Olympiad Test: Heat And Temperature -2

metals only

liquids only

gases only

liquids and gases 

are caused by the currents set up in air due to conduction

are caused by the currents set up in air due to convection

are caused by the currents set up in air due to radiation

have no relation to conduction, convection and radiation 

convection current causes trade winds

transmission of heat without actual movement of particles is called conduction

radiation requires medium for heat flow

in convection heat is transferred through movement of fluid 

becomes cold by conduction

becomes cold by convection

becomes cold by radiation

does not become cold 

Good absorbers are good radiators

Shiny surfaces are good reflectors of heat

We wear dark-coloured clothes in summers.

Dark colours are good absorbers of heat. 

flow from water to ball

flow from ball to water

not flow

increase  the temperature of both ball and water. 

 produce electricity

to absorb more light

to prevent heating by radiation

to make it strong 

thermoscope

barometer

kinemoscope

stethoscope 

gaps hold the tracks firmly

gaps give the space to the tracks to expand in summer heat

it is customary to leave the gaps

to produce gentle rhythmic sound when the train moves on the track. 

32ºF

212ºF

100.4ºF

98.6ºF