Question

mary and ron are discussing the properties of water. mary says that when water freezes, it becomes less dense than liquid water. ron says it becomes more dense. who is correct and why? mary, because lakes and ponds freeze at the bottom first mary, because ice molecules are larger than liquid water molecules ron, because ice sinks in liquid water ron, because ice molecules are smaller than liquid water molecules

Explanation:

When water freezes into ice, hydrogen - bonding causes the water molecules to form a more open, hexagonal lattice structure. This increases the volume of the ice for a given mass of water, making ice less dense than liquid water. Lakes and ponds freeze from the top down because ice floats on liquid water. The size of ice and liquid - water molecules is the same.

Answer:

Mary is correct because when water freezes, it becomes less dense than liquid water. Ice floats on liquid water, so lakes and ponds freeze at the top first.