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Scientific Method
Scientific Method
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Unit 1 Quiz 1 on Scientific Method (IV, DV, CV, Control Group, POHEC, and graph interpretation)
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Answers
1
In a controlled experiment, how many variables should be tested at one time?
3
4
2
1
2
Why is it important when running an experiment to run multiple trials?
Because the teacher told you to.
This increases validity of an experiment
More trials means everyone will trust your answer.
It means you found the right answer.
3
Qualitative data is
data that is observed example: color/dull/bright
Data that is measured: 23 cm
4
If all 700 of your data points were 10-20, and
one
is 47...what would probably explain this?
someone lied
human error
the numbers really were that different
there is no possible explanation
5
What is the IV for this experiment?
Type of Pesticide
Number of weeks observed
average plant growth
Number of plants with beetle damage
6
Testing a hypothesis is called
the SI System
an experiment
a theory
a conclusion
7
How many variables should a good scientist change in an experiment?
one
three
four
two
8
The recorded measurements taken during an experiment are
variables
controls
data
conclusions
9
During an experiment, results from an experimental group should be compared with a ___.
dependent variable
independent variable
control group
hypothesis
10
Data that can be accurately measured. Example the height of the plant is 46.3 cm
qualitative data
quantitative data
11
If mice are exposed to microwaves, then they will become extra strong. Identify the next step.
design and run an experiment
identify a problem
make a hypothesis
draw conclusions
12
When running an experiment, this is the group that you are investigating/testing.
control group
controlled variable/constant
independent variable
dependent variable
13
What might be a logical constant/controlled variable for this experiment?
type of plants used
amount of pesticide sprayed
number of weeks observed
all are appropriate constants/CVs
14
Scientists gather information using
all of the above
research
inferences
Their five senses
15
How do lenses of different sizes affect the size of the object being viewed? Identify DV
the ruler
the person measuring
size of object being viewed
different sized lenses
16
How does using different types of metal in a generator affect the rate the motor spins? IV is
the generator
metal in the generator
rate of motor spin
person running tests
17
A statement that can be tested and includes the words "If" and "then" is a
observations
variable
experiment
hypothesis
18
Does fertilizer have an effect on plant growth? This is a
problem
conclusion
hypothesis
prediction
19
What's the control group for this experiment?
number of plants with new beetle damage
number of weeks observed
original pesticide group
new beetle pesticide
20
The one factor in an experiment that is manipulated/changed or altered by the scientist.
Dependent variable
Independent variable
21
What is the dependent variable for this experiment?
Type of music
no music group
Number of Tests
Number of test answers correct
22
If you have a data point that doesn't fit the rest, this is called a(n)
outlier
variable
constant
valid experiment
23
Your ‘educated guess’, and possible explanation for a problem is called your
hypothesis
corroboration
guess
prediction
