Question

What must be added to water for it to boil?
A. stirring
B. more water
C. salt
D. heat energy

Answer 1

You have to add heat to water to make it hot enough to boil, boiling happens when water gets really hot.

Answer 2

Ｄ

Answer 3

D

Answer 4

D this is a change in energy and you must have heat to boil water you can't have cold water boiling

Answer 5

D

Answer 6

when your mom boils food in water it is on the stove and a stove is hot.

Answer 7

Water boiling=change from liquid to gas
As you can see from this diagram I found on the internet, energy is needed to transform water (liquid) to steam (gas)--in the process known as boiling :)
So yea, heat energy is required for water to boil :)