Important Notes On 7th Geography Chapter 1
The place, people, things and nature that surround any living organism is called environment. It is a combination of natural and human made phenomena. While the natural environment refers to both biotic and abiotic conditions existing on the earth, human environment reveals the activities, creations and interactions among human beings.
The domain of water is referred to as hydrosphere. It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc. It is essential for all living organisms.
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 is an irregular surface with various landforms such as mountains, plateaus, plains, valleys, etc.
Landforms are found over the continents and also on the ocean floors.
The atmosphere is the thin layer of air that surrounds the earth. The gravitational force of the earth holds the atmosphere around it. It protects us from the harmful rays and scorching heat of the sun. It consists of a number of gases, dust and water vapour. The changes in the atmosphere produce changes in the weather and climate.
Plant and animal kingdom together make 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.
All plants, animals and human beings depend on their immediate surroundings. Often they are also interdependent on each other. This relation between the living organisms, as well as the relation between the organisms and their surroundings form an ecosystem. There could be an ecosystem of large rain forest, grassland, desert, mountains, lake, river, ocean and even a small pond.
Class 7 Social Science – Geography Chapter 1 – Important Questions
Natural Components like, Land (Lithosphere), Water (Hydrosphere), Air (Atmosphere), Living things (Organism).
Human made Components like, buildings, parks, bridge, road, industries etc.
Humans like, individuals, family, community, religion, politics, education etc.
buildings,
parks,
bridge,
road,
industries etc.
He uses water.
Deforestation by which he clears land for agriculture, industries and habitation.
He tills land for agriculture.
He uses air.
Numerous activities made to make the life comfortable.
Plants provide food to animals.
Forests provide shelter to wild life.
Wildlife adds beauty to forests.
Animal dung provides manure for the growth of plants.
The decay of dead animals provides nutrition to soil which in turn helps in the growth of plants and trees.