Why does ice make that cracking sound when it goes into hot water

Question

i was gonna make some iced tea, but the water was hot. so i put some ice in it (before i put the iced tea mix) and it made the cracking noise (which i hate!) and i wanted to know why ice does that.

thanks!!

Answer 1

the hot water is breaking the ice, and I love that noise

Answer 2

Because the density of the molecules is rapidly expanding (i.e. the ice is "growing" as a part of the melting process), which causes the ice to crack.

Answer 3

Because the hot water is breaking the ice.  

Answer 4

Thermal shock.  The cold makes the ice contract and the heat makes it expand, so you get that cracking sound when the cold ice hits the hot liquid.  

Answer 5

its expanding

Answer 6

Beats me. :)

Answer 7

When water freezes, it contracts.  When it thaws, it expands. As ice expands, it stresses which causes the ice to crack.  The sounds of these cracks are transmitted through the ice.  The faster the ice is thawed, the greater the stress and hence more rapid and seemingly loud the cracking.  So if you melt ice quickly (like in a glass of hot water) then you will get that enthusiastic cracking noise you enjoy so much!  : )

Answer 8

because the hot water and ur  putting cold in the hot water. it's like different element.

Answer 9

Thermal expansion induces stress fractures.

Answer 10

The molecules are beginning to vibrate and spread faster in the ice as it forms into a hot liquid state again.

Answer 11

air is trapped in water when it freezes - heating this air causes it to expand - voila! - cracking ice...!

Answer 12

because ice has holes and hot water enters and makes the sound

Answer 13

the tempature change

Answer 14

The ice expanding and breaking