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WorksheetsConduction,Convection and Radiation
Total questions: 16
Worksheet time: 15mins
Convection can take place in solids.
True
False
Which process is going on in the picture?
Convection currents in water.
Water is getting dark as there some impurities down there
My mother is boiling water for her tea
What is convection?
It's a mode of transfer of heat in fluids wherein the molecules actually move from one part of the fluid to another of the fluid to others.
It's a mode of transfer of heat in solids wherein the molecules actually don't move from one part of the solid to others.
Substances which allow heat to flow through them easily are
(a)
How does Radiation or radiant energy travel?
It travels in straight line in the form of waves.
It travels in curved lines in form of waves.
It travels in an auto.
Arrange the following with reference to their meanings.
Column A
1)- Radiation-
2)- Conduction-
3)- Convection-
Column B
a)- Directly without using any medium.
b)- By actual movement of molecules in fluids.
c)- From one molecule to another in a solid.
1)- Radiation- By actual movement of molecules in fluids.
2)- Conduction- Directly without using any medium.
3)- Convection- From one molecule to another in a solid.
1)- Radiation- Directly without using any medium.
2)- Conduction- By actual movement of molecules in fluids.
3)- Convection- From one molecule to another in a solid.
1)- Radiation- Directly without using any medium.
2)- Conduction- From one molecule to another in a solid.
3)- Convection- By actual movement of molecules in fluids.
Choose the correct statement.
Almost all cold objects radiate heat.
There isn't any object which radiates heat.
Almost all hot objects radiate heat.
Objects having ________________are____________of radiant heat.
bright or white colour ; good conductors
dull or black color ; good conductors
Handles of cooking vessels are made of ___________
GOOD CONDUCTORS OF HEAT.
BAD CONDUCTORS OF HEAT.
SELECT THE CORRECT STATEMENT.
WHEN A SOLID IS HEATED, THE MOLECULES OF THE SOLID IN CONTACT WITH THE SOURCE OF HEAT START VIBRATING FASTER.
WHEN A SOLID IS HEATED, THE MOLECULES OF THE SOLID IN CONTACT WITH THE SOURCE OF HEAT START VIBRATING SLOWER THAN USUAL.
WHEN A SOLID IS HEATED, THE MOLECULES OF THE SOLID IN CONTACT WITH THE SOURCE OF HEAT DON'T EXPERIENCE ANY CHANGE AND VIBRATE NORMALLY.
Convert 27°C into
°K
°F
80°F
300.15°K
72°F
120°K
45.17°F
220.18°K
Chimneys are fitted in factories to_______
Get heat as it is very cold in factories.
Get air as it is very suffocated in factories.
to get rid of undesirable smoke and fumes.
to transfer some useful material in and out of the factory.
Ice melts into water on heating at_________
110°K
0°C
100°F
Can Ice even melt?
What Is Thermal Expansion?
(a)
GIVE REASON:-
Gaps are left between successive railway tracks.
It is so because the government isn't working nicely.
It is done so that in future if people want to repair or alter it.......It is easy to do the needful.
It is to allow them to expand during summer.
Rupali being a science student is needed to convert temperatures from one scale to another. So can you help her to do some of these:-
i) 50°F to °K
ii) 278°C to °F
i) 283.15 °K
ii) 5°F
i) 28 °K
ii) 78 °F
