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# Metric System

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### Metric System

1. 1. Objective <ul><li>You will be able to convert numbers within the metric system. </li></ul>
2. 2. How many eggs are in 6 dozen? Step 1: How many eggs are in 1 dozen? 12 Step 2: Multiple 12 times 6 dozen = 72
3. 3. 6 dozen x 12 eggs = 72 eggs 1 dozen
4. 4. Metric System
5. 5. Why use metric? <ul><li>Scientists use the metric system when making observations and taking measurements. The metric system is a form of measurement that scientists around the world use. This form of measurement is also known as the International System of Units, or (“SI”). This measurement system allows scientists to be as precise as possible when performing lab experiments. In science, everything must be exact. </li></ul>
6. 6. UNITS – different types of measurement are used for different types of units. <ul><li>Mass – is measured using grams also written as g . </li></ul><ul><li>Volume – is measured using liters also written as “ l ”. </li></ul><ul><ul><ul><li>Multiplying their length, width, and height can solve 3-D objects. </li></ul></ul></ul><ul><li>Distance – is measured in meters also written as m . </li></ul>
7. 7. English vs. Metric Units 100 kilogram = 220 pounds 1 ounce of gold = 28,349.5 milligrams 1 pound = 453.6 grams
8. 8. Mass kg g cg mg Mass refers to the amount of matter in an object. The base unit of mass in the metric system is the kilogram and is represented by kg . Metric Units 1 Kilogram (km) = 1000 Grams (g) 1 Gram (g) = 1000 Milligrams (mg)
9. 9. Measuring Mass We will be using triple-beam balances to find the mass of various objects. The objects are placed on the scale and then you move the weights on the beams until you get the lines on the right-side of the scale to match up.
10. 10. English vs. Metric Units a 12-oz can of soda would equal approximately 355 ml. It would take approximately 3 ¾ 1-liter bottles to equal a gallon. 1 quart = 0.946 liters
11. 11. Volume kl cl ml Volume is the amount of space an object takes up. The base unit of volume in the metric system is the liter and is represented by L or “l” . Standard: 1 liter is equal to one cubic decimeter Metric Units 1 liter (L) = 1000 milliliters (mL) 1 milliliter (mL) = 1 cm 3 (or cc) = 1 gram*
12. 12. 1,000 cm 3 = 1,000 ml = 1,000 g
13. 13. Measuring Volume We will be using graduated cylinders to find the volume of liquids and other objects. Read the measurement based on the bottom of the meniscus or curve. When using a real cylinder, make sure you are eye-level with the level of the water. What’s the volume of water in the cylinder? What 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. 43 ml
14. 14. Measuring Solid Volume We can measure the volume of regular object using the formula length x width x height . _____ X _____ X _____ = _____ We can measure the volume of irregular object using water displacement . Amount of H 2 O without object = ______ About of H 2 O with object = ______ Difference = Volume = ______ 720 cm 3 200 ml 265 ml 65 ml 10 8 9 10 cm 9 cm 8 cm
15. 15. English vs. Metric Units 1.6 kilometers 1 mile 1 yard = 0.9444 meters 1 inch = 2.54 centimeters
16. 16. Length km m cm mm Length refers to the distance from one point to another. The base unit of length in the metric system is the meter and is represented by m . Metric Units 1 Kilometer (km) = 1000 meters 1 Meter = 100 Centimeters (cm) 1 Meter = 1000 Millimeters (mm)
17. 17. Measuring Length How many millimeters are in 1 centimeter? What is the length of the line in centimeters? _______cm What is the length of the line in millimeters? _______mm 1 centimeter = 10 millimeters 2.8 28
18. 18. Multiply each of the following numbers by 10 15 x 10 = 235 x 10 = 12.4 x 10 = 43.2 x 10 = 853.56 x 10 = 150 2,350 124 8,535.6 432
19. 19. Divide each of the following numbers by 10 <ul><li>230  10 = </li></ul><ul><li>4500  10 = </li></ul><ul><li>123.5  10 = </li></ul><ul><li>21.6  10 = </li></ul><ul><li>8.465  10 = </li></ul>23 450 12.35 2.16 0.8465
20. 20. Nice Job! <ul><li>If you can multiply & divide by 10 (or any power of 10), then the metric system will be easy for you. </li></ul>
21. 21. KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit CENTI 0.01 Unit MILLI 0.001 Unit Ladder Method 4 km = _________ m How many jumps does it take? 4. = 4000 m 3 Meters Liters Grams How do you use the “ladder” method? 1 st – Determine your starting point. 2 nd – Count the “jumps” to your ending point. 3 rd – Move the decimal the same number of jumps in the same direction. 1 2 3 Starting Point Ending Point 1 __ . 2 __ . 3 __ .
22. 22. The metric system deals with powers of 10 <ul><li>1 meter = </li></ul><ul><li>10 decimeters = </li></ul><ul><li>100 centimeters = </li></ul><ul><li>1000 millimeters </li></ul>
23. 23. The Metric System <ul><li>Let’s explore this. The Scale looks like this: </li></ul>King Henry’s dad drinks chocolate milk M C D Unit we’re measuring in Da H K M i l l i C e n t i D e c i Unit we’re measuring in… Let’s say: meters D e c a H e c t o K i L o
24. 24. The Metric System <ul><li>Each time you convert , just move the decimal place. </li></ul><ul><li>You only have to know TWO things: </li></ul><ul><ul><li>Where you are starting on the scale. </li></ul></ul><ul><ul><li>Where you are going on the scale. </li></ul></ul>M C D Unit we’re measuring in Da H K
25. 25. The Metric System <ul><li>Try It: </li></ul><ul><li>Convert: 123m to _______ cm </li></ul><ul><ul><ul><ul><ul><li>Where is the decimal place? </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Where do you start on the SI Scale? </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Where do you want to go? </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Which way? </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Fill in the spaces with 0’s (zero’s) </li></ul></ul></ul></ul></ul><ul><li>589 dm to _______ km </li></ul>12,300 0.0589 123.00 . 5 8 9. . 0 M C D Unit we’re measuring in Da H K