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Unit 2 Review--Measurement Flashcards | StudBud
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Unit 2 Review--Measurement
Unit 2 Review--Measurement
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Unit 2 Exam review for chemistry
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
The scientific notation for the number 0.0006730 is
6.730 x 104
6.730 x 10-4
0.673 x 10-3
67.30 x 10-5
2
In a line graph, the x-axis is the ___ variable and the y-axis is the ___ variable.
dependent & independent
dependent & constant
independent & constant
independent & dependent
3
Which of the following cannot be separated through simple filtration?
coffee and coffee grounds
salt water
strawberries and dirt
dirty water
4
Which of the following is not part of the scientific method?
introducing bias
making an educated guess
making measurements
analyzing data
5
Which of the following measurements contains three significant figures?
20.2 mL
200.0 mL
0.02 mL
200 mL
6
A theory differs from a hypothesis in that a theory
always leads to the formation of a law
cannot be disproved
represents an educated guess
has been subject to experimental testing
7
The process of ice melting into water is an example of a...
chemical property
physical change
chemical change
physical property
8
Which of the following statements contain exact numbers?
She took about 10 minutes to arrive.
The car travelled at 60 mph.
The circumference of the Earth at the equator is 40,000 km.
There are 12 eggs in a dozen.
9
A metal sample has a mass of 45.65 g and a volume of 16.9 cm
3
. The density of the sample is...
0.37 g/cm3
2.7 g/cm3
2.70 g/cm3
0.370 g/cm3
10
A measurement of 23,456 mm converted to meters equals
2.3456 m
234.56 m
23.456 m
0.23456 m
11
Convert 50 in/min into m/sec.
0.021 m/s
76.2 m/s
80 m/s
0.02 m/s
12
A liquid has a m= 11.50 g & a v= 9.03 mL. How many sig figs should be in its density?
4
3
5
2
13
Which of the following masses is the largest?
0.020 kg
2000 μg
20.0 mg
0.200 g
14
The accuracy of a measurement
is how close it is to the true value
is something that scientists rarely achieve
does not depend on the instrument used to measure the object
indicates that the measurement is also precise
15
Grass growing is an example of a...
Physical change
Physical property
Chemical change
Chemical property
16
According to a graph of density, the mass and volume are ______ proportional.
constantly
inversely
consecutively
directly
17
When numbers are multiplied or divided, the answer can have no more
digits to the right of the decimal point that are smallest
sig figs than are in the measurement that has the smallest
sig figs than are in the measurement that has the largest
digits to the right of the decimal point that are largest
18
All measurements in science
must be expressed in scientific notation
are both accurate and precise
have some degree of uncertainty
must include only those digits that are known with certainty
19
Density, flammability, and reactivity are all examples of what?
Chemical property
Intensive property
Physical property
Extensive property
20
An object has a density of 11.36 g/cm
3
. If an object has a volume of 24 mL, what is it's mass?
2.1 g
272.64 g
4.7 g
0.47 g
