this unit is unit 1.5 where we're going to discuss a hypothesis statements so this hopefully is a review and so hypothesis statement is a statement that's part of the scientific method so when we observe something and you formulate a question the hypothesis statement is something that is a testable way of stating whether or not something is true or not so we can actually formulate a test from the hypothesis statement all right so the hypothesis has the form of what we think will happen it's a prediction okay it's a prediction all right and it is a in the form of an if and then statement so if we do something then something we think we think something is going to happen so that allows us to test it so we can change something and then observe the results okay for an example let's use our elephant toothpaste okay so if we reduce the size of the bottle that we are conducting a reaction in then the elephants elephants toothpaste will go higher the reaction will go higher so the hypothesis statement includes both our independent and our dependent variables for our experiment our independent variable is the variable that we change in the lab okay so for that one it would be US changing the size of the bottle and our dependent variable is how the experiment changes or what we observe and it is what is measured in the lab so our hypothesis statement has the form of if we do something with our independent variable if we change it somehow then we will observe a change in our dependent variable okay so that's how you can identify them it will always be if we change our independent variable then we observe a change in our dependent variable let's look at our elephant toothpaste example again so if we reduce the size of the bottle then the elephant's toothpaste will go higher all right so if we reduce the size right so that's going to be our independent variable it's going to be the size of the bottle all right then the elephant's toothpaste will go higher so our dependent variable is going to be the height of the elephant toothpaste and we can measure that several different elephant toothpaste we can measure that several different ways right we could measure it like maybe by taking a picture we could compare it to some other thing or we could measure it with a ruler right so let's look at another example so for this we're going to have to go out here because iPad does not let me play videos all right so let's look this is a post you guys maybe have seen this video before that this is a really this is what a cramp looks like awful oh my God I won't stop okay so that's a super bad vessel cramp now I know that many of you play football and probably have had muscle cramps like this or just you know from life right so they they're caused by some sort of imbalance either in hydration or in um in uh are the electrolytes in our body which are just like the salts so let's look at this so I I know many of uh I've heard before that the coaches like to use pickle juice to help with muscle cramps right so if we take pickle juice what do we think if we take pickle juice okay if we take pickled juice all right and then we won't get cramps all right so for this example what would be our independent variable so remember that's the one that we take so that would be the dose of pickle juice so that's what we are changing and then we are hoping our dependent variable would be the frequency of our cramps so hopefully we will not get cramps so that would be an example of the independent and the dependent variable and our hypothesis statement we are looking at having pickle juice and getting a reduced number of grams all right and then this this we will do we're going to do a practice a couple more in class so that's the next section that we will be doing in class