BELLRINGER 8/27/14On page 2 of your INB, identify the following elements of the experiment you did yesterday:

1.Purpose2.At least one variable3.At least one constant

Scientific Method NotesPut on page 7 of your INBPurpose/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 ExperimentVariable – 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 ExperimentConstant – 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 Experiment1. 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 ExperimentNow, 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. Have a Purpose/Ask a Question2. Form a Hypothesis3. Create an Experiment to test the hypothesis4. Collect data while performing the experiment.5. Analyze the results6. Draw conclusions7. Rework/Repeat