00:01
To answer a question scientifically, then you're going to have to go through the process of observation, experimentation, things like that.
00:07
So we're going to build a hypothesis experiment control based on what we know.
00:13
So first off, what you want to do is build a hypothesis, which is essentially just something that is measurable and is a relationship of two things.
00:36
So i'm going to use an example for this to make it make sense.
00:40
So an example of a hypothesis might be that you believe adding fertilizer to plants will increase their growth.
01:00
So there's two variables here and this is a measurable thing.
01:06
That's very important.
01:07
So the measurable aspect of this is the plant growth.
01:11
It's very easy to measure plant growth.
01:14
You know, you can use a ruler.
01:15
You can determine if you want to do height or width, but overall you can have numbers that are easily measurable and repeatable.
01:24
Now, the relationship of two variables is distinct because we are looking at what's called an independent variable versus a dependent variable.
01:33
So you think that adding fertilizer is going to change the way plant behaves.
01:38
So your addition of fertilizer, what you choose to do is called the independent variable.
01:48
And what you expect to have to happen, as a result, what you're going to be measuring is your dependent variable.
01:59
And so when you graph your results, when you talk about your results, you're going to refer to this independent and dependent variable a lot.
02:05
Now, the purpose of a hypothesis is to state what you expect to happen...
