BELLRINGER 8/27/14
On page 2 of your INB, identify the following elements of the
experiment you did yesterday:
1. Purpose
2. At least one variable
3. At least one constant
Scientific Method Notes
Put on page 7 of your INB
Purpose/Question – The reason a scientist conducts an experiment.
The question a scientist hopes to answer.
Hypothesis – Given a scientist’s previously existing knowledge, it is
what the scientist expects to happen.
An example: Find and write down the
Purpose and the Hypothesis
PATTY POWER
Mr. Krabbs wants to make Bikini Bottoms a nicer place to live. He has
created a new sauce that he thinks will reduce the production of body gas
associated with eating crabby patties from the Krusty Krab. He recruits 100
customers with a history of gas problems. He has 50 of them (Group A) eat
crabby patties with the new sauce. The other 50 (Group B) eat crabby patties
with sauce that looks just like new sauce but is really just mixture of
mayonnaise and food coloring. Both groups were told that they were getting
the sauce that would reduce gas production. Two hours after eating the
crabby patties, 30 customers in group A reported having fewer gas problems
and 8 customers in group B reported having fewer gas problems.
Components of an Experiment
Variable – anything that changes from group to group within an
experiment.
Test (Independent) Variable – the variable that the experimenter has
control over changing.
Outcome (Dependent) Variable – the measured/observed difference at
the end of an experiment (results).
An example: List the variables and label them
independent and/or dependent.
Mr. Krabbs wants to make Bikini Bottoms a nicer place to live. He has
created a new sauce that he thinks will reduce the production of body gas
associated with eating crabby patties from the Krusty Krab. He recruits 100
customers with a history of gas problems. He has 50 of them (Group A) eat
crabby patties with the new sauce. The other 50 (Group B) eat crabby patties
with sauce that looks just like new sauce but is really just mixture of
mayonnaise and food coloring. Both groups were told that they were getting
the sauce that would reduce gas production. Two hours after eating the
crabby patties, 30 customers in group A reported having fewer gas problems
and 8 customers in group B reported having fewer gas problems.
Components of an Experiment
Constant – an element within an experiment that is kept the same for
all groups within an experiment.
Control (Group) – an element that stays the same for one group, but
changes for another.
An example: Find and list the Constants, and
the Control group.
Bart believes that mice exposed to radiowaves will become extra strong (maybe he's
been reading too much Radioactive Man). He decides to perform this experiment by
placing 10 mice near a radio for 5 hours. He compared these 10 mice to another 10
mice that had not been exposed. His test consisted of a heavy block of wood that
blocked the mouse food. He found that 8 out of 10 of the radiowaved mice were able to push the
block away. 7 out of 10 of the other mice were able to do the same.
Components of an Experiment
1. What’s the difference between a constant and a control (group)?
2. Why would you study a group that you don’t change?
Components of an Experiment
Now, it’s your turn. On page 6 of your INB, list and identify all of the
following elements of your experiment from yesterday:
Purpose:
Hypothesis:
Test (Independent) Variable:
Outcome (Dependent) Variable:
Constants:
Control (group):
Bellringer (8/28/14)
On page 2 of your INB, explain the difference
between an Dependent variable (Outcome variable)
and an Independent variable (Test variable).
Scientific Method Notes (continued)
Please put these on page 9 of your INB
Quantitative Data vs. Qualitative Data – What’s the difference?
Scientific Method Notes (continued)
Please put these on page 9 of your INB
Quantitative Data vs. Qualitative Data – What’s the difference?
Quantitative data (think quantity) is data that features numbers.
Ex:
Bench Press Max Before And After Training
Group A
Group B
Group C
Before
178.7 kg
192.5 kg
201.2 kg
After
176.3 kg
199.1 kg
205.4 kg
Scientific Method Notes (continued)
Please put these on page 9 of your INB
Qualitative data is data that features qualities or attributes, like hair
color, eye color, types of coins, etc.
Ex:
Tastes of Various Coffee Brand
Brand A
Brand B
Brand C
Bland
Acidic
Robust
Comprehension Check
Now you think of and write down one example each for quantitative
data and qualitative data (NOT including any of the examples used).
Scientific Method Notes (continued)
The order of the Scientific Method:
1.
2.
3.
4.
5.
6.
7.
Have a Purpose/Ask a Question
Form a Hypothesis
Create an Experiment to test the hypothesis
Collect data while performing the experiment.
Analyze the results
Draw conclusions
Rework/Repeat