Question

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Answer 1

Answer:

I: Solar energy is a renewable resource of energy as it can be used to produce electricity as long as the Sun exists. While thermal power is no-renewable source of energy because coal is used to generate electricity. 2) Solar energy is an alternative for fossil fuels as it is non-polluting and clean source of energy.

2:As water is heavier than petrol therefore slips down permitting the petrol to rise to the surface and continue to burn. Besides, the existing temperature is so high that the water poured on the fire evaporates even before it can extinguisher the fire. ... Thus the petrol fire cannot be extinguished by water.

3:carbon monoxide emission is reduced by about 80% in CNG-powered cars compared to gasoline-powered vehicles. CNG also produces 45% less hydrocarbons than gasoline. And although natural gas also produces greenhouse gases, it is considerably reduced compared to gasoline or diesel.

4:Coal is called a fossil fuel because it was made from plants that were once alive! Since coal comes from plants, and plants get their energy from the sun, the energy in coal also came from the sun. ... Over millions of years, the plants were buried under water and dirt. Heat and pressure turned the dead plants into coal.

Explanation:

I hope it will help you,................

Answer 2

Answer:

i) yes solar energy is better than thermal energy because Solar energy is a renewable resource of energy as it can be used to produce electricity as long as the Sun exists. While thermal power is no-renewable source of energy because coal is used to generate electricity.

ii) water should not be thrown over a fire caused by petrol because they are lighter than water so they continues to float over water hence continues to burn. So rather than controlling the fire it will spread the fire.iii) yes because Compressed natural gas is a clean-burning fuel. ... CNG also produces 45% less hydrocarbons than gasoline. And although natural gas also produces greenhouse gases, it is considerably reduced compared to gasoline or diese.

iv)Coal is called a fossil fuel because it was made from plants that were once alive! Since coal comes from plants, and plants get their energy from the sun, the energy in coal also came from the sun. The coal we use today took millions of years to form. ... Heat and pressure turned the dead plants into coal..