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pg. 10 Write: STARTER (and give
your answer, do not write the prompt)
Scientists are split between whether or not contacts
help protect the eye more in the event of a lab accident.
Using COMPLETE SENTENCES, give your opinion on this matter
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Table of ContentsDate Lecture/ Activity/ Lab Page Grade
8/28 Safety Contract 58/28 Plan for Success 6-7
8/28 Types of Graphs 8
8/29 Lab Equipment Notes 9
8/30 Starter/Exit 10
8/30 Experimental Design Notes 11
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Title page 11:
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A variable is something that changes.
*note: only 1 variable should be tested per
experiment**
A variable is something that changes.
*note: only 1 variable should be tested per
experiment**
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6 concepts of experimental design
6 concepts of experimental design
independent variableindependent variable
dependent variabledependent variable
constants
control groupcontrol group
experimental group
repeated trialsrepeated trials
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constants
all factors which are NOT allowed to change during the
experiment
all factors which are NOT allowed to change during the
experiment
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control groupcontrol group
the group (standard)(standard) to which everything is compared
nothing different or special is done to this group
the group (standard)(standard) to which everything is compared
nothing different or special is done to this group
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experimental groupexperimental group
the group(s) being tested with the independent
variable
the group(s) being tested with the independent
variable
Each test group has only ONE Each test group has only ONE FACTOR different from the other FACTOR different from the other
test groups:the test groups:the iindependent ndependent vvariable.ariable.
Each test group has only ONE Each test group has only ONE FACTOR different from the other FACTOR different from the other
test groups:the test groups:the iindependent ndependent vvariable.ariable.
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repeated trialsrepeated trials
The more times you repeat the experiment, the more VALID
your results are
The more times you repeat the experiment, the more VALID
your results are
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hypothesishypothesishypothesishypothesis
Independent Variable
Dependent Variable+
verb+ v
erb
If independent variable + verb,
then dependent variable + verb.
Hypothesis V ChartHypothesis V Chart
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independent variable
the variable that is changed on purpose by the
experimenter
the variable that is changed on purpose by the
experimenter
You have complete control over this
You have complete control over this
This is the ‘’if” part of a hypothesis.
This is the ‘’if” part of a hypothesis.
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independent variable
Manipulated by you
Independent Variable is one you control
X-axis of the graph is where you put this info
Manipulated by you
Independent Variable is one you control
X-axis of the graph is where you put this info
M.I.X.
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dependent variable
the variable that respondsthe variable that responds
this is your datathis is your data
This is the ‘’then” part of a hypothesis.
This is the ‘’then” part of a hypothesis.
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dependent variable
D.R.Y.D.R.Y.
Dependent Responding variable
Y-axis of a graph is where you put this info
Dependent Responding variable
Y-axis of a graph is where you put this info
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is used to design an experiment.
IVCDVIVCDVThe chart
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iviv dvdvconstants
constants
fertilizefertilizerrfertilizefertilizerr The variable (factor) The variable (factor)
that you will change is that you will change is the the iindependent ndependent vvariable.ariable.
0 drops0 drops0 drops0 drops
2 drops2 drops2 drops2 drops
4 drops4 drops4 drops4 drops
6 drops6 drops6 drops6 drops
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iviv dvdvconstants
constants
plant growthplant growthplant growthplant growthfertilizefertilizerrfertilizefertilizerr0 drops0 drops0 drops0 drops
2 drops2 drops2 drops2 drops
4 drops4 drops4 drops4 drops
6 drops6 drops6 drops6 drops
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iviv dvdvconstants
constants
plant growthplant growthplant growthplant growthfertilizefertilizerrfertilizefertilizerr
amt. of amt. of waterwateramt. of amt. of waterwatertype of soiltype of soiltype of soiltype of soil
type oftype of plantplanttype oftype of plantplant
type oftype of planterplantertype oftype of planterplantersize of size of planterplantersize of size of planterplanter
amt. of soilamt. of soilamt. of soilamt. of soil
type of lighttype of lighttype of lighttype of light
locationlocationlocationlocation
0 drops0 drops0 drops0 drops
2 drops2 drops2 drops2 drops
4 drops4 drops4 drops4 drops
6 drops6 drops6 drops6 drops
These are the factors that These are the factors that
must must NOTNOT change during change during
experimentation. They must experimentation. They must
remain remain constantconstant. .
These are the factors that These are the factors that
must must NOTNOT change during change during
experimentation. They must experimentation. They must
remain remain constantconstant. .
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no fe
rtili
zer
no fe
rtili
zer
2 dr
ops
fertili
zer
2 dr
ops
fertili
zer
4 dr
ops fe
rtili
zer
4 dr
ops fe
rtili
zer
6 dr
ops fe
rtili
zer
6 dr
ops fe
rtili
zer
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no fe
rtili
zer
no fe
rtili
zer
2 dr
ops
fertili
zer
2 dr
ops
fertili
zer
4 dr
ops fe
rtili
zer
4 dr
ops fe
rtili
zer
6 dr
ops fe
rtili
zer
6 dr
ops fe
rtili
zerWhat is this called?What is this called?
CONTR
OL
What are these called?What are these called?
EXPER
IMEN
TAL
GROUP
EXPER
IMEN
TAL
GROUP
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What are these called?What are these called?
CONSTANTS
CONSTANTS
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00 22 44 66
What is this called?What is this called?
The plant growth that you observe here can be called . . .
The plant growth that you observe here can be called . . . the results (of adding fertilizer) the results (of adding fertilizer) the response (to adding fertilizer) the response (to adding fertilizer) the effects (of adding fertilizer) the effects (of adding fertilizer)
dependent
dependent
variable
variable
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What do you do if you want to test the type of soil instead of
fertilizer?
What do you do if you want to test the type of soil instead of
fertilizer? iviv dvdvconstantsconstants
plant plant growthgrowthplant plant growthgrowth
fertilizerfertilizerfertilizerfertilizer amt. of wateramt. of wateramt. of wateramt. of water
type oftype of plantplanttype oftype of plantplant
type oftype of planterplantertype oftype of planterplantersize of plantersize of plantersize of plantersize of planter
amt. of soilamt. of soilamt. of soilamt. of soil
type of lighttype of lighttype of lighttype of light
locationlocationlocationlocation
type of soiltype of soiltype of soiltype of soil
type of type of soilsoiltype of type of soilsoil
Type of soil becomes the IV.
Fertilizer becomes a constant.
fertilizerfertilizerfertilizerfertilizer
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EXIT:
Write your own hypothesis and create a sample IV C DV chart like the one in your notes.
Questions?? Just ask :)