2 Practice sheet 1-4 evens only Go over homeworkTextbook page 22,problem evenshow all your workPractice sheet 1-4 evens only
3 1-5 Measuring in Metric Units 1971—Department of Commerce recommended the U.S. convert to metricToday—90% of world nations use metric system
4 Metric System A decimal system based on the number 10 All measurements are multiples of 10Standard rules for amounts of units through the use of prefixesUnits of measure have specific names
5 Units of Measurement Examples: Kilometer Hectometer Decameter Meter Prefixes and Multiplier:Kilo = 1000Hecto = 100Deca = 10Meter = 1Deci = .1Centi = .01Milli = .001Examples:KilometerHectometerDecameterMeterDecimeterCentimeterMillimeter
6 Metric System Units of Measure Meters represent length Grams represent mass or weightLiters or cubic meters represent volume or capacity
7 Length - standard unit is meter Abbreviations1 millimeter = 1 mm 1 dekameter = 1 dam 1 meter = 1 m 1 decimeter = 1 dm 1 kilometer = 1 km1 millimeter = meter 1 centimeter = 0.01 meter 1 decimeter = 0.1 meter 1 kilometer = 1000 meters
8 Length:1 meter is a little longer than 1 yard or 3 feet or doorknob to floor. It is about half the height of a very tall adult.1 Kilometer is about 11 football fields1centimeter is nearly the diameter of a dime, a little less than half an inch, or the width of your finger.A millimeter is about the thickness of a dime.
9 Capacity 1 liter is a little more than 1 quart. One teaspoon or a small spoon equals about 5 milliliters.
10 Mass 1 milligram is about the mass of a mosquito 1 gram is about the mass of a paper clip.1kilogram is about the mass of a liter of water or the mass of a bunch of bananas.
11 Reasonable Estimates How about the height of a classroom? 3 cm 3m 3kmHow about the mass of a bag of flour?2.3 mg 2.3g 2.3kgHow about the capacity of a soup bowl?180 mL 180L 180kLHow about the mass of a butterfly?500mg 500g 500kgHow about the length of a pencil?19mm 19cm 19m
12 How to remember different lengths in the metric system: When you think of a millimeter (mm) think of:The thickness of a dime.When you think of a centimeter (cm) think of:The width of your pinky.
13 How to remember different lengths in the metric system: When you think of a meter (m) think of:The height of the doorknob.When you think of a kilometer (km) think of:A little more than half of a mile
14 How to remember different volumes in the metric system: When you think of a liter (L) think of:About the size of a bottle of water.When you think of 5 milliliters (mL) think of:One teaspoonWhen you think of 2 kiloliters (kL) think of:A hot tub
15 How to remember different masses in the metric system: When you think of a gram (g) think of:A paper clipWhen you think of a kilogram (kg) think of:A little more than 2 pounds.
16 What is the order of the metric system? King Henry Died by Drinking Chocolate MilkKing: KiloHenry: HectoDied: DecaBy: Base (m, L, g)Drinking: DeciChocolate: CentiMilk: Milli
17 7th Grade Formula SheetKing Henry Died By Drinking Chocolate Milk
18 King Henry Died By Drinking Chocolate Milk Kilo (Thousand) Hecto- 100 (Hundred) Deka- 10 (Ten) Base – 1 (One) Deci- 0.1 (Tenths) Centi (Hundredths) Milli- (Thousandths)The “Trick” for converting using “King Henry”Start at the prefix of the unit you are starting with and count the times you move to get to the prefix you are converting to. Do not count the unit you started with. Move the decimal that many places and in the direction you counted (right or left).Example: 5m = 500 cm The decimal was moved two times to the right from the base unit of meter to cm.
19 1,000 thousand 1 one 3 places to right 7,000 1 one .01 hundredths 7 km = __________ m6 g = __________ cg9.15 kL = __________ L6.25 kg = __________ mg14.2 m = __________ cm7,0001 one.01 hundredths2 places to right6001,000 thousand1 one3 places to right9,1501,000 thousand.001 thousandths6,250,0006 places to right2 places to right1 one.01 hundredths1,420
20 .001 thousandths 1 one 3 places to left 0.014 1 one 1,000 thousand 14 mL = __________ L3.97 g = __________ kg915 L = __________ kL45 mg = __________ dag10 m = __________ dam1 one1,000 thousand3 places to left1one1,000 thousand3 places to left0.915.001 thousandths10 ten4 places to left0.00451 place to left1 one10 ten1
23 Multiplying to change units Change 245mL to LIt takes 1,000 mL to equal 1L, so times 245 by to change to liters24ml x = LChange 1.4g to mgIt takes 1,000 mg to equal 1g, so times 1.4 by to get mg1.4g x 1000 = 1,400mgChange 34L to mLIt takes 1,000 mL to equal 1L, so times 24 by to get mg34L x 1000 = 34,000mLChange 4,690g to kgIt takes 1,000g to equal 1kg, so times by .0014690g x = 4.690kg
24 10 millimeters = 1 centimeter mm cm 100 millimeters or 10 centimeters = 1 decimeter cm dm10 decimeters = 1 meterThe Length of the MatterMAT/TAP
25 1 meter is a little longer than 1 yard or 3 feet 1 meter is a little longer than 1 yard or 3 feet. It is about half the height of a very tall adult A centimeter is nearly the diameter of a dime, a little less than half an inch. A millimeter is about the thickness of a dime.The Length of the MatterMAT/TAP
26 The standard unit of length in the metric system is the meter. The numbers on a meter stick are called centimeters. The 10 lines between centimeter numbers are called millimeters. There are 100 centimeters and 1000 millimeters in a meter.10 millimeters = 1 centimeterMAT/TAPThe Length of the Matter
27 The meter is based on multiples of 10 The meter is based on multiples of 10. Each millimeter is a tenth of a centimeter. For example:the length of the red line is 7.5 or seven and five tenths centimeters.The Length of the MatterMAT/TAP
29 The standard unit of length in the metric system is the meterOther units of length and their equivalents in meters are as follows: 1 millimeter = meter 1 centimeter = 0.01 meter 1 decimeter = 0.1 meter 1 kilometer = 1000 metersWe abbreviate these lengths as follows: 1 millimeter = 1 mm 1 centimeter = 1 cm 1 meter = 1 m 1 decimeter = 1 dm 1 kilometer = 1 kmThe Length of the MatterMAT/TAP
30 Write the metric measurements shown below Write the metric measurements shown below. (don’t forget to label your answers)1.2.3.MAT/TAPThe Length of the MatterAnswers on next slide
31 4.5 cm1.9 cm2.6.5 cm3.MAT/TAPThe Length of the Matter
32 English to Metric Conversions 39,370 inches = 1 kilometerfeet = 1 kilometer.62 miles = 1 kilometer39 inches = 1 meter3.28 feet = 1 meter1 inch = 254 mm1 inch = 2.54 cm1 foot = cm1 yard = cm1 yard = .914 m1 mile = m1 mile = kmYou do not need to know these. They are just for you to get an idea of how these systems compare.