i) Land, water, air, plants, and animals comprise the natural environment.
ii) Lithosphere, atmosphere, hydrosphere and biosphere are the four domains of the natural environment.
iii) The lithosphere is the solid crust or the hard top layer of the earth. It contains landforms like mountains, plateaus, plains, and valleys.
iv) The hydrosphere is the domain of water. It comprises water bodies like rivers, lakes, seas, oceans, etc.
v) The atmosphere is the thin layer of earth that surrounds the earth. It protects us from the harmful rays and scorching heat of the sun.
vi)Biosphere is a narrow zone of the earth where land, water, and air interact with each other to support life.
What is Ecosystem?
Fig: Ecosystem(i) The relation between the living organisms as well as the relation between the organisms and their surrounding form the ecosystem.
(ii) There could be an ecosystem of large rainforest, grassland, desert, mountains, lake, river, ocean, and even a small pond.
(i) Human beings interact with the environment and modify it according to their needs.
(ii) Early humans adapted themselves to their natural surroundings.
(iii) With time, humans learned to grow new things, domesticate animals and lead a settled life.
(iv) The industrial revolution, transportation, and information revolution and information made communication easier and speedy across the world.