Which of the following helps to make the houses cool?
sand
clay
wood
grass
Heat transfer from one place to another is
conduction
convection
radiation
transmission
Wood, coal are the
sources
heat
sources of heat
effects of heat
To observe solar ellipse people uses
naked eye
power glasses
black glasses
none of these
Light can partially pass through
opaque substance
transparent substance
translucent substance
Light emitters are called
light
emitter
sources of light
Transmission of heat is not possible through
iron
copper
aluminium
Light cannot pass through
liquids
Which helps in the manufacture of utensils ?
plastic
In how many ways heat flow ?
1
2
3
4
