Class 7 Geography Chapter 1 Notes
CBSE Class 7 Geography Chapter 1 Notes pdf helps students to understand Environment Class 7 Notes. In class 7th Geography chapter 1 notes we discuss Environment, Domain of Environment, Ecosystem etc. Students can also download class 7 geography ch 1 notes pdf for offline study.
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What is environment
Environment: it is a French word Environer/Environner meaning “neighbourhood”.
- Place, people, things and nature that surround any living organism are called the environment.
- The environment is a combination of natural and human-made phenomena.
- human-environment related to the activities, creations and interactions among human beings.
- The natural environment is related to both biotic and abiotic conditions existing on the earth.
Biotic – All the living organisms in our environment are said to be biotic e.g. plants and animals.
Abiotic – All the non-living organisms in the environment form the abiotic. e.g. Land and mountain.
Natural Environment
The natural environment is comprised of all naturally occurring things like Land, water, air, plants and animals. The natural environment is further divided into four domains.
- Lithosphere- The 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 contains irregular surfaces with various landforms such as mountains, plateaus, plains, valleys, etc.
- Hydrosphere- Hydrosphere is The domain of water. It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc.
- Atmosphere- The atmosphere is the thin layer of air that surrounds the earth. It consists of a number of gases, dust and water vapour. The gravitational force of the earth holds the atmosphere around it. The atmosphere protects us from the harmful rays and scorching heat of the sun.
- The changes in the atmosphere produce changes in the weather and climate.
- Biosphere- The living organism that is Plant and animal kingdom together make the biosphere or the living world. It is a narrow zone of the earth where land, water and air interact with each other to support life.
What is Ecosystem?
This relation between the living organisms, as well as the relation between the
organisms and their surroundings, form an ecosystem. The ecosystem could be a large rainforest, grassland, desert, mountains, lake, river, ocean or even a small pond.
Human Environment
Human beings interact with the environment and modify it according to their need. Early humans adapted themselves to their natural surroundings. Humans learn new ways to use and change
the environment. They learn to grow crops, domesticate animals and lead a settled life. For example, The wheel was invented, people started a barter system, and trade and commerce started.
Key Points that we learn in ncert class 7 geography chapter 1 notes.
Key points help you to review geography chapter 1 notes class 7. These points (summary of class 7 geography chapter 1) also help you to memorise the important points of the chapter.
Environment– Whatever we see in our surroundings including places, people, things and nature that surround any living organism is called the environment.
Natural Environment- The natural environment is comprised of all naturally occurring things like Land, water, air, plants and animals.
Human Environment- The human environment is comprised of all things which are created or modified by humans according to their needs.
Biotic- All the living organisms in our environment are said to be biotic e.g. plants and animals.
Abiotic- All the non-living organisms in the environment form the abiotic. e.g. Land and mountain.
Lithosphere– The lithosphere is the solid crust or the hard top layer of the earth which is made up of rocks and minerals.
Hydrosphere– It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc.
Atmosphere– The atmosphere is the thin layer of air that surrounds the earth.
Biosphere– It is a narrow zone of the earth where land, water and air interact with each other to support life.