HOTS QUESTIONS
Q.1 Find out why the layer of petroleum and gas is found above that of water deep inside
the earth's crust.
Q.2 Why is burning of fossil fuels linked to global warming?
Q.3 All renewable resources are inexhaustible. Do you agree? Give reasons.
Q.4 All combustible substances are not fuels. Why?
Q.5 Why do we feel the need for conservation of resources more today than are ancestors
did?
Q.6 List five things that you can do to help in preventing an energy crisis.
Answers
Answer:
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Explanation:
1)It's so because petroleum is a oily substance and oil being lighter floats above the water as oil is less dense than water. Same goes on with natural gas as air or gas being lighter rises upwards and so layer of petroleum and natural gas are found above that of water deep inside earth's crust.
2)When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, causing global warming.
3)Yes, I do agree as all renewable resources are inexhaustible because they are present in unlimited quantity in nature and are not likely to be exhausted by human activities. eg: air, sunlight
4)A combustible substance is the one which can burn. ... It does not necessarily mean that it would produce large amount of heat without leaving any residue. Thus all fuels are combustible but not all combustible substances are fuels
5)We feel a greater need for conservation as,we are facing lot of risk than our ancestors. Nowadays we are wasting so much of resources than our ancestors. ... We need to conserve resources because it is the main source of our daily needs. Remember the 3 R's- reduce, reuse and recycle.
6) Five things that we can do to help in preventing an energy crisis are:-
1-Using room coolers, air conditioners, geysers, etc., only when needed.
2-Reducing the flame of the burners while cooking to save fuel.
3-Using CFLs and tube lights, which use less energy, instead of bulbs
Answer:
The answer is :
Explanation:
1)It is called petroleum because it is found under the crust of Earth trapped in rocks. It occurs deep under the surface of Earth between two layer of impervious rocks. It is lighter than water, so it floats over water and so it is found above water.
2)As as fossil fuels contain large amount of carbon atom so when we burn the Fossil fuelit result in large amount of carbon dioxide which leads to greenhouse gases result in greenhouse effect and hence global warming.
3)All renewable resources are inexhaustible because they are present in unlimited quantity in nature and are not likely to be exhausted by human activities. eg: air, sunlight.
4)A combustible substance is the one which can burn. It does notnecessarily mean that it would produce large amount of heat without leaving any residue. Thus all fuels arecombustible but not all combustible substances are fuels.
5) and 6) you do your own
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Hope it helped you