Download presentation
Presentation is loading. Please wait.
Published byShanon Woods Modified over 9 years ago
1
Intro to lab design and terms
2
We are going to have a contest. But how will we know which is best? Which would be the most difficult to measure? Why? Which would be the least difficult to measure? Why? Lets try it out! Make a paper airplane and write your name on it
3
You can use scissors, paper clips, tape, staples or any other material available. Make a guess as to what effect this change will have on your plane. (What do you think will happen to the airplane with these changes….Hopefully fly further) Lets go try it again and see if you are correct.
4
Hypothesis - an educated guess as to what will happen in an experiment. If actual outcome is known, then it is really not a hypothesis.
5
Was it fair to only have one throw for the winner? Why or Why not?
6
Repeated trials - it reduces the effects of error or chance on the overall results. How many times do you think would be good to test in labs?
7
Refold? Add paper clips? Add tape? Anything else?
8
Wing shape Shorter body? Moved the center of gravity? Changed the weight of the plane? Anything else? Did you change more than one thing?
9
If you made more than one change, which change affected it the most? DO YOU HAVE PROOF? The independent variable - ONE PURPOSEFULL CHANGE that effects the desired outcome (or dependent variable)
10
Flight time Total distance Path it traveled Anything else?
11
A RESPONSE TO CHANGE (THIS IS WHAT CHANGED BECAUSE OF INDEPENDENT VARIABLE.)
12
Size of paper Texture of paper Weight of paper Color of paper Shape of wings Anything else
13
The things that remained the same.
14
How do you know if the thing you changed (independent variable) was the thing that actually made it change? You must fly one unmodified plane in each trial to see if its flight remained the same.
15
A control is what every other trial is compared against. The first plane we threw was the control because we compared all the rest of the throws to it.
16
Brainstorm ideas - develop a purpose for the experiment What will you keep the same? - constants What will you change? - IV (Independent Variable) What do you think will change because of it? - DV (Dependent Variable) What will you use to compare the results? Control
17
How do you know what happened in the experiment was not a fluke? Repeated trials – good to have at least 3 but 5 is better. What do you think will happen? Hypothesis – Please write in the form of If…IV, then…..DV
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.