experimental design
Download
Skip this Video
Download Presentation
Experimental Design

Loading in 2 Seconds...

play fullscreen
1 / 16

Experimental Design - PowerPoint PPT Presentation


  • 55 Views
  • Uploaded on

Experimental Design. ????????????????????????????. What’s the question. Hypothesis. If-then statement If part - shows a relationship (can be cause-effect) Then part – is your prediction

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Experimental Design' - trenton-dempsey


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2
????????????????????????????
  • What’s the question
hypothesis
Hypothesis
  • If-then statement
  • If part - shows a relationship (can be cause-effect)
  • Then part – is your prediction
    • If the texture/pattern of a paper towel affects the rate at which it picks up water, then a paper towel with more indentations and therefore surface area will pick up water the fastest.
slide4
An experiment needs:
  • To test only one variable
  • All other variables are constant
  • Example: To test which fertilizer is the most effective, the variable is the type of fertilizer.
  • What should you keep constant?
an experiment needs
An experiment needs:
  • Control Group – Where all factors are standard or kept the same. This is what you will compare your experimental group to
  • Experimental (Variable) Group – All conditions are kept constant EXCEPT for the variable
experiment
Experiment

A

B

D

C

What group is the control group?

an experiment needs1
An experiment needs:
  • Independent (Manipulated) Variable – The factor that you deliberately change (fertilizer)
  • Dependent (Responding) Variable – The factor that changes in response to the manipulated variable (plant growth)
experiment1
Experiment

A

B

D

C

What group is the control group?

slide9
An experiment needs:
  • Data- the more trials or the larger the sample size, the more reliable your data will be.
        • Quantitative- numerical data
        • Qualitative- descriptive data
  • Your data will need to be organized so that the result is clear.
data collections
Data Collections

Graduated Cylinder

Beaker Test Tube Pipette

Which is the most precise?

slide11
Accuracy - the ability of a measurement to match the actual quantity being measured
    • The true value
  • Precision – the ability of a measurement to be consistently repeated
an experiment needs2
An experiment needs…
  • Conclusions- your experimental results need to be communicated to
slide14
Hypothesis- the prediction and the thinking behind your prediction
    • For example: Fertilizer A will be the most effective in aiding plant growth because it contains the most nutrients.
  • Theory- after many hypotheses have been tested and have not been proven incorrect, the hypotheses will become a part of a theory.
slide15
Theory-
    • How have you heard this word used in “the real world”?
    • Why is it important that we know the scientific definition?
ad