Flashcards for Unit 1

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Flashcards for Unit 1
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Matter
Anything that has mass occupies space.
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7
How many fundamental units in the SI system?
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Fundamental or Base Unit
Physical quantity that must be measured. It
cannot be calculated.
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Derived Unit
A unit defined as a combination of fundamental
units.
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Unit of mass
Kilogram
Fundamental Unit
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Unit of time
Second
Fundamental Unit
8
Unit of length
Meter
Fundamental Unit
9
Unit of temperature
Kelvin
Fundamental Unit
10
Space or Capacity
Volume
Derived Unit
11
Metric Unit of Volume 10 cm X 10 cm 10 cm
Liter
Derived Unit
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1000 cm3 1 Liter
? cm3 1 Liter
Derived Unit
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1000 mL 1 Liter
? milliliter 1 Liter
Derived Unit
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1 mL 1 cm3
? milliliter 1 cm3
Derived Unit
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1 kilogram
What is the mass of 1 liter of pure H2O?
Mass/Volume relationship
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1 gram
What is the mass of 1 cm3 of pure H2O?
Mass/Volume relationship
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273 K
Freezing Point of water in the Kelvin scale.
Physical Constant
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373 K
Boiling Point of water in the Kelvin scale.
Physical Constant
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0? C
Freezing Point of water in the centigrade scale.
Physical Constant
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100? C
Boiling Point of water in the centigrade scale.
Physical Constant
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Another name for freezing point.
Ice / water equilibrium
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Another name for boiling point.
Steam / water equilibrium
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100 cm 1 meter
? cm in 1 meter
Conversion Fact
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1000 mm 1 meter
? mm in 1 meter
Conversion Fact
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1000 m 1 kilometer
? m in 1 km
Conversion Fact
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Mass / Volume
Density
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Describes how matter is packed into space.
Density
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grams / cm3
Units of Density
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M
D
V
Density
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How close a measured value is to an accepted
value.
Accuracy
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How close a series of measurements are to one
another.
Precision
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?Measured value Accepted value? x 100
Accepted value
Percent Error
Table T, reference tables
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K ?C 273
?C to K
Table T, reference tables
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The number is written as a product of 2
numbers - a number between 1 10 - a power of
10
Scientific Notation
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Negative exponent so the number is between 0 and
1 0.002
2 X 10-3
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Positive exponent so the number is greater than
1 500
5 X 102
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All known digits plus 1 estimated digit.
Significant Figures
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Decimal Present Pacific side Start counting at
1st nonzero
5400.145 cm
7 sig figs
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Decimal Present Pacific side Start counting at
1st nonzero
0.0175 g
3 sig figs
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Decimal Absent Atlantic side Start counting at
1st nonzero
4855 g
4 sig figs
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Decimal Absent Atlantic side Start counting at
1st nonzero
4000 mm
1 sig fig
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Answer has same number of decimal places as the
addend with the least number of decimal places.
Significant Figures Addition and Subtraction
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77.2 cm is correct!
28.0 cm 23.538 cm 25.68 cm
But what do you report?

77.218 cm
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Answer has same number of significant figures as
the factor with the least number of significant
figures.
Significant Figures Multiplication Division
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78 m2 is correct!
24 m X 3.26 m 78.24 m2
But what do you report?