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Duplicate of Lab safety & Scientific method
Duplicate of Lab safety & Scientific method
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A review of Biology Unit 1 on Laboratory safety and the scientific method
Flashcards
17 cards
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Practice quiz
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Questions
17
Answers
1
Which of the following steps to solve a problem must be completed first?
analyzing data
testing a hypothesis
forming a hypothesis
recognizing and identifying a problem
2
Which sentence best describes a scientific theory?
It can be proven conclusively.
It can change every time it is tested.
It is well tested and explains a wide range of observations.
It can never change.
3
A sample that is treated exactly like the other experimental groups but the variable isn't used
observation
hypothesis
control
variable
4
Which of these steps to solve a problem is completed last?
drawing conclusions
recognizing and identifying the problem
testing a hypothesis
analyzing data
5
Approved eye protection devices (goggles) are worn in the laboratory
to improve vision
any time chemicals, heat or glassware are used.
to avoid eye strain
only if you don't have corrective lenses
6
A factor in an experiment that can change is a(n)
variable
observation
control
hypothesis
7
Long hair in the laboratory must be
always neatly groomed
cut short
held away from the experiment with one hand
kept back with a hairband
8
Examples of skills used in science include ____ & ______
observations & measurements
facts & inferences
clues & detectives
cholera & E.coli outbreaks
9
You are heating a substance in a test tube. Always point the open end of the tube
toward another classmate
toward your lab partner
toward yourself
away from all people
10
What characteristic must be true of a good hypothesis?
It must have been observed many times,
It must involve quantitative data.
It must be testable by observation or experiment.
It must be correct.
11
Personal eyeglasses provide as much protection as
splashproof chemical goggles
safety glasses
a face shield
none of the above
12
Flammable materials like alcohol should never be used near _____________________
an open door
an open flame
a sink
another student
13
A way to reduce bias in an experiment is to ___
use descriptive phrases as your data
take numerical measurements of the results
make sure the results come out the way you want them
ask only girls a question about a school topic
14
After scientists analyze the results of their experiments, they
choose the variables they want to test
communicate those results to other people
include a control
form a hypothesis
15
After completing an experiment, all chemical wastes should be
disposed of according to your instructor's instructions
left at your lab station for the next class
taken home
dumped in the sink
16
A prediction or statement that can be tested is a(n)
conclusion
control
observation
hypothesis
17
You have been injured in the laboratory (cut, burn, etc.). First you should
apply first aid yourself
see a doctor after school
tell the instructor at once
visit the school nurse after class
