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