1. Catalyst - WAY BACK WEDNESDAY! Grab a calculator on your way in! Please have your completed homework on your desk. 3 1. Mr. Knipmeyer wants to see if wearing a tie will make Cox students score better on their tests. What is the IV, DV, and 3 things he should keep constant? 2. How many nanodollars are there in a dollar? 3. How many feet are there in a mile?

2. Today’s Agenda  Catalyst  Homework Review  SPECIAL MESSAGE  Practice, Practice, Practice!  Exit Question HOMEWORK TONIGHT – DIM AN. UNIT TEST ON FRIDAY!

3. Today’s Objectives  SWBAT master dimensional analysis.

4. Exit Question and HW Review  In July 2008, it was estimated that the world’s population is about 6,707,000,000. The United States’ population was estimated to be 304,060,000. The coldest temperature ever created by man is 0.000000005°K. Write these 3 numbers in scientific notation.

5. Convert it like it’s really hot Let’s get this stuff even better with MORE practice and a better Understanding of units

6. SPECIAL GUEST WHO COULDN’T MAKE IT TODAY  SNOOP HAS A MESSAGE FOR YOU! SNOOP HAS A MESSAGE FOR YOU!

7. Working on the Railroad  Step 1:  What to what?  Step 2:  Write conversion factor(s)  Step 3:  Train tracks

8. HW – How do we do that?  We have to understand prefixes even better! BIGGEST BIGGER BIG tiny tinier tiniest G M k h d c d m n m i e i e e e e i a i g g l c k n c l n c a a o t a t i l o r o I I o

9. Length - Meters  Creepy Math Guy found a ruler! SWEEET!SWEEET!

10. Volume - Liters << 1 mL1 kL1 L

11. Mass - Grams << 1 mg1 kg1 g.

12. Length - Meters << 1 mm 1 km 1 m.

13. Always remember…  Key Point #1: In two step problems, always convert to the unit without a prefix first.  Mass: grams  Distance: meters  Volume: liters

14. Practice…  Chris Paul has a mass of 79.4 kg, convert this to mg.  *Bonus: If a standard basketball has a mass of 620, 000 mg, how many basketballs would equal the mass of Chris Paul?

15. Practice  There are 1135 decaliters (daL) in a pool. Convert to centiliters (cL).  10 L = 1 daL  100 cL = 1 L

16. Practice!  The average human eye blink is 300 milliseconds. Convert this to hectoseconds.

17. Practice How many deciliters are in a liter?

18. Practice How many grams are in a kilogram?

19. Practice How many micrometers are in a meter?

20. Practice How many milligrams are in a gram?

21. Practice How many meters are in a dekameter?

22. Practice How many liters are in a gigaliter?

23. Practice How many centigrams are in a gram?

24. Practice How many meters are in a megameter?