Question # 1

Land and Sea breezes are the results of:

Choose an answer

Conduction

Convection

Radiation

Conduction and radiation

Convention is done by ____________

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Vibration of atoms

Actual movement of particles

Same as conduction

Nil

On hot days cold air from sea began to move towards land:

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Sea breeze

Land breeze

Both A and B

None of these

Which surface is best reflector of heat?

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dull black surface

coloured surface

white surface

shining slivered surface

____________ is bad conductors of heat:

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Copper

Water

Wire

Nil

Convection of heat is a process of heat transfer due to;

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Random motion of molecules

Downward motion of molecules

Upward motion of molecules

Free motion of molecules

At night , the air from land to begins towards sea called:

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Land breeze

Sea breaze

Both A and B

Radiation

Leslie's cube is filled with:

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Cold water

Hot water

Mercury

Air

Larger is the area greater will be:

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Radiation

Transfer of heat

Evaporation

Conduction of heat

____________ from sun are major source of energy on earth.

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Light

Radiation

Both a & b

None of these

False ceiling is done to

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Lower the height of ceiling

Keep the roof clean

Cool the room

Insulate the ceiling

Those objects which do not conduct electricity are called.

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Insulator

Semi conductor

Nil

Conduct

The brids stretch out their wings and circle in the rising currents of hot air called

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conduction

convection

radiation

thermals

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