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# Scientific Method

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by

## Diana Whitley

on 7 October 2016

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#### Transcript of Scientific Method

Scientific Method Review
Hypothesis: What is it?
Time to Practice
Variable Practice Worksheets
Testable Question
How do you write a testable question?
Control & Constants
The Control: There is only ONE control.

When doing experiments, it is important to have a comparison (Control).
The control is what normally happens (before the experiment)
IV is the experiment (what changes).
Scientific Method
SM Unit Goal
:
Students will be able to apply SM to perform an experiment.
Scenario #2

DEPENDENT VARIABLES
The part of the experiment that is measured
as a result of the change. This is Data Collection!

*Ask the question: "What am I measuring?"
INDEPENDENT VARIABLES
The part of the experiment that “I” change.

*Ask the question: "What am I changing?"
VARIABLES

What is the independent variable?

Scenario #3

What is the dependent variable?

Scenario #2

What is the independent variable?

Scenario #2

What is the dependent variable?

What is the independent variable?

Scenario #1

Liz tested how high 5 different brands
of new tennis balls would bounce
when dropped from a height of
2 meters. She dropped the ball
so that they hit the same
floor tile each time.

Scenario #3

DEPENDENT VARIABLES
The part of the experiment that is measured as a result of the change.

INDEPENDENT VARIABLES
The part of the experiment that “I” change.

VARIABLES

Michael put 100 red seeds, 100 brown seeds, and 100 yellow seeds in his bird feeder.
He wanted to know which color of seed the birds liked the most. He counted the seeds of each color that remained after 2 days.

Identifying Variables

Scenario #1

Michael put 100 red seeds, 100 brown seeds, and 100 yellow seeds in his bird feeder.
He wanted to know which color of seed the birds liked the most. He counted the seeds of each color that remained after 2 days
Lindsey timed how fast apple slices turned brown after being dipped in different preservatives, such as lemon juice, fruit freshener, and lime soda.
Lindsey timed how fast apple slices turned
brown after being dipped in different
preservatives, such as lemon juice,
fruit freshener, and lime soda.
Liz tested how high 5 different brands of new tennis balls would bounce when dropped from a height of 2 meters. She dropped the ball so that they hit the same floor tile each time.
What is the dependent variable?
Liz tested how high 5 different brands of new tennis balls would bounce when dropped from
a height of 2 meters. She dropped the ball
so that they hit the same floor tile each time.
Scenario #3
What are the Constants in the experiment?
How does the IV affect the DV?
Examples:
How does the amount of rain fall affect the change in temperature in Kansas City?

What is the affect of the temperature on plant growth?

Testable Question
Practice
Writing a hypothesis statement:

If
the IV (state how it changes?),
then
the DV
will
(make a prediction - Increase or Decrease)
Hypothesis
A hypothesis is a possible explanation of your observations including a description of your experiment and a prediction of the outcome.
The Constants: There are several in an experiment!

When doing experiments, it is important to know the constants.
Constants are the things that stay the same during the experiment.

Hypothesis statement is an:
If , then , will
Let's Review!
Hypothesis!
Time to Practice
To Write a Conclusion use: RAS
A = Accept or Refute your Hypothesis
S = Support with data (using numbers)
Like this:
How does the (IV) affect the (DV)?
What is the effect of the (IV) on the (DV)?
Graph Results
Graph: (must include)
Title of graph:
The Effect of (IV) on the (DV)
Label x-axes (IV) & y -axis (DV) and with units
Appropriate scale
Uses correct type of graph
Data Collection:
Title: The effect of (IV) on the (DV)
Label the IV & DV groups
Units of Measurement used
Bar Graph:
A comparison
Line Graph:
Change over time
Example
: The hypothesis, if the type of stain remover is Shout, then the amount of stain removed will increase is accepted. The data supports this hypothesis by showing that 100% of the stain was removed with Shout and only 50% was removed with Stain-out stain remover.
Time to Practice!
Data Table
Data is
information, facts or measurements that describe something.
Data Table
: A table used to organize data to make it easy to read.
Practice Time: Data Table & Graphing!
Writing Procedures: Experiment Design
Use the following guidelines when writing
Start each step with a verb, or action word
Write your procedure so it is clear enough for someone else to use as instructions for repeating your experiment.
Writing Procedures: Experiment Design
Practice Time!
Write up the Procedure on teaching a young child how to Brush their Teeth. (4 minutes)
What is the Control in the experiment?
Michael put 100 red seeds, 100 brown seeds, and 100 yellow seeds in his bird feeder.
He wanted to know which color of seed the birds liked the most. He counted the seeds of each color that remained after 2 days.

Scenario #1
What are some Constants for this experiment?

What is the Control for this experiment?
Lindsey timed how fast apple slices turned brown after being dipped in different preservatives, such as lemon juice, fruit freshener, and lime soda.
What is the Control in this experiment?

What are the Constants in this experiment?
Practice time!
Full transcript