The states of 1_______________ are solid, liquid and gas. A 2_____________

change occurs whenever a substance changes from one state of matter to another. Phase

change can be caused by a change in pressure or 3________________. If heat is applied to

cause a phase change, the process is identified to be 4________________ and

5____________ if heat is removed. Melting is a process when solid changes to 6________

as heat is removed. When this happens, it has reached its 7_____________ which is equal

to 0 OC. On the contrary, matter reach its 8_____________point when liquid changes to

solid as heat is released. If liquid matter changes to gas, we observe 9____________ every

time we boil water. And if heat is removed, especially when the container is covered,

10______________ are observed under the cover, evidence that the water

11________________.

There are other processes of phase change that makes one state of matter change

directly to another state without passing their pre-requisite state. This includes the

12______________ process wherein solid changes to gas without passing its liquid state.

Example of this phase change includes 13________________. The reverse of this process

is 14______________ wherein gas changes directly to solid. This process is responsible for

the formation of 15___________ in colder areas​