PASS YOUR MOUSE OVER THE QUESTION MARKS (???) FOR THE ANSWER TO EACH QUESTION! ANSWER WINDOW WILL OPEN. JUST CLICK OK TO MAKE THE ANSWER GO AWAY AND GO ON TO THE NEXT QUESTION!

1. In case of heavy water, oxygen combines with.....?

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2. A special type of hydrogen with an extra neutron in its nucleus is........?

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3. Heavy water can be extracted from ordinary water by the process of.....?

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4. In every water molecule, there are ........ hydrogen atoms and ........ oxygen atoms.?

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5. Water expands when it is?

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6. Oxygen condenses at a temperature of.......?

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7. The ultimate source of nearly all our energy is the.....?

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8. Solar cells turn light energy from the sun into?

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9. Two types of basic energy is ...... and .......?

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10.Energy that is not doing anything but is simply stored for action is called......?

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11. Energy in the nucleus of an atom is called.....?

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12.The energy that something has because it is moving is called.....?

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13.As per the Law of Conservation of Energy, energy can neither be ..... nor ......?

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14.The word kinetic comes from the Greek word kine, which means......?

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15. In all energy conversions, heat is produced as.......?

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16.Coal, Oil, natural gas, etc. are known as........?

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17. At the present rate of consumption of coal, it is estimated that it will last about..........years.?

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18.At the present rate of consumption of oil, it is estimated that it will last for about ...... years?

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19.Nuclear energy is released by a process called........?

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20.It is estimated that nuclear power stations are presently producing about ...... percent of world's electricity?

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