Scientific Method - Alvin Independent School District

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If you did not pick
up homework
yesterday do so
today!! Due FRIDAY
Get out ISN we are taking notes
over Scientific Method/Lab Write up
Tutorials tomorrow morning for lab
make-up and homework help 8am
Scientific
Method/Lab Write
up
An orderly and
systematic way of
solving a problem
1. PROBLEM
QUESTION YOU
ARE SEEKING AN
ANSWER FOR
ALWAYS IN THE FORM OF
A QUESTION.
 Does the amount of liquid affect the growth
of plants?
 Does the type of liquid affect the growth of
plants?
 Does the amount of light affect the growth of
plants?
 Does the type of soil affect the growth of
plants?
MUST BE ABLE TO ANSWER
THROUGH EXPERIMENTATION
-RESEARCH
COLLECT KNOWN
INFORMATION
EXAMPLE: RESEARCH
READ
OBSERVE
-PREDICTION
 A LOGICAL GUESS OF AN
OUTCOME BASED ON
DATA AND PRIOR
KNOWLEDGE. IF YOU
HEAR THUNDER, YOU
COULD PREDICT THAT IT
WILL RAIN.
2. HYPOTHESIS
EDUCATED GUESS
TO ANSWER THE
QUESTION
 The more research, the better
our hypothesis
Should be written in an
“if- then” statement
 I think if the amount of light is changed,
then the plant growth will be affected.
 I think if the type of liquid is varied, then
the plant growth will change.
 I think the type of fertilizer affects plant
growth.
Face Book Activity
# Post
Try to organize
3
---------
5
7
10
hypothesis
3. EXPERIMENT
PLANNED WAY OF
SOLVING A PROBLEM
WRITTEN AS STEPS
KNOWN AS
PROCEDURE.
GIVING
INSTRUCTIONS LAB
 Tell me how to make Peanut butter and
Jelly Sandwich
GIVING
INSTRUCTIONS
 Quick Write- Using 5 complete
sentences, describe what happened and
write what you learned
VARIABLE
FACTORS IN AN
EXPERIMENT
THAT CHANGE
1. Independent Variable
 M- Manipulated
 I- Independent
 X- X axis
 This is the variable that you are
purposefully changing.
 YOU MAY ONLY HAVE 1
INDEPENDENT VARIABLE
2. Dependent Variable
 D- Dependent
 R- Responding
 Y- Y axis
 This is the variable you are
measuring it will be recorded in
your data!
CONSTANT
FACTORS IN AN
EXPERIMENT THAT
A SCIENTIST
PURPOSELY KEEPS
THE SAME.
CONTROL
 group that serves as the
standard of comparison.
 Treated as the same as the
samples, but not exposed to the
independent variable
Write the procedure to make a peanut
butter jelly sandwich. Be sure to write
them in steps and be specific!
4. DATA/
OBSERVATIONS
COMPILE DATA
INFORMATION
COLLECTED FROM
EXPERIMENTS
-OBSERVATION
DATA THAT YOU
COLLECT THAT YOU
CAN PHYSICALLY
OBTAIN USING YOUR
5 SENSES.
-INFERENCE
 LOGICAL INTERPRETATION
BASED ON PRIOR
KNOWLEDGE AND
EXPERIENCE. IF SOMEONE
IS WET, YOU COULD INFER
IT IS RAINING OUTSIDE.
Observations vs.
Inferences
1.
2.
3.
4.
5.
6.
7.
The plant has roots.
The plant uses water.
The plant has leaves.
The plant has flowers.
The plant grew from a seed.
The plant is growing in soil.
The plant is green and
yellow.
8. The plant is growing in a
pot.
1. Young people are
playing basketball.
2. The players are in
high school.
3. People are watching
the game.
4. The score is tied.
5. The game is almost
over.
6. The people are
indoors.
7. There are 6 players
MYSTERY Diapers
 List 5 observations
 (I see, I feel, I smell, etc)
 List 5 inferences
PRECISION
 MEASURING WITH
ACCURACY AND
EXACTNESS. A
MEASUREMENT OF
5.5CM IS MORE PRECISE
THAN 5CM.
AVERAGING NUMBERS
 MANY TIMES SCIENTISTS
WILL HAVE SEVERAL
ANSWERS FOR A PART OF
AN EXPERIMENT. The best
method of dealing with this
situation, is to average.
EXAMPLE OF AVERAGING
 ADD THE DIFFERENT
ANSWERS TO REACH A
TOTAL. THEN DIVIDE
THE TOTAL BY THE
NUMBER OF DIFFERENT
ANSWERS.
GRAPH
A PICTURE OF
DATANUMERICAL
DATA
KINDS OF GRAPHS
 1. CIRCLE GRAPH
A. DIVIDED CIRCLE
B. SHOWS HOW A PART
OF SOMETHING
RELATES TO THE
WHOLE VALUE.
BAR GRAPH
 HELPS YOU COMPARE THINGS
SUCH AS –
AMOUNTS or QUANTITIES
LINE GRAPH
 A. LETS YOU
PLOT SEVERAL
DIFFERENT
FORMS OF
DATA.
 B. HELPS YOU
SEE PATTERNS
OR TRENDS.
TAILS
Title: Includes both
variables
Axis: IV on X-axis and DV
on
Y-axis
Interval: The interval (4) is
appropriate for this scale.
Label: Both axes are
labeled.
Scale: Min and max values
are appropriate.
Plant Growth
time (days)
height (cm)
1
15
7
26
14
33
21
47
24
54
30
60
GRAPHING DEDUCTIONS









Title (5)
X & Y title (5)
X label/ scale (5)
Y Label/ scale (5)
Start at zero (5)
Straight lines (5)
# increments (5)
IV/ DV (20)
Plot (20)
5. CONCLUSION
ANSWER TO THE
PROBLEM
THEORY
MOST LOGICAL
EXPLANATION
FOR EVENTS
THAT HAPPENED
LAW
 A THEORY THAT HAS
BEEN TESTED MANY
TIMES AND IS
GENERALLY ACCEPTED
AS TRUE.
REPLAY Conclusions
 R – restate the problem question
 E – explain what you did to test
 P – pull in the data
 L – look for patterns
 A – answer the problem question
 Y – yes or no to hypothesis
(hypothesis correct? Why or why
not?)
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