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Unit 1 Test Review 2021
Unit 1 Test Review 2021
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Significant figures and measuring in chemistry
Flashcards
45 cards
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Questions
45
Answers
1
What is the name of our principal?
Mr. Young
Mr. Alexander
Ms. Simms
Mr. Sikora
2
How do you find the volume of an irregular shaped object?
displacement
scale
pH instrument
ruler
3
Which is NOT used to find volume?
scale
graduated cylinder
L * W * H
displacement
4
A process involving a series of steps scientists use in order to solve problems or discover information about the world.
Engineering practices
Scientific Laws and Theories
Scientific Method
Experimental Design
5
A scientific ____ is well-tested concept that explains a wide range of observations. It explains
why
something happens.
hypothesis
law
theory
conclusion
6
Volume is the amount of __________ an object takes up.
mass
matter
space
area
7
What is today's spirit day?
Dress for Success Day
Twin Day
2000s day
Casual Thursday
8
What is a Scientific Law?
A law created by scientists on why something works in legislature
statement about what happens in nature; does not explain why or how
an accepted hypothesis that explains why or how something occurs in nature
a way of explaining things or events;
9
Which variable does the scientist change in an experiment?
Independent
Constant
Controlled
Dependent
10
8.23 cm = ___________ mm
0.823
8.23
0.0823
82.3
11
The amount of water in the graduated cylinder is
21.5
21
22
22.5
12
What is the study of the composition of matter and the changes it undergoes
biology
physical science
chemistry
physics
13
What is FALSE about a hypothesis?
It is testable.
It is an if/then statement.
It is a possible solution to the problem.
It states the question that the scientist wants to solve.
14
What is the theme of homecoming?
Blue and Columbia Rain
Let's Glow Crazy!
Party Like it's 1999
When Hawks Cry
15
Which group in an experiment does not have its independent variable changed? It is left alone.
Hypothesis Group
Control group
Constant Variable
Experimental group
16
A measurement includes a number and a(n)
unit
abbreviation
letter
symbol
17
A scientist tests aspirin on blood pressure rates. What is the independent variable?
blood pressure rates
the aspirin
the scientist
the patients
18
What is the volume in the graduated cylinder?
23.9 mL
25.0 mL
24 mL
23 mL
19
A scientist tests aspirin on blood pressure rates. What is the experimental group?
the blood pressure
the group receiving a placebo
the group receiving the aspirin
the aspirin
20
Convert 54 mL to cL
.54
540
5400
5.4
21
What group in the experiment has its independent variable changed?
control group
the constant group
experimental group(s)
the outliers
22
What is the volume of the jade? (the cylinders are before and after)
110.5 mL
10.5 mL
50 mL
60.5 mL
23
What is the base unit for mass?
moles
gram
liters
kilogram
24
Which of these units is the imperial system unit for length?
centimeters
meters
yards
liters
25
What is the base unit in the SI System for time?
liters
seconds
hours
grams
26
If the amount of a reactant is increased then the rate of the reaction will increase. This is an example of a(n)
scientific problem
conclusion
hypothesis
experiment
27
Which IS WRONG?
mass = grams
volume = cm3
length = m2
temperature = Kelvin
28
This person would be considered.....
accurate but not precise
precise but not accurate
accurate and precise
neither precise or accurate
29
What is the the curved upper surface of a liquid in a graduated cylinder called?
the line of slope
cyclinder hang
the meniscus
volume
30
What is the average kinetic energy of particles in a substance called?
its motion index
its temperature
its mass
its inertia
31
Which is a description of how close a measurement is to the true value of the quantity measured.
specific data points
precision
error range
accuracy
32
Which is WRONG?
time = seconds
volume = cm3 and grams
length = meters and millimeters
all are correct
33
What is the base unit for temperature?
Fahrenheit
Celsius
kilograms
Kelvin
34
A scientist wants to test how a lack of sleep affects students' performance on a reading test. The dependent variable is
students who had little sleep
performance on the reading test
students who had maximum sleep
lack of sleep
35
What is the SI base unit for length?
kilometer
meter
miles
feet
36
A scientists tests different salts on the thawing rate of ice. The dependent variable is
how fast the ice melts
the type of salt
the ice without salt
the ice with salt
37
0.53 hL = L
.053
.0053
53
5.3
38
453 mL = _____ L
0.0453
45.3
0.453
4.53
39
Why is a control group important?
It is used as a comparison
It tests the independent variable
It is a constant
It tests the dependent variable
40
What is a measure of how close a series of measurements are to one another?
error range
accuracy
date consistency model
precision
41
The _______________ follows the hypothesis in the scientific method.
conclusion
problem
experiment
analyzing of data
42
A researcher tests a new fuel additive on a sports car's acceleration. What would be a control group?
sports car with the fuel additive
sports car without the fuel additive
acceleration
fuel additive
43
Which is a quality of a good experiment?
Two or more control groups
All variables are constant except the independent variable
More than one independent variable
Only one dependent variable
44
Which of these IS NOT a metric system unit?
cm3
liters
grams
inches
45
10 s- Scientists use the
both of these
the scientific method
SI system
