1. Bellringer

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

3. 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

4. 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

5. 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

6. Metric System Units of Measure Meters represent length
Grams represent mass or weight
Liters or cubic meters represent volume or capacity

7. 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

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 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.

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 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

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

17. 7th Grade Formula Sheet
King 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 = __________ 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

20. .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

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

23. 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

24. 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

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 Matter
MAT/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 centimeter
MAT/TAP
The 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 Matter
MAT/TAP

28. The Length of the Matter
MAT/TAP

29. 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

30. 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

31. 4.5 cm 1.
9 cm 2.
6.5 cm 3.
MAT/TAP
The Length of the Matter

32. 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.

33. Metric Conversion Steps