Presentation on theme: "The Metric System Take out a sheet of paper and pen or pencil."— Presentation transcript:
1 The Metric System Take out a sheet of paper and pen or pencil. Title your paper “Metric System Notes”Copy only the portion of the powerpoint that is written in red.
2 What is the Metric System? The metric system is a system of measurement which was developed over many years, and traces its origin to a 1585 book entitled "The Tenth", by Simon Stevin, who suggested that a decimal system be used for weights and measures.
3 The Metric SystemMetric System is a common language of measurement in science used all over the world.
4 The Metric SystemThe US Congress amended the Metric Conversion Act of 1975 and designated the metric system as the preferred system of weights and measures for United States trade and commerce.
5 The Metric SystemToday, some business and technology companies in the USA use the metric system, and many products specify both .But most people have decided that the inconvenience of switching outweighs the benefits.
6 The Metric System Map of Nations that don't use The Metric System All countries colored in red choose not to use the metric system as their system of weights and measurements.Myanmar (Burma)LiberiaThe United States
7 The Metric System The Metric System is … - based on 10 - based on only three units of measure: the meter, liter, and gram
8 The Metric SystemMeter-distance (instead of inch, foot, yard, or mile)Liter-volume of liquids (instead of ounce, cup, pint, quart, & gallon)Gram-mass (“weight”) (instead of ounces, pounds, and tons)
9 The Metric SystemPrefixes are used to convert to smaller or larger units.Prefixes are the same for liters, grams, and meters.milli /1000 or .001centi /100 or .01kilo ,0001 meter = 100 centimeters1 meter = 1000 millimeters1 kilometer= 1000 meters
10 T. Trimpe 2008 http://sciencespot.net/ Lesson 1: LengthT. Trimpe
11 English vs. Metric Units Which is longer?A. 1 mile or 1 kilometerB. 1 yard or 1 meterC. 1 inch or 1 centimeter1.6 kilometers1 mile1 yard = meters1 inch = 2.54 centimetersLeft Image: Right Image:
12 Metric UnitskmmcmmmThe basic unit of length in the metric system in the meter and is represented by a lowercase m.Standard: The distance traveled by light in absolute vacuum in 1⁄299,792,458 of a second.Metric Units1 Kilometer (km) = 1000 meters1 Meter = 100 Centimeters (cm)1 Meter = 1000 Millimeters (mm)Which is larger?A. 1 meter or 105 centimetersB. 4 kilometers or 4400 metersC. 12 centimeters or 102 millimetersD millimeters or 1 meter
13 Measuring Length How many millimeters are in 1 centimeter? 1 centimeter = 10 millimetersHow many millimeters are in 1 centimeter?What is the length of the line in centimeters? _______cmWhat is the length of the line in millimeters? _______mmWhat is the length of the line to the nearest centimeter? ________cmHINT: Round to the nearest centimeter – no decimals.Ruler:
14 T. Trimpe 2008 http://sciencespot.net/ Lesson 2: MassT. Trimpe
15 English vs. Metric Units 1 pound = gramsWhich is larger?1. 1 Pound or 100 Grams2. 1 Kilogram or 1 Pound3. 1 Ounce or 1000 Milligrams100 kilogram = 220 pounds1 ounce of gold = 28,349.5 milligrams
16 Kilogram Prototype Image - http://en.wikipedia.org/wiki/Kilogram Metric UnitskggcgmgMass refers to the amount of matter in an object.The base unit of mass in the metric system is the gram and is represented by g. Since a gram is so small, we usually use kilograms, represented by kg.Standard: 1 kilogram is equal to the mass of the International Prototype Kilogram (IPK), a platinum-iridium cylinder kept by the BIPM at Sèvres, France.Kilogram PrototypeMetric Units1 Kilogram (kg) = 1000 Grams (g)1 Gram (g) = 1000 Milligrams (mg)Which is larger?A. 1 kilogram or 1500 gramsB milligrams or 1 gramC. 12 milligrams or 12 kilogramsD. 4 kilograms or 4500 gramsKilogram Prototype Image -
17 Measuring MassFind the mass by weighing the object on the digital scale.Or, find the mass by using the balance.
18 Using a balance Place the object in one tray. Add the heaviest weight in the other. If it tips, add the next heaviest weight.Continue adding weights until the scale balances.Add all the weights up. The total is the weight of the object.
19 T. Trimpe 2008 http://sciencespot.net/ Lesson 3: VolumeT. Trimpe
20 English vs. Metric Units Which is larger?A. 1 liter or 1 gallonB. 1 liter or 1 quartC. 1 milliliter or 1 fluid ounce1 fl oz = ml1 12-oz can of soda would equal approximately 355 ml.1 gallon = 3.79 litersIt would take approximately 3 ¾ 1-liter bottles to equal a gallon.1 quart = liters
21 Metric UnitskLcLmLLVolume is the amount of space an object takes up.The base unit of volume in the metric system in the liter and is represented by L or l.Standard: 1 liter is equal to one cubic decimeterMetric Units1 liter (L) = 1000 milliliters (mL)1 milliliter (mL) = 1 cm3 (or cc) = 1 gram*Which is larger?A. 1 liter or 1500 millilitersB. 200 milliliters or 1.2 litersC. 12 cm3 or 1.2 milliliters** When referring to water Liter Image:
22 Measuring VolumeWe use graduated cylinders to find the volume of liquids and other objects.Read the measurement based on the bottom of the meniscus (the curve). When using a real cylinder, make sure you are eye-level with the level of the water.What is the volume of water in the cylinder? _____mLWhat causes the meniscus?A concave meniscus occurs when the molecules of the liquid attract those of the container. The glass attracts the water on the sides.Top Image: Bottom Image:
23 Measuring Liquid Volume What is the volume of water in each cylinder?Images created atABCPay attention to the scales for each cylinder.
24 Measuring Solid Volume 10 cm9 cm8 cmWe measure the volume of regular object using the formula length x width x height._____ X _____ X _____ = _____We measure the volume of irregular object using water displacement.Amount of H2O with object = ______ About of H2O without object = ______ Difference = Volume = ______Click here for an online activity about volume. Choose Lessons Volume & Displacement
26 How many jumps does it take? Ladder Method123KILO 1000 UnitsHECTO 100 UnitsDEKA 10 UnitsDECI 0.1 UnitMeters Liters GramsCENTI 0.01 UnitMILLI UnitHow do you use the “ladder” method?1st – Determine your starting point.2nd – Count the “jumps” to your ending point.3rd – Move the decimal the same number of jumps in the same direction.4 km = _________ mStarting PointEnding PointHow many jumps does it take?4.1__.2__.3__.= 4000 m
27 Conversion Practice Try these conversions using the ladder method. 1000 mg = _______ g 1 L = _______ mL 160 cm = _______ mm14 km = _______ m 109 g = _______ kg 250 m = _______ kmCompare using <, >, or =.56 cm m 7 g mg