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Science 8 Bellwork : Tuesday 9/1/09

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:

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Science 8 Bellwork : Tuesday 9/1/09

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  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??? • There has to be a better way… Converting Standard Measurements

  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 example…The 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 don’t 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 don’t 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 centimeterto 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 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 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! • Kilo- • Hecto- • Deca- • BASIC UNIT • Deci- • Centi- • Milli- • Kittens • Hate • Dogs • BECAUSE • Dogs • Can’t • Meow • 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!

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