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Scientific Method/Experimental Design Living Environment Flashcards | StudBud
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Scientific Method/Experimental Design Living Environment
Scientific Method/Experimental Design Living Environment
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1
Which is an inference about the picture shown
There is a truck in the picture
the dog belongs to the driver of the car
A man is sitting on the sidewalk edge
There are 8 trees
2
A student performs an experiment using 10 snails in each setup. How can the experiment be improved?
repeat the experiment with larger sample size
revise the hypothesis
3
This is a rule of nature that predicts what will occur
Scientific Theory
Scientific Law
4
Which is an example of a hypothesis?
The heart rate of frogs increase as temperature increases
Does temperature affect the heart rate of frogs?
a beaker, 100 frogs, 1000 mL of water, thermometer
5
What should a scientist do if experimental data does not match their hypothesis?
adjust the data to support the hypothesis
explain why the hypothesis is incorrect & test a new hypothesis
eliminate data that does not support the hypothesis
6
How many experimental variables should be changed in an experiment by a scientist
2
3
4
1
7
Which is a quantitative observation?
The truck was driving too fast
There are 8 trees in the picture
8
The table below shows the data collected in an experiment. How can it be improved?
test supplement on both groups for 5 weeks instead of 10
test a 3rd group that does not receive supplement.
test only 1 group with 200 mg dose
test 3rd group that gets 150 mg dose
9
What should be done before an experiment?
make an inference based on results
a create a set of data
write a conclusion based on data
determine safety precautions to be used
10
Which is true of a scientific THEORY?
Theories are NOT subject to change
Theories are the outcome of 1 hypothesis
Only theories that have been changed are accepted
All theories are subject to change and improvement
11
What is the purpose of analyzing experimental data?
to design a control for the experiment
to draw a valid conclusion
to develop a research plan for the experiment
to formulate a hypothesis
12
The independent variable is what is measured in an experiment.
True
False
13
An experiment tests the effect of UV light on mold. The control group gets
UV light
no UV light
14
This is the variable that the scientists changes in an experiment
independent variable
dependent variable
controlled variable
15
Peer review includes all the following
except
pointing out possible bias
identifying illogical conclusions
analyzing experimental design
changing data to support hypothesis
16
This is a fake pill given to the control group in an experiment
Placebo
Tylenol
Vitamin
Aspirin
17
What is the function of a control group?
it is used to test the experimental variable
It is used for comparison with the experimental group
18
If experimental results are valid, biologists in other laboratories should be able to
repeat with different variable & get same results
perform same experiment & get different results
repeat experiment & get same results
