
Q.9 What are the two components of the environment?
Ans
The environment is a combination of natural and human made phenomena. While the natural environment refers to biotic elements like plants and animals, the abiotic refers to the world of non-living elements e.g. land, minerals etc.
Q.10 Describe components of an Eco system?
Ans
All plants, animals and human beings depend on their immediate surroundings and often they are also interdependent on each other. This relation between the living organisms as well as the inter-relationship between the organisms and their surroundings, forms an Eco-system.
Q.11 What is the importance of Atmosphere?
Ans
i) The atmosphere is the thin layer of air that surrounds the Earth.
ii) It protects us from the harmful rays and scorching heat of the Sun.
iii) The changes in the atmosphere produce changes in the weather and climate.
[The gravitational force of the Earth holds the atmosphere around it. It consists of a number of gases, dust, and water vapour.]
Q.12 Define Hydrosphere.
Ans
The domain of water is referred to as Hydrosphere. It comprises various sources of water and different types of water bodies like rivers, lakes, Oceans etc.
Q.13 Define Lithosphere.
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 consists of mountains, plateaus, plains and valleys. Landforms are found over the continents and also on the ocean floors.
Q.14 What is natural environment?
Ans
Land, water, air, plants and animals comprise the natural environment.
Q.15 What is the relationship between environment and human beings?
Ans
Human activities such as agriculture, transport, mining etc. have bad effect on the environment. The polar caps are melting and many plants and animals have gone extinct. Pollution from vehicles and factories can cause acid rain.
Q.16 What are the three main components of the Biosphere?
Ans
The biosphere is made up of the parts of Earth where life exists—all ecosystems. The components are:
a. Hydrosphere includes water in the oceans, lakes, ponds, etc., and covers about 71% area of the earth’s surface.
b. Atmosphere is a thick gaseous mantle which envelopes the earth. Oxygen, nitrogen and carbon dioxide serve as metabolites for living organisms
c. The solid component of the earth is called the lithosphere.
Q.17 Define Biosphere.
Ans
The life-providing layer on the Earth’s surface is called Biosphere. There is a small layer of contact between air, land and water.
Q.18 Name the different types of Environments?
Ans
1. Physical or abiotic, e.g., land, water, etc.
2. Biological or biotic, e.g., plants, animals and human.
Q.19 What is an Environment?
Ans
Humans, animals and plants are influenced by the surroundings in which they exist. These surroundings are called natural conditions which make up the Environment.
Q.20 How can you see the atmosphere?
Ans
We cannot see the atmosphere as the air is transparent. We live at the upper layer of the earth which is under the atmosphere, a layer of gases surrounding our planet. Tiny particles, known as dust, smoke, and sea salt are carried by winds around the globe.
Q.21 Why is our environment changing?
Ans
Our environment is changing because our needs are increasing day by day. We are therefore modifying and at times even destroying our natural surroundings. Major contributors include the burning of fossil fuels for heating and energy generation and the use of chlorofluorocarbons (CFCs).
Q.22 What is the solid crust or the hard top layer of the earth called?
Ans
The lithosphere is the solid crust or the hard top layer of the earth. The lithosphere is the rocky outer part of the Earth. It is made up of the brittle crust and the top part of the upper mantle. 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.
Q.23 Match the following:
| List A | List B |
| A. Men | I. Natural resource |
| B. Parks | ii. Social animal |
| C. Bridges | iii. Human- made |
| D. Land | iv. Green area |
Ans
Man – Social animal
Parks – Green area
Bridges – Human made
Land – Natural resource
Q.24 What are the different domains of Environment?
Ans
All the biotic and abiotic conditions prevail around us refers as environment in general. There are three different domains of environment:
- Lithosphere
- Atmosphere
- Hydrosphere
And the combination of all the above is termed as Biosphere.
Q.25 What do you understand by the Human Environment?
Ans
Natural and physical environment and the relationship of people with that environment including physical, biological, cultural, social, and economic factors in a given area.
Q.26 What is an Ecosystem?
Ans
Ecosystem is a system in which all the living and non-living species or things are related to each other by the direct or indirect methods.
Q.27 What do you know about Environment?
Ans
The product, species and things available in our surroundings are generally called as environment. In other words, all the biotic and abiotic conditions that prevail around us are known as environment. Environment provides the air we breathe, the water we drink, the food we eat and the land where we live.
Q.28
What do you understand by the statement “man modifies his environment”?
