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

Convert 865.3 g to dag

• 86.53 dag

_______________ measurement is a measurement that gives results in a

definite form, usually in numbers and units

• Quantitative

Convert 6,250mL to L

• 6.250 L

__________ shows how close a series of measurements are to one another

• Precision

Convert 425.2 km to m

• 425,200 m

What formula is used to calculate percent error?

Valueaccepted – Valueexperimental X 100

Valueaccepted

What is the density formula?

D = _M_ V

What is the abbreviation of a dekagram?

• dag

_________ is a measure of linear distance

• Length

______________ measurement is a measurement that gives descriptive,

NONnumeric results

• Qualitative

_________ is a measure of the gravitational pull on matter

• weight

Convert 78.6 s to ms

• 78,600 ms

_______ is a measure of the amount of space occupied by a sample of matter

• volume

Write the following in scientific notation: 458,600,000

• 4.586 x 108

The zinc was a solid, gray metal. What type of measurement is this (qualitative or quantitative)?

• qualitative

Describe the proper way to read a measurement from a graduated

cylinder.

• Eye level• Bottom of meniscus

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

The curvature of a liquid in a container because of surface tension is known as

the __________

• meniscus

List 2 units that density could be expressed in.

• Any mass/volume unit!• EX: g/mL, mg/L, g/cm3

_____ is a measure of the quantity of matter in a sample

• mass

What piece of lab equipment is used to measure mass?

• Scale/balance

_________________ shows how close a measurement comes to the true or accepted value of what is measured

• accuracy

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!

What piece of lab equipment is used to measure volume accurately?

• Graduated cylinder

The zinc had a mass of 58.3g. What type of measurement is this (qualitative or quantitative)?

• quantitative

What is the abbreviation of a centiliter?

• cL

What is the abbreviation of a cubic hectometer?

• hm3

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

Which unit is larger: centigram, milligram?

• centigram

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

Which unit is larger: meter, decimeter?

meter

Convert 2.6 hg to mg

• 260,000 mg

Write the following in ordinary notation: 5.23 x 10-4

• 0.000523

Write the following in ordinary notation: 6.49 x 10-2

• 0.0649

Write the following in scientific notation: 0.0000365

• 3.65 x 10-5

Which unit is larger: kilogram, milligram?

• Kilogram

Write the following in scientific notation: 8,642 x 108

• 8.642 x 1011

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.

Write the following in scientific notation: 0.0000065

• 6.5 x 10-6

Write the following in ordinary notation: 1.57 x 106

• 1,570,000

Which unit is larger: meter, hectometer?

hectometer

What is the abbreviation of a decigram?

• dg

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

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%

Convert 875.2 dL to daL

• 8.752 daL

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

________ is a property of matter representing the mass per unit volume

• Density

Write the following in ordinary notation: 4.85 x 103

• 4,850

_________ is the modernized form of the metric system used by scientists

• SI system