Class 7 Unit-7 (Energy in Daily Life)
Unit-7 (Energy in Daily Life) Introduction Energy is the capacity of doing work. There are different forms of energy. Renewable and non-renewable sources of energy 1. Nonrenewable sources of energy -Non-renewable resources are the energy that can be used only once and cannot be made again quickly . -Once they are finished, they take millions of years to form again. -Energy obtained from non-renewable sources is called non-renewable energy. -For example: Natural gas, petroleum, coal, nuclear energy. 2. Renewable sources of energy -Renewable natural resources are the energy that can be used again and again. They do not run out easily because nature replaces them in a short time. -Energy obtained from non-renewable sources is called renewable energy. -For example: Solar energy, wind energy, hydroelectricity, geothermal energy, wood, biomass. Fossil Fuels Fossil fuels are ...
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