Ans
With the passage of time, our society has developed tremendously. Man’s needs and demands increased manifold. As a result, he started modifying nature to his own requirement; agricultural land converted to commercial areas, residences and industries; roads became crowded with traffic; smoke from vehicles caused air pollution and the honking of the horns to noise pollution. Hence, man is utilising natural resources at a tremendous rate to satisfy his needs.
Q.29 Complete the figure given below:
COMPONENTS OF NATURAL ENVIRONMENT
Ans
Q.30
Complete the figure showing components of human environment.
Ans
Q.31 What do you understand by ecosystem ecology?
Ans
Ecosystem ecology is an integrated study of biotic and abiotic components of an ecosystem and their interactions within an ecosystem framework. The study examines how ecosystems work and relates this to their components such as chemicals, bedrock, soil, plants and animals.
Q.32 What does the shaded portion in the picture signify?
Ans
Shaded part shows the biosphere and providing the life supporting zone. It is the zone where all the three spheres meet and provide life supporting conditions.
Q.33
Discuss the various uses of water?
Ans
Water is used for various purposes such as:
1.Commercial water use includes fresh water for motels, hotels, restaurants, office buildings and other commercial facilities.
2. Domestic water use is probably the most important daily use of water for most people. It includes using water at home every day for drinking, food preparation, bathing, washing clothes and dishes, flushing toilets and watering lawns and gardens.
3. Industrial water usage is a valuable resource to the nation’s industries for purposes such as processing, cleaning, transportation, dilution and cooling in manufacturing facilities.
4. Irrigation water usage includes artificial application of water to farms, orchards, pasture, and horticultural crops to increase the production.
Q.34 What are the various uses of land?
Ans
Particular areas of land can be utilised by humans in various ways. It includes residential, institutional, business, industrial, agricultural, forestry, park and other relatively natural land uses. Each of these broader categories can be further subdivided, which is based on the nature and intensity of the activities undertaken.
Q.35 Write a short note on water?
Ans
Water is found in many places on earth like on the surface, within rocks below the surface and in the atmosphere. Water travels between different domains of the earth through water cycle. About 70% of the earth’s surface is covered with water and most of it is in the ocean. Only a small portion appear as freshwater which is found in rivers, lakes and groundwater. Freshwater is needed for drinking, farming and washing. Therefore, without water, life would not exist.
Q.36 How does biosphere effect climate?
Ans
Biosphere has a great impact on the climate because it is closely connected to the atmosphere. When plants harness sun’s energy through photosynthesis, oxygen is released into the atmosphere and carbon dioxide is absorbed. When plants and animals respire, carbon dioxide is added to the atmosphere and oxygen is taken in. Microbes living in soils add nitrous oxide gas to the atmosphere. The burning of biosphere components such as fossil fuels, forests and fields adds greenhouse gases such as carbon dioxide and nitrous oxide into the atmosphere. In this way the climate is affected.
Q.37 Discuss how man affected the environment?
Ans
During his development and expansion, man totally ignored the environment. He ruthlessly carried out his activities without considering its impact on the environment. Some of the basic impacts of this expansion are:
1. Deforestation: Trees absorb carbon throughout their lives by the process of photosynthesis. As man evolved, he slowly destroyed the forests. This caused several problems: less absorption of carbon dioxide from the atmosphere and more carbon released into air than being absorbed.
2. Pollution: Man is responsible for various kinds of pollution: air, water, noise and land. The burning of fossil fuels and dumping of waste in water bodies are some of the examples of pollution.
FAQs (Frequently Asked Questions)
1. What are the most fundamental definitions a student needs to memorise from Chapter 1 of Geography for Class 7?
Students should concentrate on a few important definitions that may be asked in short-answer or objective questions when studying for Class 7th Geography Chapter 1, “Our Environment.” Before reading Chapter 1 of the NCERT Book for Class 7th Geographies, you should be familiar with various terms, such as environment, biotic and abiotic components, ecosystem, lithosphere, atmosphere, and barter system. To get apt definitions of the terms, students can refer to Extramarks Important Questions Class 7 Social Science Our Environment Chapter 1.
2. Where can students obtain the long answers to NCERT questions?
Extramarks study material is the best option for you if you are looking for solutions to NCERT exercises. Students can find solutions to a variety of questions on Extramarks, whether they are short or lengthy. For Classes 1 through 12, an experienced group of professionals has compiled the solutions to all NCERT questions and additional questions relating to every chapter.
3. What makes Class 7 a significant grade?
Class 7 is a vital stage in every student’s academic journey. You would build a solid foundation of basics through the things you learn in Class 7 that will help you later in boards and competitive exams.