7. Condensation occurs when (A) A liquid is cooled (B) A gas is cooled (C) A liquid is heated (D) A gas is heated

## Step 1<br />Condensation is a physical process where a gas changes its state to a liquid. This process usually happens when a gas is cooled down.<br /><br />## Step 2<br />When a gas is cooled, the kinetic energy of the gas particles decreases. This means that the particles slow down and come closer together.<br /><br />## Step 3<br />As the gas particles come closer together, they form a liquid state. This is the process of condensation.