What do these two changes have in common? firing a clay pot in a hot kiln burning food on a stove Select all that apply. Both are only physical changes. Both are caused by cooling. Both are chemical changes. Both conserve mass.

## Step 1<br />The problem involves understanding the nature of two processes: firing a clay pot in a hot kiln and burning food on a stove. We need to identify the commonalities between these two processes.<br /><br />## Step 2<br />The first option states that both processes are only physical changes. However, this is not accurate. Firing a clay pot in a hot kiln and burning food on a stove both involve chemical changes. The clay pot undergoes a process called vitrification, where the clay particles to form a solid mass. This is a chemical change. Similarly, when food is burned, it undergoes a chemical reaction known as combustion, where the food reacts with oxygen to produce heat, light, and new substances. This is also a chemical change.<br /><br />## Step 3<br />The second option suggests that both processes are caused by cooling. This is not true. Both processes involve heating, not cooling. The clay pot is heated in a kiln, and the food is burned on a stove, both of which involve heating.<br /><br />## Step 4<br />The third option states that both processes are chemical changes. This is true. As explained in step 2, both processes involve chemical changes.<br /><br />## Step 5<br />The fourth option suggests that both processes conserve mass. This is true. According to the law of conservation of mass, the total mass of the substances involved in a chemical reaction remains constant. In both processes, the mass of the clay pot and the food remains constant, even though their physical and chemical properties change.