-- OR – Learning how to measure “CORRECTLY”

Parts of Measurement Every measurement has two parts: a number a UNIT ** Without a unit – your answer is _________!!!!!!! NAKED You have naked numbers??? Oh, the horror!

Systems of Measurement We use: the _________ System English Length: _______, ______ and _______ inchesfeetmiles Volume: _______ and ________ cupsgallons Weight: ________ and ________ pounds ounces Scientific Standard: the ________ System Metric Length: _______ (___________ & ___________ ) meters centimetersmillimeters Volume: _______ (____________) litersmilliliters Mass: _______ (___________ & ___________) grams milligrams kilograms

Units of Length Basic unit is the _______ meter Our rulers have TWO sides – one is ENGLISH and one is METRIC! ALWAYS use the METRIC side!!!!

Length Abbreviations Meter = m Kilometer = km Centimeter = cm Millimeter = mm

Units of Volume Measured using a ________________ The liquid will look “curved” in the cylinder – this is called a _________. Read the level of the liquid from the _________ of the meniscus! Basic unit is the _______ meniscus graduated cylinder BOTTOM LITER (L)

Volume Abbreviations Liter = L Milliliter = ml

Units of Mass Measured using a _______ or _________ Larger masses are measured in __________, smaller masses in ___________ Basic unit is the _______GRAM (G) scalebalance kilograms milligrams

Mass Abbreviations Milligram = mg Gram = g Kilogram = kg Metric ton = t

Metric Conversions The Metric system is based on _____10’s (This makes it LOTS easier!) To convert from one metric unit to another, either _______ or ______ by 10. multiply divide Or – move the decimal place to the ______ or the ______ the correct number of places. rightleft

Metric Conversions Here’s a handy chart to help you with your metric conversions: kilo-hecto-Deca- mlgmlg deci-centi-milli- Basic Unit

Metric Conversions How to use the chart: 1. Find your starting unit 2. Find your ending unit 3. Move your decimal point the same number of ‘hops’ in the same direction 4. Change your units

Example: Convert 5 milligrams to grams kilo- (k) hecto- (h) Deca- (D) mlgmlg deci- (d) centi- (c) milli- (m) Start hereEnd here We take 3 ‘hops’ to the left, so we move the decimal point 3 places to the left.

5 milligrams Example: milligrams becomes __________ grams

Example 2: Convert 0.8 L to deciliters. kilo-hecto-Deca- mlgmlg deci-centi-milli- Start hereEnd here We take 1 ‘hop’ to the right, so we move the decimal point 1 place to the right.

0.8 L Example 2:. 0.8 liters becomes __________ 8 dL

Remember! 1. If the number doesn’t have a decimal point to start with – it’s _____ the number! after (56 ml is really 56.0 ml) 2. If the decimal point is at the beginning of the number, remember to put a _____ in ______of the decimal point! zero front (.345 cm should be written as cm) 3. All numbers need ______! (We will have no _______ numbers in Science!!) units naked