science starter! be seated in assigned seat before the bell rings, with desk clear of anything...
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Science Starter!
Be seated in assigned seat before the bell rings, with desk clear of anything
except your binder, pen/pencil, calculator and signed syllabus/lab
safety contract.
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Mathematics Review
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Scientific Notation
a.bc X 10 d
ALWAYS in the same format!
NEVER:
ab.c X 10 d
0.abc X 10 d
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Writing in Scientific Notation
143,000,000,000.
Move decimal left or right until there is ONE digit in the one’s place. Count the spaces moved:
1.43000000000 [11 spaces]
Write the number as a decimal, and use the number of spaces moved as the exponent
[ Positive if the number is larger than 1, Negative if the number is a decimal ]
1.43 x10 11
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Example 1: 0.000000056
Example 2: 537.0
Example 3: 0.50
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Example
980 nm 1.Identify the prefix and the unit
“n”: nano “m”: meter2.Scientific notation form: replace prefix with multiplier.
980 x 10-9 m3.Expanded form
0.000000980 m
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PrefixesLetters used to represent powers of 10:
Prefix Symbol Multiplier
nano - n 10-9 0.000000001micro - μ 10-6 0.000001milli - m 10-3 0.001
centi - c 10-2 0.01kilo - k 103 1,000
mega - M 106 1,000,000
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Conversions
Factor-Label Method tips:
1.Write the quantity you are given.2.Next to your “given”, write the conversion
factor as a fraction, with the same unit that is in the “given” on the bottom.
3. Multiply across the top and the bottom, then simplify.
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Conversion FactorsMetric / English
1 yard = 3 ft1 ft = 12 in
1 mi = 5,280 ft1 in = 2.54 cm 1 m = 3.281 ft
Metric / Metric
1,000,000,000 nm = 1 m1,000,000 μm = 1 m
1,000 mm = 1m100 cm = 1 m
1,000 m = 1 km
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Ex: How many centimeters are in 5.5 ft?
(1)
(2)
(3)
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Try These:
1)560 ft m
2)25 km in
3)6 cm yards
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Dimensional AnalysisEx. Convert 20 m/s to ft/min.
1) Write the “given” as a fraction:
2) Convert the distance to the right:
3) Convert the time to the left:
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4) Multiply across the top and bottom:
5) Simplify your answer:
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Try These…
1) 50 mi/hr ft/min
2) 10 m/s mi/hr
3) 5 m/s mi/hr
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1)
2)
3)