measurement & problem solving review
DESCRIPTION
Kilo- 1,000. Hecto - 100. Deka - 10. Base Unit m, L, g,s. Deci - 0.1. Centi - 0.01. Milli - 0.001. Measurement & Problem Solving Review. Convert 865.3 g to dag. 86.53 dag. - PowerPoint PPT PresentationTRANSCRIPT
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Measurement & Problem Solving Review
Kilo-
1,000 Hecto-
100 Deka-
10 Base Unit
m, L, g,sDeci-
0.1 Centi-
0.01 Milli-
0.001
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Convert 865.3 g to dag
• 86.53 dag
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_______________ measurement is a measurement that gives results in a definite
form, usually in numbers and units
• Quantitative
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Convert 6,250mL to L
• 6.250 L
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__________ shows how close a series of measurements are to one another
• Precision
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Convert 425.2 km to m
• 425,200 m
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What formula is used to calculate percent error?
Valueaccepted – Valueexperimental X 100
Valueaccepted
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What is the density formula?
D = _M_ V
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What is the abbreviation of a dekagram?
• dag
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_________ is a measure of linear distance
• Length
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______________ measurement is a measurement that gives descriptive,
NONnumeric results
• Qualitative
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_________ is a measure of the gravitational pull on matter
• weight
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Convert 78.6 s to ms
• 78,600 ms
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_______ is a measure of the amount of space occupied by a sample of matter
• volume
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Write the following in scientific notation: 458,600,000
• 4.586 x 108
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The zinc was a solid, gray metal. What type of measurement is this (qualitative or quantitative)?
• qualitative
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Describe the proper way to read a measurement from a graduated
cylinder.
• Eye level• Bottom of meniscus
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Write out the metric prefix conversion chart.
Kilo-
1,000 Hecto-
100 Deka-
10 Base Unit
m, L, g,sDeci-
0.1 Centi-
0.01 Milli-
0.001
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The curvature of a liquid in a container because of surface tension is known as
the __________
• meniscus
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List 2 units that density could be expressed in.
• Any mass/volume unit!• EX: g/mL, mg/L, g/cm3
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_____ is a measure of the quantity of matter in a sample
• mass
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What piece of lab equipment is used to measure mass?
• Scale/balance
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_________________ shows how close a measurement comes to the true or accepted value of what is measured
• accuracy
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Suppose you wanted to find the volume of a penny. What would you do?
• Water Displacement- fill a graduated cylinder with water. Record volume. Add penny. Record volume. Take the difference between the volumes and that would be the volume of the penny!
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What piece of lab equipment is used to measure volume accurately?
• Graduated cylinder
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The zinc had a mass of 58.3g. What type of measurement is this (qualitative or quantitative)?
• quantitative
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What is the abbreviation of a centiliter?
• cL
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What is the abbreviation of a cubic hectometer?
• hm3
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Aluminum has a mass of 13.5g and a volume of 5.25mL. Calculate the
density of this piece of aluminum.
D = _M_ V = __13.5g__ 5.25mL= 2.57g/mL
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Which unit is larger: centigram, milligram?
• centigram
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Aluminum has a density of 2.669g/mL. Suppose a student measures the
volume to be 3.2mL. Calculate the mass of this piece of aluminum.
• M = DV• M = (2.669g/mL)(3.2mL) = 8.54g
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Which unit is larger: meter, decimeter?
meter
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Convert 2.6 hg to mg
• 260,000 mg
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Write the following in ordinary notation: 5.23 x 10-4
• 0.000523
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Write the following in ordinary notation: 6.49 x 10-2
• 0.0649
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Write the following in scientific notation: 0.0000365
• 3.65 x 10-5
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Which unit is larger: kilogram, milligram?
• Kilogram
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Write the following in scientific notation: 8,642 x 108
• 8.642 x 1011
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A chemistry student mixes rubbing alcohol, water, and honey in a beaker. She noticed that the honey is at the bottom of the beaker, the water is in the middle and
the rubbing alcohol is at the very top. Explain this observation in relation to the relative densities of
rubbing alcohol, water, and honey.
• Rubbing alcohol is less dense than water since it is on top of the water.• Honey is more dense than water since it is on
the bottom of the beaker.
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Write the following in scientific notation: 0.0000065
• 6.5 x 10-6
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Write the following in ordinary notation: 1.57 x 106
• 1,570,000
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Which unit is larger: meter, hectometer?
hectometer
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What is the abbreviation of a decigram?
• dg
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Aluminum has a density of 2.669g/mL. Suppose a student measures the mass to be 14.3g. Calculate the volume of
this piece of aluminum.
V = _M_ D= __14.3g__ 2.669g/mL
= 5.36 mL
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Ryan measured a piece of aluminum to be 12.21g. The mass of the aluminum was actually 12.989g. Calculate the
percent error
12.12g-12.989g x 100 12.989g
= 6.7%
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Convert 875.2 dL to daL
• 8.752 daL
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A student measured the volume of an aluminum block three times and recorded the following
results: 6.42cm3, 6.41 cm3, and 6.40 cm3. The actual volume of the aluminum was 12.5 cm3. Comment on
the accuracy and precision of the data.
• The student was precise – all 3 measurements are close to one another.• The student was NOT accurate- she is about 6
cm3 from the actual measurement of 12.5 cm3
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________ is a property of matter representing the mass per unit volume
• Density
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Write the following in ordinary notation: 4.85 x 103
• 4,850
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_________ is the modernized form of the metric system used by scientists
• SI system