why does milk moves upwards on boiling.?

Answer 1

Water or milk does the same thing on boiling. It's heated at the bottom by the burner, and rises to the top, creating a circular motion. It is probably more visible with milk. By the way, most of what makes milk a liquid, is water

Answer 2

i think i got the answer JUST KEEP READING N U'LL GET IT
In the
case of milk, the molecule involved is casein (Word derived from the latin
term for "cheese"). Milk is an watery emulsion in which very small fat
droplets are coated by casein in a way that protects them from flowing
together (coalescing). On heating, this subtle architecture is destroyed:
At a certain temperature, even below boiling point of water, protein
molecules generally are irreversibly changed in their spatial arrangement
("denatured"). Casein, together with other components, thereby forms a
tough film which surrounds the water vapour bubbles of boiling milk,
preventing them from breaking (The milk does NOT reach boiling point
faster than water). This has the effect that the milk is transformed into
a RELATIVELY STABLE FOAM, WHICH OCCUPIES A MUCH LARGER VOLUME THAN THE ORIGINAL LIQUID
. Expansion continues a little while after removing it from
the hotplate because of the heat stored in the pan.

Answer 3

You know that milk is a colloid and when it gets heated, a layer of emulsion is formed. Now on boiling it, the layer of emulsion acts as a barrier for mi;lk vapours. This causes the movement of milk upwards.

Answer 4

Convection currents

Some is going up, but some is going down, too. The hot milk rises, the cool milk falls and hits the burner again, heats up and rises. The cycle repeats.

Answer 5

milk

Answer 6

this is because of the air in the milk which expands on heating and escapes.

Answer 7

Trapped air and surface tension.

Answer 8

duh!!!!!!!!!!!!!!!!!! b'coz it cant go down
assume ur sittin' on fire will u get up or just say thatway