The heat from the sun reaches us on the earth by the process of:
Conduction
radiation
convection
None of these
Which of the following statement is true?
Metal are bad conductors
In gases, heat is transferred by conduction
In conduction, molecules move from hotter to colder parts transmitting energy
Metals conduct heat better than gases
Which of the following conditions lead to the blowing of sea - breeze in coastal areas?
a. Land cool and sea warmb. Land hot and sea coolc. At Day timed. At Night time
A and B
A and C
B and C
B and D
Convection of heat takes place in:
Metals only
liquids only
gases only
liquids and gases
The expansion of one of the following liquids is used for measuring the temperature in ordinary thermometers. This liquid is:
Alcohol
Water
Glycerol
Mercury
