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Scientific Method
Scientific Method
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Scientific method
Flashcards
21 cards
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Questions
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Answers
1
An experiment that test the effect of a single variable is
Controlled Experiment
Independent Variable
Data
Control Group
2
Which statement best describes a hypothesis?
A hypothesis is the process of making careful observations
The conclusion drawn from the results of an experiment
basis for determining what data to collect
The facts collected from an experiment
3
Why do scientists consider any hypothesis valuable?
A hypothesis requires no further investigation
hypothesis requires no further investigation if it is proved
A hypothesis can be used to explain a conclusion
Disproved hypothesis will lead to more investigations
4
Researchers performing a well-designed experiment should base their conclusions on
results predicted before performing the experiment
the hypothesis of the experiment
data from repeated trials of the experiment
a small sample size to insure a reliable outcome
5
What is the dependent variable in the experiment?
light
soil
temperature
growth
6
The variable that is observed or measured in an experiment.
Independent Variable
Dependent Variable
Control Group
Experimental group
7
Which activity will help increase the validity of the experiment?
Repeating the experiment several times
Treating the control and experimental groups the same
Making up data
Using two different independent variables
8
Which condition is necessary for an experiment to yield useful data?
the experiment must be short
Similar results after the experiment is repeated
the hypothesis must be correct
Only the xepected results should be considered
9
What is the independent variable in this experiment?
growth
soil
light
temperature
10
Diagrams and data tables are used by scientists mainly to
organize data
predict an outcome
design a research plan
test a hypothesis
11
What variable is manipulated or purposely changed in an experiment?
Independent Variable
Dependent Variable
Control Group
Experimental group
12
What axis is the independent variable graphed on?
Both x and y
Y-axis
X-axis
Neither x or Y
13
What is the dependent variable in this graph?
time
population size
carrying capacity
limiting factor
14
Graphs are used by scientists to
predict an outcome
design a research plan
see trends in the data
test a hypothesis
15
As pH decreases, the number of tadpoles will
increase
nothing
remain the same
decrease
16
At a pH of 5 the number of tadpoles will likely be
23
45
18
75
17
Explain how the control group will be treated differently than the experimental group.
Control group will not get the independent variable
Control will get the independent variable
Control group will not be tested
Control will be the same as the experimental group
18
Identify the control group in the experiment below.
6 drops of fertilizer
2 drops of fertilizer
Zero Drops of fertilzer
4 drops of fertilizer
19
Which statement about the use of independent variables in a controlled experiment is correct?
The independent variable must involve time
A different independent variable must be used every time
The independent variables state the problem being tested
Only one independent variable is used for each experiment
20
The variables that must be kept the same in an experiment are known as
Independent variable
constants
Dependent varibale
control group
21
What is the dependent variable in this experiment?
pH of water
Soil
Water
Number of tadpoles
