So, for the density of the water to decrease, the volume had to increase. So, the ice expanded out of its container.

From our experiment, we learned that when water molecules go from a liquid to a solid state, they take up more space. Here's a link to a similar experiment.

Water has the unique property of being less dense in a solid state.

particles in water vapour have very high kinetic energy and little or no attractive forces between them.

particles in a liquid move much more freely as the bonds between particles are greatly reduced.

particles in a solid ice cube vibrate very slowly in a fixed position.

As the particles in ice gain heat energy they also gain Kinetic energy. particles vibrate and move around more freely as KE increases.

Carbon Dioxide is an example of sublimation. As a solid, it's dry ice. It transforms straight to a white cloud.

Vaporization is the heat energy required to break the attraction of liquid molecules.

Heat fusion is the heat energy that helps break the molecular bonds.

The boiling point is when a liquid turns from a liquid to a gas.

The volume of something is the amount of space it takes up. Gases, like steam, has definite volume.

Sublimation is the point when a solid goes straight to a gas. It skips it's liquid form.

The boiling point of water is 100 degrees Celsius or 212 degrees Fahrenheit.

Matter is anything that has mass and takes up space.

The melting point and freezing point of ice is the same- 0 degrees Celsius or 32 degrees Fahrenheit.

Ice is water in solid form. Water molecules are packed together tightly.