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Class 10

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Coal and Petroleum

Coal and Petroleum Coal and petroleum are non-renewable natural resources. Coal was formed from the remains of trees buried deep inside the earth some...
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Water Resources: Dams, Water Harvesting

Water Water is a basic necessity for all terrestrial forms of life. Irrigation methods like dams, tanks and canals have been used in various...
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Forests and Wildlife & Movements

Forests and Wildlife Forests are 'Biodiversity hotspots'. Hotspot means an area full of biological diversity. The biodiversity of an area can be measured by determining...
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Natural Resources

Natural Resources Resources provided to us by nature soil, air, water, forests, wildlife, coal and petroleum are used by man for his survival. Types of Resources ...
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Environmental Problems: Depletion of Ozone Layer & Garbage Disposal

Environmental Problems Changes in environment affect us and our activities change the environment around us. Environmental problems caused by humans: depletion of the Ozone Layer...
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Food Chain

Food Chain It is the sequence of living organisms in which one organism consumes another organism for energy. It is unidirectional (single directional). In a...
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Environment & Eco System

Our Environment Environment means everything which surrounds us. It may include living (biotic) and non-living (abiotic) components. Biotic: Plants and animals. Abiotic: Air, water etc. Environment...
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Non-Conventional Sources of Energy: Solar Energy, Tidal Energy, Geothermal Energy & Nuclear Energy

Solar Energy The energy emitted by the sun in form of heat and light is called solar energy. Solar Constant = 1.4 (kJ/s.m2) Outer edge of the...
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Conventional Source of Energy: Fossil Fuels, Hydro-power Plant, Bio Gas & Wind Energy

Fossil Fuels Fuels developed from the fossils. e.g. Coal & Petroleum. Formed over millions of years ago have only limited reserves These are non-renewable source...
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Sources of Energy

Sources of Energy Energy comes in different forms and energy can only be converted from one form to another. For example, if we drop a...