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General Science for Class 7
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Energy Resources
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Energy Resources
The products which are helpful in harnessing solar energy, are
solar furnaces
solar heaters
solar cells
all of above
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Energy Resources
Fossils fuel is an important source of energy for
transport
homes
industries
all of them
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Energy Resources
Types of fuel include
kerosene
charcoal
firewood
all of above
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Energy Resources
Toxic air pollutants like sulphur dioxide and nitrogen oxides are produced by burning
coal
oil
gases
both a and b
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Energy Resources
Green plants provide food for other
plants
living things
non living things
trees
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Energy Resources
1 kilo joule is equal to
100J
1000J
10J
0.1J
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Energy Resources
Almost every resource of earth’s energy can be traced back to
sun
moon
earth
plants
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Energy Resources
The floating devices which are connected to chain for generation of electricity are called
salter gooses
salter ducks
salter mines
salter seagulls
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Energy Resources
The energy resources which would not run out are called
renewable
non renewable
original
escapable
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Energy Resources
Earth emits heat by eruptions of
volcano
hot springs
geysers
all of them
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