Science 8 Bellwork: Tuesday 9/1/09

1
Science 8 Bellwork Tuesday 9/1/09

• Reminder (Do in this order! ?)
• Get your Bellwork from the table as you enter
• Place your homework in a pile in the center of
  your table
• Write your objective/homework in your Agenda
• Begin your Bellwork
• Bellwork Questions
• How many inches are in 1 foot?
• How many feet are in 1 mile?
• Do these values make sense or have any patterns
  in them that help you remember their order?

2
How easy is this???

• Converting Standard Measurements

• There has to be a better way

3
Using the Metric System

• S.I. units are so easy to work with because they
  are based on multiples of 10!

4
In The Metric System

• There is one basic unit for
• Length (meter)
• Volume (liter)
• Mass (gram)
• Each smaller unit is easy to convert to the
  larger unit and vice versa!
• This chart can be used for each of the basic
  units
• The values do not change for liters
• Or Grams!

5
Using the Metric System is easy!!!

• To simplify things, very large and very small
  objects are expressed as multiples of ten of the
  base unit
• For exampleThe Nile River is 6,650,000 meters
  long, or 6,650 thousand meters long
• Instead of saying this, insert the prefix "kilo"
  (meaning 1,000) to the base unit "meter" to give
  us 6,650 kilometers
• Metric prefixes can be used with any base unit
• For example
• A kilometer is 1,000 meters
• A kilogram is 1,000 grams
• A kiloliter is 1,000 liters

6
Using the Metric System is easy!!!

• Base the subunit you use on whichever is closest
  to the size of the object you are measuring
• It wouldn't make sense to measure your weight in
  grams for the same reason that you wouldn't
  measure it in ounces - the unit is too small
• You would express your weight in a unit that
  makes sense, in this case kilograms, because 1
  kilogram is equal to 1000 grams
• (1 kilogram 2.2 lbs)

1 kilogram
1000 grams
They are the same!
7
How do I do it?

• The metric system is a called a decimal-based
  system because it is based on multiples of ten
• Six common prefixes used in the metric system are
  listed as follows

8
NOTES The Metric Ladder Metric Prefixes

• Step 1 Determine if you are converting to a
  larger or smaller unit.
• Going up the ladder ? move decimal left (1 cm
  0.1 dm)
• Going down the ladder ? move the decimal right (1
  cm 10 mm)
• Step 2 Decide how many spaces up or down the
  ladder you need to move.
• Step 3 Move your decimal point that many spaces.

9
Moving to the Right
Practice Problem How many centimeters are in 1
meter? Step 1 You know the larger unit (meters).
You dont know the smaller unit (centimeters).
This means you will be converting to a smaller
unit. (Move the decimal point to the right) Step
2 Looking at the ladder, you see that from the
centimeter ? meter there are 2 steps, or 2
decimal points. Step 3 Move your decimal point 2
place values (1.000 meters ? 10.00 decimeter ?
100.0 centimeters) Therefore, 1 meter 100
centimeters.
10
Moving to the Left

• Practice Problem How many meters are in 1
  centimeter?
• Step 1 You know the smaller unit (centimeters).
  You dont know the larger unit (meters). This
  means you will be converting to a larger
  unit.(Move the decimal point to the left)
• Step 2 Looking at the ladder, you see that
  there are 2 steps, or 2 decimal points, from the
  centimeter to the meter.
• Step 3 Move your decimal point 2 place values
  (1.0 ? 0.1 ? 0.01)
• Therefore, 1 centimeter 0.01 meters

11
Homework Problems

• How many meters are in 1 kilometer?
• How many dekagrams are in 1 gram?
• How many grams are in a dekagram?
• How many liters are in a deciliter?
• Questions to ask yourself
• Are you going to a smaller or larger unit?
• Which way will you move the decimal?
  (smaller-right larger-left)
• How many spaces do I move? (Use the Metric Ladder
  to help)

12
Accelerated Bellwork Wednesday 9/2/09

• Reminder (Do in this order! ?)
• Get your Bellwork from the table as you enter
• Place your homework in a pile in the center of
  your table
• Write your objective/homework in your Agenda
• Begin your Bellwork
• Solve the following conversions
• 75 meters _____ centimeters
• 30 centimeters _____ millimeters
• 10 meters _____ hectometers
• 150 centimeters _____ meters
• 5 hectometers _____ kilometers

13
Accelerated Solutions

• 75 meters 7500 centimeters
• 30 centimeters 300 millimeters
• 10 meters 0.1 hectometers
• 150 centimeters 1.5 meters
• 5 hectometers 0.5 kilometers

14
Science 8 BellworkWednesday 9/2/09

• Reminder (Do in this order! ?)
• Get your Bellwork from the table as you enter
• Place your homework in a pile in the center of
  your table
• Write your objective/homework in your Agenda
• Begin your Bellwork
• Solve the following conversion problems
• 1 meter _____ centimeters
• 5 meters _____ millimeters
• 10 meters _____ hectometers
• 2 kilometers _____ meters
• 6000 meters _____ kilometers

15
Science 8 Solutions

• 1 meter 100 centimeters
• 5 meters 5000 millimeters
• 10 meters 0.1 hectometers
• 2 kilometers 2000 meters
• 6000 meters 6 kilometers

16
Homework Answers

• How many meters are in 1 kilometer?
• 1 kilometer ? 1000 meters
• How many dekagrams are in 1 gram?
• 1 gram ? 0.1 dekagrams
• How many grams are in a dekagram?
• 1 dekagram ? 10 grams
• How many liters are in a deciliter?
• 1 liter ? 0.1 deciliters

17
How Can I Remember the Order of the Metric
System?Try a Metric Ladder Mnemonic!

• Kittens
• Hate
• Dogs
• BECAUSE
• Dogs
• Cant
• Meow

• Kilo-
• Hecto-
• Deca-
• BASIC UNIT
• Deci-
• Centi-
• Milli-

• Other mnemonics
• Kids have dropped over dead converting metrics
• King Hector died by drinking chocolate milk

18
Further Practice Problems

• 5.6 kg ____ g
• 2000 L _____ ml
• 60.2 dam _____ dm
• 7,100 m _____ km

• Questions to ask yourself
• Are you going to a smaller or larger unit?
• Which way will you move the decimal?
  (smaller-right larger-left)
• How many spaces do I move? (Use the Metric Ladder
  to help)

19
Answers

• 5.6 kg 5,600 g
• 2000 L 2,000,000,000 ml
• 60.2 dam 6,020 dm
• 7100 m 7.1 km

20
Practice Problems

• Use the next 10-15 minutes to complete the Metric
  Conversion worksheets

21
Metric Mania!

• This relay game will help you practice your
  conversion skills
• Everyone must participate!
• How to Play
• When it is your turn, you will come to the front
  of the classroom and grab a card
• When you correctly convert the units, write the
  answer on the board, and if you are correct, you
  may return to your seat and send up the next
  member of your team
• The first team to complete all of the conversions
  WINS!