Exam-Focused Revision Notes for CBSE Class 7 Social Science Chapter 1 - Environment
FAQs on Environment Class 7 Notes CBSE Geography Chapter 1 (Free PDF Download)
1. What is the Ecosystem?
The ecosystem is an enlarged community that comprises organisms, animals, plants, microbes, etc. that are situated in one particular location. There are several nutrient cycles that tend to link so many components of the physical and the living nature. Some of the examples of an ecosystem would include grassland, a rainforest, a mountain, a desert, and so much more.
2. What are the Biotic Components?
According to The Environment Class 7 Notes, Biotic components comprise the living things that make up the environment such as plants and animal life.
3. What are Abiotic Components?
Abiotic components can be defined as those components of the environment which are of non-living, physical, and chemical nature. Some examples include air, water, wind, light, minerals, and glass.
4. What is the difference between the Natural and Human Environment?
The natural environment consists of all the natural forces such as air, water, land, animals, plants, and much more. The human environment consists of human interactions with the environment.
5. What do you understand about the lithosphere?
The lithosphere is the subdivision of the natural environment. It can be defined as the solid surface or the hard layer of the earth's surface. It is built of minerals, stones, pebbles, and rocks. This top crust of the earth is covered with a thin film of soil. The surface of the lithosphere is irregular and includes natural landforms like plateaus, mountains, valleys, deserts, plains, etc. It plays a vital role in our lives as it gives us forests for getting food commodities, land for cultivation and human settlement, and grasslands for grazing. Also, it is a natural reservoir of minerals.
6. What is the atmosphere?
The atmosphere is a thin film of air that surrounds the earth. It is made of different types of gases like nitrogen, oxygen, carbon dioxide, sulphur, water vapours, dust particles, etc. The atmosphere sticks to the earth through the gravitational force. This force is responsible for holding the atmosphere across the earth. It prevents humankind from scorching and avoids the harmful rays of the Sun. The changes in the atmosphere initiate modifications in the weather and climate.
7. How are humans responsible to modify the natural environment?
Human activities are responsible for changing the natural environment. The needs of people are increasing day by day. Hence, they tend to change the environment to fulfil their requirements. Human beings sometimes destroy nature to get precious resources like wood, minerals, food, and other materials to earn a huge amount of money. Many constructors destroy natural vegetation to build industries, roads, corporate offices, etc. This way humans are changing ecosystems to date.
8. Write different domains of the environment.
The different domains of the environment are:
Lithosphere - It is the uppermost surface of the earth. Hence, it’s known as the “Earth’s Crust”. It is built of minerals and rock. It is surrounded by a thin film of soil. It gives us grasslands, forests, etc.
Atmosphere - It’s a slim layer of air that surrounds our planet earth. The atmosphere is made up of dust particles, water vapours, gases like hydrogen, oxygen, etc.
Hydrosphere - Hydrosphere refers to the water reservoirs present on the earth. It consists of water reservoirs like rivers, lakes, seas.
Biosphere - It comprises living creatures like plants and animals.
9. How have human beings adapted to the environment?
Human beings have been dependent on nature since ancient times. They have been interacting with nature and moulding themselves according to it. Ancient humans have changed themselves so that they can live in their natural surroundings. They had an easy life and fulfilled their needs from the environment itself. With gradual development, humans learnt to grow crops and rear animals for their livelihood. Steadily, different modes of transportation arose and trade started. In the modern world, the invention of the Internet has made everything easy. This is how humans have adapted to nature.
10. Define the environment.
The surrounding we live in is composed of various living and nonliving components which make our existence possible and is known as the environment. The living components include plants and animals whereas the non-living components include the land, air, water etc.
11. Define the terms Biotic and Abiotic?
The term "biotic" is cast by the combination of two terms, "bio", which means life, and "ic", which means like. In this manner, the term implies life-like and is identified with all the living substances present in an ecosystem.
Plants, Animals, fisheries, and so forth comprise the biotic elements. The term abiotic alludes to all the nonliving elements present in an environment. Daylight, water, and land all comprise abiotic factors.
12. Explain the Natural Environment?
The natural environment incorporates all living and nonliving things occurring naturally or free gifts of nature. The natural environment incorporates land, water, air, plants, and animals. This environment incorporates the connection of every living species, atmosphere, climate, and common assets that influence human existence.
13. How can I effectively revise Social Science?
To revise Social Science effectively, create a study schedule, review your class notes and textbooks, make concise summary notes, use visual aids like charts or diagrams, practice answering past exam questions, and seek clarification from your teachers or our Vedantu master teachers if needed.