00:01
Okay, so here i want to determine which of these represents a chemical change, and we're given two diagrams.
00:08
So in our first diagram, we can see that we have a few molecules pretty tightly packed together down here at the bottom, and it looks like they all have two red atoms and two white atoms.
00:37
And so that tells us that this is a specific type of molecule.
00:40
Two red and two white means it's one specific type of atom, and what happens is that when this just transforms into the next box, we see that the compounds, or the molecules, look the same.
00:56
They still have two red and two white, but now they're a bit more spread out.
01:02
And so what seems to be happening here is that we have molecules that are all tightly packed together, where versus the same molecules are now more spread out.
01:14
That indicates that a physical change is happening.
01:20
And so this is because we see that the molecules are still the same...