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Bellringer

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**Practice sheet 1-4 evens only**

Go over homework Textbook page 22, problem even show all your work Practice sheet 1-4 evens only

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**1-5 Measuring in Metric Units**

1971—Department of Commerce recommended the U.S. convert to metric Today—90% of world nations use metric system

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**Metric System A decimal system based on the number 10**

All measurements are multiples of 10 Standard rules for amounts of units through the use of prefixes Units of measure have specific names

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**Units of Measurement Examples: Kilometer Hectometer Decameter Meter**

Prefixes and Multiplier: Kilo = 1000 Hecto = 100 Deca = 10 Meter = 1 Deci = .1 Centi = .01 Milli = .001 Examples: Kilometer Hectometer Decameter Meter Decimeter Centimeter Millimeter

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**Metric System Units of Measure Meters represent length**

Grams represent mass or weight Liters or cubic meters represent volume or capacity

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**Length - standard unit is meter**

Abbreviations 1 millimeter = 1 mm 1 dekameter = 1 dam 1 meter = 1 m 1 decimeter = 1 dm 1 kilometer = 1 km 1 millimeter = meter 1 centimeter = 0.01 meter 1 decimeter = 0.1 meter 1 kilometer = 1000 meters

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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 fields 1centimeter 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.

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**Capacity 1 liter is a little more than 1 quart.**

One teaspoon or a small spoon equals about 5 milliliters.

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**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.

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**Reasonable Estimates How about the height of a classroom?**

3 cm 3m 3km How about the mass of a bag of flour? 2.3 mg 2.3g 2.3kg How about the capacity of a soup bowl? 180 mL 180L 180kL How about the mass of a butterfly? 500mg 500g 500kg How about the length of a pencil? 19mm 19cm 19m

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**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.

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**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

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**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 teaspoon When you think of 2 kiloliters (kL) think of: A hot tub

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**How to remember different masses in the metric system:**

When you think of a gram (g) think of: A paper clip When you think of a kilogram (kg) think of: A little more than 2 pounds.

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**What is the order of the metric system?**

King Henry Died by Drinking Chocolate Milk King: Kilo Henry: Hecto Died: Deca By: Base (m, L, g) Drinking: Deci Chocolate: Centi Milk: Milli

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7th Grade Formula Sheet King Henry Died By Drinking Chocolate Milk

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**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.

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**1,000 thousand 1 one 3 places to right 7,000 1 one .01 hundredths**

7 km = __________ m 6 g = __________ cg 9.15 kL = __________ L 6.25 kg = __________ mg 14.2 m = __________ cm 7,000 1 one .01 hundredths 2 places to right 600 1,000 thousand 1 one 3 places to right 9,150 1,000 thousand .001 thousandths 6,250,000 6 places to right 2 places to right 1 one .01 hundredths 1,420

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**.001 thousandths 1 one 3 places to left 0.014 1 one 1,000 thousand**

14 mL = __________ L 3.97 g = __________ kg 915 L = __________ kL 45 mg = __________ dag 10 m = __________ dam 1 one 1,000 thousand 3 places to left 1one 1,000 thousand 3 places to left 0.915 .001 thousandths 10 ten 4 places to left 0.0045 1 place to left 1 one 10 ten 1

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**12.) Liter =1 one; mL=.001 thousandths**

Homework Time 12.) Liter =1 one; mL=.001 thousandths Then write answer

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**Multiplying to change units**

Change 245mL to L It takes 1,000 mL to equal 1L, so times 245 by to change to liters 24ml x = L Change 1.4g to mg It takes 1,000 mg to equal 1g, so times 1.4 by to get mg 1.4g x 1000 = 1,400mg Change 34L to mL It takes 1,000 mL to equal 1L, so times 24 by to get mg 34L x 1000 = 34,000mL Change 4,690g to kg It takes 1,000g to equal 1kg, so times by .001 4690g x = 4.690kg

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**10 millimeters = 1 centimeter mm cm**

100 millimeters or 10 centimeters = 1 decimeter cm dm 10 decimeters = 1 meter The Length of the Matter MAT/TAP

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**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 Matter MAT/TAP

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**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 centimeter MAT/TAP The Length of the Matter

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**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 Matter MAT/TAP

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**The Length of the Matter**

MAT/TAP

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**The standard unit of length in the metric system is**

the meter Other 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 meters We abbreviate these lengths as follows: 1 millimeter = 1 mm 1 centimeter = 1 cm 1 meter = 1 m 1 decimeter = 1 dm 1 kilometer = 1 km The Length of the Matter MAT/TAP

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**Write the metric measurements shown below**

Write the metric measurements shown below. (don’t forget to label your answers) 1. 2. 3. MAT/TAP The Length of the Matter Answers on next slide

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4.5 cm 1. 9 cm 2. 6.5 cm 3. MAT/TAP The Length of the Matter

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**English to Metric Conversions**

39,370 inches = 1 kilometer feet = 1 kilometer .62 miles = 1 kilometer 39 inches = 1 meter 3.28 feet = 1 meter 1 inch = 254 mm 1 inch = 2.54 cm 1 foot = cm 1 yard = cm 1 yard = .914 m 1 mile = m 1 mile = km You do not need to know these. They are just for you to get an idea of how these systems compare.

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**Metric Conversion Steps**

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