You will be able to convert numbers within the metric system. Objective You will be able to convert numbers within the metric system.

How many eggs are in 6 dozen? 12 Step 1: How many eggs are in 1 dozen? 72 Step 2: Multiple 12 times 6 dozen =

6 dozen x 12 eggs = 72 eggs 1 dozen

Metric System

Why use metric? 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.

UNITS – different types of measurement are UNITS – different types of measurement are used for different types of units. Mass – is measured using grams also written as g. Volume – is measured using liters also written as “l”. Multiplying their length, width, and height can solve 3-D objects. Distance – is measured in meters also written as m.

English vs. Metric Units 1 ounce of gold = 28,349.5 milligrams 100 kilogram = 220 pounds 1 pound = 453.6 grams 1 ounce of gold = 28,349.5 milligrams

kg Mass mg g cg 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)

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.

English vs. Metric Units 1 quart = 0.946 liters a 12-oz can of soda would equal approximately 355 ml. It would take approximately 3 ¾ 1-liter bottles to equal a gallon.

kl ml cl Volume 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 cm3 (or cc) = 1 gram*

1,000 cm3 = 1,000 ml = 1,000 g

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? 43 ml 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.

Measuring Solid Volume 10 cm 9 cm 8 cm We can measure the volume of regular object using the formula length x width x height. 10 8 9 720 cm3 _____ X _____ X _____ = _____ We can measure the volume of irregular object using water displacement. 200 ml Amount of H2O without object = ______ About of H2O with object = ______ Difference = Volume = ______ 265 ml 65 ml

English vs. Metric Units 1 yard = 0.9444 meters 1.6 kilometers 1 mile 1 inch = 2.54 centimeters

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)

1 centimeter = 10 millimeters Measuring Length How many millimeters are in 1 centimeter? 1 centimeter = 10 millimeters What is the length of the line in centimeters? _______cm What is the length of the line in millimeters? _______mm 2.8 28

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 2,350 124 432 8,535.6

Divide each of the following numbers by 10 230  10 = 4500  10 = 123.5  10 = 21.6  10 = 8.465  10 = 23 450 12.35 2.16 0.8465

Nice Job! If you can multiply & divide by 10 (or any power of 10), then the metric system will be easy for you.

How many jumps does it take? Ladder Method 1 2 3 KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit How 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 = _________ m Starting Point Ending Point How many jumps does it take? 3 4. 1 __. 2 __. 3 __. = 4000 m

The metric system deals with powers of 10 1 meter = 10 decimeters = 100 centimeters = 1000 millimeters

Unit we’re measuring in Unit we’re measuring in… The Metric System Let’s explore this. The Scale looks like this: King Henry’s dad drinks chocolate milk K H Da Unit we’re measuring in D C M K i L o H e c t D a Unit we’re measuring in… Let’s say: meters C n M l

Unit we’re measuring in The Metric System K H Da Unit we’re measuring in D C M Each time you convert, just move the decimal place. You only have to know TWO things: Where you are starting on the scale. Where you are going on the scale.

Unit we’re measuring in The Metric System K H Da Unit we’re measuring in D C M Try It: Convert: 123m to _______ cm Where is the decimal place? Where do you start on the SI Scale? Where do you want to go? Which way? Fill in the spaces with 0’s (zero’s) 589 dm to _______ km . 12,300 123.00 0.0589 5 8 9. .