Title: Science 8 Bellwork: Tuesday 9/1/09
1Science 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?
2How easy is this???
- Converting Standard Measurements
- There has to be a better way
3Using the Metric System
- S.I. units are so easy to work with because they
are based on multiples of 10!
4In 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!
5Using 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
6Using 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!
7How 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
8NOTES 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.
9Moving 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.
10Moving 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
11Homework 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)
12Accelerated 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
13Accelerated Solutions
- 75 meters 7500 centimeters
- 30 centimeters 300 millimeters
- 10 meters 0.1 hectometers
- 150 centimeters 1.5 meters
- 5 hectometers 0.5 kilometers
14Science 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
15Science 8 Solutions
- 1 meter 100 centimeters
- 5 meters 5000 millimeters
- 10 meters 0.1 hectometers
- 2 kilometers 2000 meters
- 6000 meters 6 kilometers
16Homework 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
17How 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
18Further 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)
19Answers
- 5.6 kg 5,600 g
- 2000 L 2,000,000,000 ml
- 60.2 dam 6,020 dm
- 7100 m 7.1 km
20Practice Problems
- Use the next 10-15 minutes to complete the Metric
Conversion worksheets
21Metric 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!