Measurement & Problem Solving Review Kilo- 1,000 Hecto- 100 Deka- 10 Base Unit m, L, g,s Deci- 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 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,s Deci- 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)?
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 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?
Aluminum has a density of 2. 669g/mL 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?
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?
Write the following in scientific notation: 8,642 x 108
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?
What is the abbreviation of a decigram? dg
Aluminum has a density of 2. 669g/mL 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 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
The student was precise – all 3 measurements are close to one another. 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