Question 2 Which Change of state involves particles losing energy, and moving closer? A. Gas to liquid B. Liquid to Solid C. Solid to Liquid D. Liquid to Gas

## Step 1<br />The problem is asking us to identify the change of state where particles lose energy and move closer together. This is a characteristic of a phase transition where a substance changes from a less dense state to a more dense state.<br /><br />## Step 2<br />Looking at the options, we can eliminate options A and D because they involve a substance changing from a gas to a liquid or a liquid to a gas. In these cases, the particles are gaining energy and moving further apart, not closer.<br /><br />## Step 3<br />Option C, which is a solid to a liquid, also involves particles gaining energy and moving further apart. This is because the particles in a solid are already close together, and when they gain energy, they move further apart to form a liquid.<br /><br />## Step 4<br />Option B, which is a liquid to a solid, involves particles losing energy and moving closer together. This is because the particles in a liquid are already close together, and when they lose energy, they move closer together to form a solid.