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Example 1 Convert: a) 5,000 mm = ____ m b) 1.7 kg = ____ g c) ____ ml = 6 cl Key points: If there is no decimal point, put one in. When moving the decimal point, add a zero if there is no number where you are moving to.

Conversion Factors 1 jerk = 13 snaps 1 snap = 6.6 crackles 1 crackle = 1000 pops

Example 2 Convert: a) 50 jerks to snaps (1 step) b) 9000 pops to snaps (2 steps) c) 250 crackles to jerks (2 steps)

Length Conversion Factors 1 inch = 2.54 cm 1 ft. = 12 in. 1 mile = 1600 m 1 mile = 5280 ft. 1 yard = 3 ft.

Time Conversion Factors 1 min = 60 sec 1 hr = 60 min 1 day = 24 hr. 1 year = 365 days

Example 3 Convert: a) 3 feet to centimeters (2 step) b) 1 day to seconds (3 steps)

Brain Break

Example 3 Converting rates

Scientific Notation The internationally recognized way of communicating values in science Exponent tells number of zeros

Follow same rules as Metric Conversion If there is no decimal point, put one in. When moving the decimal point, add a zero if there is no number where you are moving to.

Examples How many and in what direction: Remember: If there is no decimal point, put one in. When moving the decimal point, add a zero if there is no number where you are moving to. How many and in what direction: Write without scientific notation: = __________ = _________ 12

Now, do it backwards To write a number in scientific notation Place a decimal if there isn’t one already Move the decimal to the left or right until there is only one number in front of (or to the left of) the decimal place Count the number of times you moved Write that number as the exponent of the 10 If you moved right, make exponent negative If you moved left, make it positive NOTE: It’s the reverse of writing without scientific notation 13

Examples How many and in what direction: 3,600 0.0058 Write the Following in scientific notation: 65,000 = ____________ 0.015 = _____________ 25 = _______________ 14