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How Does a Convection Heater Work?

Important Questions on Energy

EASY
Science>Physics>Energy>Thermal Convection
Air is a bad conductor of heat, still vacuum is preferred between the walls of the thermos flask because
MEDIUM
Science>Physics>Energy>Thermal Convection
What is the principle of a hot-air balloon?
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Science>Physics>Energy>Thermal Convection
Why are ventilators in houses provided at the top of walls?
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Science>Physics>Energy>Thermal Convection
The climate of the place is affected by its distance from the sea.
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Science>Physics>Energy>Thermal Convection
While doing an experiment on plotting the temperature-time graph of hot water as it cools, we can get a good graph:
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Science>Physics>Energy>Thermal Convection
Ventilators are made in the upper part of the rooms. Why?
EASY
Science>Physics>Energy>Thermal Convection
The layers of atmosphere are heated through
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Science>Physics>Energy>Thermal Convection
The convection currents in air transfer heat:
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Science>Physics>Energy>Thermal Convection
What kind of heat transfer is shown in these pictures?
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Science>Physics>Energy>Thermal Convection
In a room it is best to place a room heater on the floor but an air conditioner near the ceiling. Why?
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Science>Physics>Energy>Thermal Convection
Why the freezers are placed at the top of the refrigerators? 
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Science>Physics>Energy>Thermal Convection
Sea and land breezes :
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Science>Physics>Energy>Thermal Convection

Why are freezers placed in the top part of the refrigerator?

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Science>Physics>Energy>Thermal Convection

In convection currents, hot air moves

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Science>Physics>Energy>Thermal Convection
 Why are convection currents seen in liquids and gases, and not in solids?
HARD
Science>Physics>Energy>Thermal Convection
Explain how all the air in a room gets heated when a room heater kept on the floor in a corner of the room is switched on. Draw a labelled diagram to illustrate your answer. 
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Science>Physics>Energy>Thermal Convection
Why is a room heater placed near the floor and an air conditioner near the ceiling?
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Science>Physics>Energy>Thermal Convection
Which of these heats up faster?
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Science>Physics>Energy>Thermal Convection
Land breeze and sea breeze are set up in coastal areas because of
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Science>Physics>Energy>Thermal Convection
Room heaters work on the principle of _____.