Lab Safety & Scientific Method Quiz 1
What do you call the information scientists collect when doing experiments and making observations?
Data
What do you call a sample that goes through all the steps of an experiment but is not exposed to the experimental varible?
controlled group
Which variable is predicted by the hypothesis?
dependent variable
What is a tentative explanation of observed phenomena?
hypothesis
How does exercise affect heart rate?
it increases heart rate
Heart rate is typically represented as beats per
minute
should you taste, or smell any chemicals?
no
is it ok to horseplay, practical jokes, and pranks in the lab?
no because they are dangerous and prohibited
Should you return unused chemicals to their original containers?
no, never
should you remove chemicals or other materials from the lab?
no, never
Are you supposed to touch any equipment, chemicals, or other materials in thee laboratory area?
No, not until you are instructed to do so
Why is it important to have many subjects in an experiment?
To produce results with a wide range of variables, giving better representation to larger populations.
If you do not understand a direction or part of a laboratory procedure, you should
ask your instructor before proceeding with the activity
Should work areas should be kept clean and tidy?
yes
What step in the scientific method comes after you have run your experiment and made your observation?
Conclusion
Which variable is purposely changed in an experiment?
An independent variable
Why is a theory more comprehensive than a conclusion?
Because theory is formulated based on many individuals conclusions
is it ok to eat food, drink beverages, or chew gum in lab?
No
Where is the heart rate typically measured on the body?
Radial Pulse on the Wrist
Which process involves making observations, formulating hypotheses, doing experiments, and coming to a conclusion?
Scientific method
Why is it important to have a control for an experiment?
To be able to observe changes in the variable being tested
how does one test a hypothesis ?
a scientist performs an experiment; a well-designed experiment must have a control
What is an encompassing conclusion based on many individuals conclusions?
theory
