Why is ice less dense than water?
A. When water freezes, it forms a crystal structure with less volume than liquid water.
B. Ice crystallizes with an open structure, and the gaps that form between the water molecules in ice increase its volume.
C. Water molecules slow their vibrations and move closer together when water freezes.
D. Some water molecules are lost when water freezes.

Your answer is number A.

Why is it that

When water freezes, water molecules form a crystalline structure maintained by hydrogen bonding. Solid water, or ice, is less dense than liquid water.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.