Answer:
I notice your question is incomplete, but I guess it corresponds to the one I attached as an image. I will answer to that question and I hope it helps:
The three water phases: solid (ice) , Liquid (water), Gas (vapor)
1) The state of matter in which water is densest - Liquid
2) The state of matter in which molecules are most energetic - Gas
3) The state of matter of steam rising from a hot cup of coffee - Gas
4) The state of matter in which water molecules vibrate about fixed location - solid
5) The state of matter of frost on grass - solid
Explanation:
1) The state of matter in which water is densest - Liquid
When water freezes, its molecules are structured as a very organized web of water molecules bonded by hydrogen bonds. This lattice structure makes Ice less dense than liquid water. In fact, in liquid water, hydrogen bonds unify water molecules, but not in a organized and clear structure, so molecules are nearer than in solid state, they are tightly packed.
2) The state of matter in which molecules are most energetic - Gas
Gas is the state in which molecules are most energetic because they move freely. Ice has water molecules in a specific structure (lattice) avoiding them to move freely and all over a container, so no movements means no action and a low energy. Water moleule in liquid state has some movement but not as free as gas state. Gas has a variable volume and shape, its particles are far from each other and they are not in a fixed place, so there is a lot of movement, so a lot of energy.
3) The state of matter of steam rising from a hot cup of coffee - Gas
The state of matter of water rising from a hot cup of coffee is vapor and is invisible; as it began to condence, we can see droplets that form a mist.
4) The state of matter in which water molecules vibrate about fixed location - solid
As I explained before, ice is the state in which water molecules are in a lattice-like fixed location. These molecules still vibrate but in a fixed point.
5) The state of matter of frost on grass - solid
Frost on grass is the result of water depositions that lose thermal energy and they become a thin layer of solid water.
