00:02
When we are designing an experiment, we are starting with an observation that we turn into a hypothesis.
00:09
So maybe i observe that there's this effect that happens, so i hypothesize this thing causes the effect.
00:19
So that's how you're going to write your hypothesis.
00:21
This causes this, right? and so we do that because you want those two distinct pieces.
00:28
So the cause, whatever you believe is causing what you see, is going to be called your independent variable.
00:37
And then whatever you are observing to happen is going to be your dependent variable.
00:47
So i'll show you an example to help this make sense.
00:50
Say if you had snails that you were putting underwater and you saw oxygen or carbon dioxide bubbles that were being produced in this underwater little aquarium.
01:05
You might say, i think that the snails are causing the carbon dioxide.
01:10
So we have a cause, which are the snails, and we have an effect, the co2 bubbles.
01:19
So i would have the number of snails, you know, how many snails are in your container as your independent variable...