00:02
Hey there, in this question we have two terms to define.
00:05
The first one is physical change.
00:11
A physical change refers to a change in matter.
00:16
So it's some type of change in matter, but it does not produce a new substance.
00:39
Okay, and we can tell a new substance because a new substance would have a new formula or a different formula.
00:54
So for example, when we freeze water, if we go from water in its liquid state to water in its solid state, it's still h2o.
01:08
So this would be an example of a physical change.
01:15
Cutting up paper or chopping wood are physical changes because we still have the same substance, they're just in smaller portions.
01:27
Okay, and there are also lots of other examples.
01:30
Those are just a couple of examples to give you the idea.
01:33
So physical change is a change in matter that does not produce a new type of matter, a new substance.
01:42
All right, our other thing here that we need to define is a phase change.
01:52
A phase change is a type of physical change.
01:57
So this is going to be under the physical change umbrella...