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Unit 1 Scientific method Flashcards | StudBud
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Unit 1 Scientific method
Unit 1 Scientific method
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Unit 1 review Scientific method
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
Horseplay or practical jokes in the laboratory are
not dangerous.
okay.
okay if you are working alone.
always against the rules.
2
T/F Read all procedures thoroughly before entering the laboratory.
TRUE
FALSE
3
Long hair in the laboratory must be
always neatly groomed.
held away from the experiment with one hand.
tied back or kept entirely out of the way with a hair band.
cut short.
4
A structured procedure for collecting information to test a hypothesis is a
a theory
law
control
experiment
5
Indicate how many significant figures in 1.0000
1
6
2
5
6
Indicate how many significant figures in 0.678
4
3
2
5
7
According to Bernoulli's principle, when a fluid's speed increases what happens to the pressure of the fluid?
It increases
It stays the same.
It decreases.
8
When a measurement is repeatable and consistent it is said to have...
High accuracy
Low accuracy
High precision
Low precision
9
The collect data step of the scientific method comes before the hypothesis step.
False
True
10
indicate how many significant figures: 0.00340
2
3
5
6
11
After completing an experiment, all chemical wastes should be
left at your lab station for the next class.
taken home.
disposed of according to your instructor’s directions
dumped in the sink.
12
This bullseye demonstrates
High Accuracy and Low Precision
Low Accuarcy and High Precision
High Accuracy and High Precision
Low Accuracy and Low Precision
13
Calculate and round to the proper number of sig figs 28.367 / 3.74
7.5847
7.59
7.5847596
7.58
14
Indicate how many Significant Figures: 700000
5
2
5
1
15
Approved eye protection devices (such as goggles) are worn in the laboratory
to avoid eye strain.
any time chemicals, heat or glassware are used
to improve your vision.
only if you don’t have corrective glasses.
16
You have been injured in the laboratory (cut, burn, etc.). First you should
tell the science instructor at once.
apply first aid yourself.
visit the school nurse after class.
see a doctor after school.
17
How close a measurement is to the true value is called..
Estimate
Precision
Significant
Accuracy
18
The condition of an experiment which is kept the same is a
constant
independent variable
a hypothesis
conclusion
19
The independent variable is on the X-axis.
False
True
20
Indicate how many significant figures in 2003.1
5
3
4
6
21
Calculate and round to the appropiate number of sig figs 23.7 x 3.9
92
9
92.4
92.43
22
The steps commonly used by scientists to test a hypothesis and solve problems is called _____
scientific method
applied science
pure science
descriptive research
23
You say that the presence of water could increase the growth of bread mold. What is the IV?
all of these
growth rate
water
bread mold
24
In a laboratory, the following should not be worn.
loose clothing.
sandals.
dangling jewelry.
all of the above
25
Add and express to the proper number of sig figs 32.567 + 135.00
167.6
167.57
167.567
167
26
T/F :Chipped or cracked glassware is okay to use.
FALSE
TRUE
27
The information gathered from experiments is called _____.
hypothesis
conclusion
data
research
28
You are heating a substance in a test tube. Always point the open end of the tube
toward yourself.
toward another classmate.
away from all people
toward your lab partner
29
T/F: Pipets are used to measure small amounts of liquids. You should draw the liquid into the pipet using your mouth.
TRUE
FALSE
30
T/F: You are allowed to enter the chemical preparation/storage area any time you need to get an item.
FALSE
TRUE
