The water at the surface of a water body gets heated by sunlight. But the water at the bottom does not get heated. The reason is
Very small amount of heat is reaching the bottom through conduction and convection.
Very small amount of heat is reaching the bottom through convection and radiation.
Very small amount of heat is reaching to the bottom through conduction and radiation.
Heat s not reaching at the bottom through conduction, convection and radiation.
What difference between two places make wind possible?
Humidity
Temperature
Pressure
All of these
Which of the following does not belong to the modes of heat transmission?
Conduction
Convection
Radiation
Condensation
The light ray responsible for solar heat.
X-ray
UV ray
Infrared ray
Radio ray
The metal that has more thermal conductivity
Copper
Iron
Aluminium
Zinc
The metal which has the highest thermal expansion.
Mercury
Which is the wrong statement related to a convection?
It takes place in liquids and gases.
Change of position of molecules takes place
Transmission of heat takes place in all Conduction
Transmission of heat takes place only to the deeper direction.
Which among the following is a good conductor?
Silver
The transfer of heat from molecule to molecule, without movement of molecules from one place to another is
conduction
convection
radiation
either of these
The colour that absorbs heat more.
Red
Black
White
Green
