### independent variable

This is the factor in an experiment that you know before you begin your experiment or the Experimental Variable

### dependent variable

This is the variable in an experiment that you find out by doing the experiment. The result or outcome

### True or False this is a controlled experiment: John wanted to test how fast different batteries ran out of power. He put some batteries in his toys, then he played with them. His radio controlled car batteries failed before his calculator so he concluded those batteries had less power.

False

###
Why is this not a controlled experiment?

John wanted to test how fast different batteries ran out of power. He put some batteries in his toys, then he played with them. His radio controlled car batteries failed before his calculator so he concluded those batteries had less power.

He tested two different toys, each could have used different amounts of batteries, the calculator could use less power. He only tested once. He didn't control his variables.

### What was the relationship we discovered between the capacity of our lifeboats and the passengers it could hold?

The greater the capacity the more passengers it could hold.

### What was the relationship we discovered between distance our foss plane travelled and the passengers (mass) it could carry?

The more passengers (mass) you have the shorter the distance your plane will travel.

### What was the relationship we discovered between the length of our swingers and the amount of swings?

The longer the swinger the fewer the swings. The shorter the swinger the more swings. ( in 15 seconds)

### What was the relationship we discovered between distance our foss plane travelled and the angle of the flight line?

The higher the angle the shorter the distance the plane traveled.

### What changes could you make to our flipper system to make our cork go higher?

Choose the cork with the least mass, put the cork near the end of the flipper, push the flipper stick down all of the way, and push the flipper to the 1 cm mark.

### What changes could you make to our flipper system to make the cork travel farther?

Choose the cork with the least mass, put the cork near the end of the flipper stick, only push the flipper stick down part way, move the flipper to 3 cm mark.

### What were the parts of our flipper (catapult) system?

flipper base, flipper stick, cork,aluminum balls, and measuring tape

### What were the parts of our Foss plane system?

craft sticks, rubber band, propeller, straws, plastic hooks, staples, tape, the flight line.

### What was the relationship between the angle of the flipper base and the distance traveled by the ball?

The higher the angle the farther the ball travelled.

### What can you use to predict the results of an experiment?

A two coordinate graph or another form of a graph.

### How can you tell if you need to retest the outcome of a trial after graphing your data?

The outcome does not match or is too far away from our line of best fit.

### What are the three types of graphes we used during our investigations.

concrete, picture, two coordinate graphs