Steps of
scientific
method
Variables
Measurement
Lab Safety
Metric
Estimation
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Question 1 - 10
• Mr. Ranft, you have to keep those soccer
players out of our classroom. Their shin
guards are stinking up the place.”
• Observation or inference?
• (#2)
Answer 1 – 10
• Inference – maybe it was Mr. Ranft’s lunch
that was so stinky…
• (The observation is that the room is stinky.)
Question 1 - 20
• What is the relationship between the
conclusion and the hypothesis? (#3)
Answer 1 – 20
• The conclusion states whether or not the
experiment supported the hypothesis.
Question 1 - 30
• If you wanted to know which kind of cereal
will help you be most awake in school, would
you make a model, make observations, or do
an experiment? Explain your answer. (#5)
Answer 1 – 30
• You would do an experiment, in which “kind of
cereal” is the independent variable and “how
awake you are in school” is the dependent
variable.
Question 1 - 40
• A student wanted to know how music affected his
pets. He played rap music all day long for 5 days in
the room where he kept his lizard, Ziggy. He played
classical music all day long for 5 days in the room
where he kept his gerbil, Gerry. At the end of five
days, Ziggy the Lizard was calm and quiet, and Gerry
the Gerbil was very active. The student concluded
that rap music has a calming effect on pets, because
Ziggy was calm after 5 days listening to rap, but Gerry
was very active after 5 days listening to classical.
•
• Did the student make a valid conclusion? (#6)
Answer 1 – 40
• No – the student changed both the kind of
music and the kind of animal.
• Was Ziggy calm and quiet because he was a
lizard or because he listened to rap music?
Question 1 - 50
• Why does a good experiment have only one
independent variable? (#4)
Answer 1 – 50
• If you changed more than one thing in your
experiment, you wouldn’t know which thing
affected your results.
Question 2 - 10
• You have nine tomato plants. Design an
experiment to determine the effect of soil
type (sand, potting soil, garden soil) on how
tall the plants can grow.
• What is your independent variable? (#1)
Answer 2 – 10
• type of soil
Question 2 - 20
• You have nine tomato plants. Design an
experiment to determine the effect of soil
type (sand, potting soil, garden soil) on how
tall the plants can grow
• What is your dependent variable? (#1)
Answer 2 – 20
• how tall the plants can grow
Question 2 - 30
• You have nine tomato plants. Design an
experiment to determine the effect of soil
type (sand, potting soil, garden soil) on how
tall the plants can grow
• What is the control set-up? (#1)
Answer 2 – 30
• the tomatoes in garden soil, because that is
where they usually grow
Question 2 - 40
• You have nine tomato plants. Design an
experiment to determine the effect of soil
type (sand, potting soil, garden soil) on how
tall the plants can grow
• Name THREE different constants for this
experiment. (#1)
Answer 2 – 40
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kind of tomato plant
amount of water
amount of sunlight
temperature
size of pot
humidity of room
amount of fertilizer
etc. etc. etc.
Question 2 - 50
• Quick – if the independent variable is what is
changed on purpose, what is the dependent
variable? (not on study guide, but still
important…)
Answer 2 – 50
• what is measured or observed as the
experiment goes on
Question 3 – 10 How many…
(all #9)
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nanograms in a gram
centimeters in one meter
watts in a megawat
microliters in one liter
millimeters in a centimeter
bytes in a gigabyte
milligrams in one gram
meters in a kilometer
Answer 3 – 10
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a. centimeters are there in one meter? one hundred
b. microliters would there be in one liter? one million
c. milligrams are there in one gram? one thousand
d. watts are in a megawatt? one million
e. meters are there in a kilometer? one thousand
f. millimeters are there in a centimeter? ten
g. nanograms would there be in one gram? one billion
h. bytes are in a gigabyte? one billion
Question 3 – 20 (all #10)
• What would you use to estimate:
1 kilometer
1 gram
1 meter
1 milliliter
1 liter
1 centimeter
1 millimeter
1 kilogram
Answer 3 – 20
a.
b.
c.
d.
e.
f.
g.
h.
1 gram
mass of 1 Teddy Graham
1 centimeter width of your pinky
1 meter 1 yard
1 liter 1 quart
1 kilometer 2/3 of a mile
1 millimeter thickness of a penny
1 kilogram 2 pounds
1 milliliter 1/5 of a teaspoon
Question 3 - 30
• MASS (all #7)
• What is it?
• What is the basic unit?
• How do you measure it?
Answer 3 – 30
• Mass is the amount of matter in an object.
• The basic unit is the gram.
• You use a balance to measure it.
Question 3 - 40
• LENGTH (all #7)
• What is the basic unit?
• What is length?
• How do you measure it?
Answer 3 – 40
• meter
• distance from one point to another
• with a metric ruler
Question 3 - 50
• VOLUME (all #7)
• How do you measure it?
• What is it?
• What is a basic unit of volume?
Answer 3 – 50
• with a ruler and calculator OR with a
graduated cylinder
• amount of space occupied by something
• liter
Question 4 - 10
• One safety rule that would apply for a lab
involving chemicals (#13)
Answer 4 – 10
• wear your goggles over your eyes at all times
dispose of chemicals as instructed
Waft with me!
etc.
Question 4 - 20
In the upper left of the
picture, what does
“Sue” need to do to
be safe in the lab?
Answer 4 – 20
• Tie her hair back
Question 4 - 30
Since he is closest to
it, what should “Duke”
do with the fire
blanket to help Sue?
Answer 4 – 30
• Pull the black tab to get it out, then wrap it
around Sue’s head to smother the flames.
Question 4 - 40
Because Tim and Ray
were “horsing
around,” Jim
accidentally splashed
some of his chemical
into his eyes.
If this had happened
in our classroom,
what is a possible
consequence for
Tim/Ray?
Answer 4 – 40
• Have to leave the lab.
• Will have to make it up after school.
• Might have to sit out for the next three labs.
Question 4 – 50
John is Jim’s lab
partner. The eye
wash bottle is near
the bottom of the
picture.
What should John do
to help Jim?
Answer 4 – 50
• Guide Jim toward the eye wash, while
shouting out to the teacher.
• Remove the cap from the eye wash bottle.
• Pour the solution over Jim’s eyes, until the
teacher arrives to take over.
Question 5 - 10
• About how high is our ceiling?
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3000 centimeters
3 kilometers
30 meters
3 meters
Answer 5 – 10
• 3 meters
Question 5 - 20
• What is the approximate volume of Spike
Nemo Jr.’s fish bowl?
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5 liters
5 milliliters
0.5 liters
0.5 milliliters
Answer 5 – 20
• 0.5 liters
Question 5 - 30
• How much mass does Spike Nemo Jr. have?
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0.5 kilogram
0.5 gram
10 milliliters
10 grams
Answer 5 – 30
• 10 grams
Question 5 - 40
• How far is it to the entrance to White
Memorial?
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About 0.5 kilometer
About 5 kilometers
About 10 kilometers
About 500 centimeters
Answer 5 – 40
• About 0.5 kilometer
Question 5 - 50
• When is your note card due in this
classroom???
Answer 5 – 50
• BEFORE the beginning of Core 1