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.

Mathematics Review

Scientific Notation a.bc X 10 d ALWAYS in the same format! NEVER: ab.c X 10 d 0.abc X 10 d

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: [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

Example 1: Example 2: Example 3:0.50

Example 980 nm 1.Identify the prefix and the unit “n”: nano“m”: meter 2.Scientific notation form: replace prefix with multiplier. 980 x m 3.Expanded form m

Prefixes Letters used to represent powers of 10: PrefixSymbolMultiplier nano -n micro -μ milli -m centi -c kilo -k10 3 1,000 mega -M10 6 1,000,000

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.

Conversion Factors Metric / English 1 yard = 3 ft 1 ft = 12 in 1 mi = 5,280 ft 1 in = 2.54 cm 1 m = ft Metric / Metric 1,000,000,000 nm = 1 m 1,000,000 μm = 1 m 1,000 mm = 1m 100 cm = 1 m 1,000 m = 1 km

Ex: How many centimeters are in 5.5 ft? (1) (2) (3)

Try These: 1)560 ft  m 2)25 km  in 3)6 cm  yards

Dimensional Analysis Ex. 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:

4) Multiply across the top and bottom: 5) Simplify your answer:

Try These… 1)50 mi/hr  ft/min 2) 10 m/s  mi/hr 3) 5 m/s  mi/hr

1) 2) 3)