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24 Cards in this Set
- Front
- Back
- 3rd side (hint)
What is the term for a tentative proposal of a scientific principle that attempts to explain the meaning of a set of data collected in an experiment?
a. estimation b. hypothesis c. natural law d. theory e. none of the above |
b - Hypothesis
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Who is generally considered to be the founder of the scientific method?
a. Aristotle b. Robert Boyle c. John Dalton d. Antoine Lavoisier e. none of the above |
b - Robert Boyle
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What question can we ask in order to distinguish between a theory and a law?
a. Does the statement concern atoms? b. Does the statement concern gases? c. Is the statement comprehensible? d. Is the statement measurable? e. none of the above |
D - Is the statement measurable?
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Who is generally considered to be the founder of modern chemistry?
a. Aristotle b. Robert Boyle c. John Dalton d. Antoine Lavoisier e. none of the above |
D - Antoine Lavoisier
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What is the term for the digits in a measurement that exceed the certainty of the instrument?
a. inexact digits b. nonsignificant digits c. significant digits d. uncertain digits e. none of the above |
B - Nonsignificant digits
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What is the term for a method of expressing a value by placing a decimal after the first significant digit and indicating the magnitude using a power of 10?
a. calculator notation b. engineering notation c. fixed decimal notation d. scientific notation e. none of the above |
D - Scientific Notation
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What is the term for the inexactness of an instrumental measurement?
a. accuracy b. error c. precision d. uncertainty e. none of the above |
D - Uncertainty
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Which of the following quantities can be measured exactly?
a. length b. mass c. volume d. time e. none of the above |
E - none of the above
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How many significant digits are in the length measurement 100.60 centimeters?
a. 1 b. 2 c. 3 d. 4 e. none of the above |
E - none of the above
... The first two zeros are between significant figures and the last zero is to the right of a decimal and after a figure. |
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How many significant digits are in the length measurement 61,000 centimeters?
a. 2 b. 3 c. 4 d. 5 e. none of the above |
a - 2
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Round off the following measurement to three significant digits: 1255 g.
a. 125 g b. 126 g c. 130 g d. 1250 g e. 1260 g |
E - 1260 g
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Add 7.77 g to 11.666 g and round off the answer.
a. 19.0 g b. 19.4 g c. 19.43 g d. 19.44 g e. 19.436 g |
D - 19.44 g
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The rules of addition state that the answer must reflect the figures in the problem to the 10ths or 100ths. So this case the 7.77 g is to the 100ths place therefore the answer must reflect that unlike mulitiplication.
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Multiply 2.505 m by 1.75 m by 1.0 m and round off the answer.
a. 4 m3 b. 4.4 m3 c. 4.38 m3 d. 4.384 m3 e. 4.0 m3 |
B - 4.4 m3
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Answer must be rounded to the nearest 10th like 1.0 m listed in problem.
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Express 0.000 000 000 000 1 in exponential form.
a. 1 10–13 b. 1 10–12 c. 1 10–1 d. 1 1013 e. none of the above |
a. 1 x 10–13
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Express the exponential number 6.26 x 10 to the 3rd as an ordinary number.
a. 0.006 26 b. 0.000 626 c. 6,260 d. 62,600 e. none of the above |
c. 6,260
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Which of the following unit factors is derived from: 1 mile = 1760 yards?
a. 1 mile /1 yard b. 1 mile /1760 yards c. 1 yard/1760 miles d. 1760 miles/1 yard e. 1760 miles/1760 yards |
b. 1 mile /1760 yards
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If a marathon race is 26.2 miles, what is the distance in kilometers?
(Given: 1 mile = 1.61 kilometer) a. 0.0615 kilometer b. 16.3 kilometers c. 42.2 kilometers d. 61.5 kilometers e. 42,200 kilometers |
c. 42.2 kilometers
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If the mass of Mars is 6.42 1023 kilograms, what is the mass in metric tons?
(Given: 1 metric ton = 1000 kilograms) a. 1.55 10–25 metric tons b. 1.55 10–21 metric tons c. 6.42 1017 metric tons d. 6.42 1020 metric tons e. 6.42 1026 metric tons |
d. 6.42 x 1020 metric tons
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A sample of rose gold is: 12.0 grams gold, 5.0 grams silver, and 7.0 grams copper by mass. What is the percent of copper in the sample?
a. 12% b. 29% c. 50% d. 58% e. 75% |
b. 29%
put the 7 g over the ADDED total on bottom 7/24 x 100 = 29.1666666 = 29% |
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If a 5¢ coin has a mass of 5.07 g and is 75.0% copper, what is the mass of nickel in the 5¢ coin?
a. 0.203 g b. 0.676 g c. 1.27 g d. 1.69 g e. 3.80 g |
e. 3.80 g
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Take the total (5.07g) over 1 times 75/100 (75% of 100%).
So 5.07 times 75 divided by 100 equals 3.78 g = 3.80 because it must be rounded to three significant figures. |
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A ruby gemstone contains 52.7% aluminum, 47.1% oxygen, and small traces of chromium. If the ruby was found to contain 0.125 g of aluminum, what is the mass of the gemstone?
a. 0.0659 g b. 0.125 g c. 0.237 g d. 0.265 g e. 0.625 g |
c. 0.237 g
The problem is giving more info. than needed. Simple take the amount of Aluminum .125 g and times it by 100 % (parts) over it's percentage of 52.7 g/al. The simple answer being .237 |
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What is the average speed in feet per second of a world-class swimmer who
swims a 400.0-m freestyle race in 3 min, 49.05 s? (Given: 1 m = 3.281 ft.) a. 0.5323 ft/s b. 1.746 ft/s c. 5.730 ft/s d. 114.6 ft/s e. 376.0 ft/s |
c. 5.730 ft/s
c. 5.730 ft/s 400/1 x 3.281 ft/1 = 1312.4 Convert 3 minutes into seconds so 180 seconds plus 49.05 = 229.05 seconds. Then 1312.4 ft/229.05 = 5.730 ft/s |
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Calculate the volume of Earth assuming it is spherical and has a radius (r) of
6370 km. The volume of a sphere equals 4(pie)r3/3, where (pie) is the constant 3.14. So = 4(3.14) (6370km)3 and all of that over /3 a. 2.58 1011 km3 b. 3.45 1011 km3 c. 6.37 1011 km3 d. 1.03 1012 km3 e. 1.08 1012 km3 |
e. 1.08 x 1012 km3
4(3.14) (6370km)3 / 3 = 1.08 x 1012 km3 |
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How many significant digits are justified by the unit equation 1 yard = 3 feet?
a. 1 b. 2 c. 3 d. infinite e. impossible to determine |
d. infinite
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