1. Warm Up 1.Which graph would best show the relationship between height and arm length? 2.Calcium ions play an important role in the function of neurons in the brain. Elements that are chemically similar to calcium can interfere with the function of neurons. Which of the following is most likely to imitate calcium’s role in the function of neurons?

2. Announcements Unit 7 test this Friday (3/19) Stay on top of your grades this quarter- make sure you’ve taken unit 6 test (it’s really short!) Welcome to fourth quarter!!!

3. Mystery Element #1: It is a gas. #2: Fills Valentine and birthday balloons. #3: Has atomic number 2

4. Take 1

5. Gases Particles are: –Spread apart –In constant motion –Very small –Exert force on each other when collide –Exert force on container when collide –Which is the gas?

6. Volume Volume measures how much space matter takes up. The units of Volume are Liters (L) –1 L = 1000 mL

7. Boyle’s Law Boyle’s Law relates gas pressure and gas volume Equation: Initial PressureInitial VolumeFinal Pressure Final Volume *You can use any units, as long as they are on the same on each side

8. Temperature Temperature is a measure of how fast the molecules in a substance are moving. –The faster they move, the higher the temperature Temperature is measured in: –Degrees Fahrenheit (°F) –Degrees Celsius (°C) –Kelvin (K)

9. Converting Temperature Kelvin and Celsius Ethanol freezes at -166 °F. Convert the temperature to Celsius What temperature, in Kelvin, does ethanol freeze at?

10. Temperature and Volume Temperature measures how fast the gas molecules are moving Volume measures the space the gas molecules take up If the temperature increases, will the number of collisions between the molecules and the container increase or decrease? Explain. If the temperature increases, what will happen to the volume? Explain. Recall Answer the following in complete sentences on the notes sheet

11. Charles’ Law Charles’ Law relates the temperature of a gas to the volume of a gas. The units for T must be Kelvin (K). –What could happen if the temperature was in C or F? The units for volume can change. Initial Volume Initial Temperature Final Temperature Final Volume

12. To solve problems: we have to… Read the problem Identify what you know and don’t know. Write the formula/equation. Plug in numbers you know. Solve for what you don’t know know (using a calculator). Remember units!

13. Charles’s Law Practice sheet Complete each problem If you need a calculator, get one from the bin You make work quietly in groups Write on a SEPARATE SHEET OF PAPER

14. The Metric System! Liter (L) - volume Meter (m) - length Gram (g) - mass Degrees Celsius (C°)- temperature

15. Prefix Goes in front of any BASE unit Most common: Kilo, centi, milli Example: Kilokilometer Centi+meter = centimeter Millimillimeter

16. What are base units again??? The units without any prefixes! Meter Liter Gram Degrees celsius

17. King Barry’s Conversions To convert units = to go from one unit to another King Barry Can’t Marry Kilo base Centi Milli BIG to small To convert units we jump decimal places And just remember 3, 2, 1

18. 5.1 km = ? M Kilometer - meter - centimeter – millimeter 3, 2, 1 To go from kilometer to meter Move decimal RIGHT Move decimal 3 places

19. 60. g = ? kg Kilogram - gram - centigram – milligram 3, 2, 1 To go from gram to kilogram Move decimal LEFT Move decimal 3 places

20. 700. L = ? cL Kiloliter - liter - centiliter – milliliter 3, 2, 1 To go from liter to centiliter Which direction do we move? Move decimal 2 places

21. 40 cm = ? mm Kilometer - meter - centimeter – millimeter 3, 2, 1 To go from centimeter to millimeter Which direction do we move? Move decimal 1 place

22. 40 mg = ? cg Kilogram - gram- centigram – milligram 3, 2, 1 To go from milligram to centigram Which direction do we move? How many places do we move?

23. .05 m = ? mm Kilometer - meter- centimeter – millimeter 3, 2, 1 To go from meter to millimeter Which direction do we move? Move decimal 2 places and then 1 more place

24. 40 mL = ? L Kiloliter - liter - centiliter – milliliter 3, 2, 1 To go from milliliter to liter Which direction do we move? How many places?

25. Metric Conversion practice!

26. QUIZ-metric conversions Work silently and alone for full credit

27. Done Early? Start on homework Work quietly, be respectful

28. Sum up What did we learn today? HW: Top Ten: –How’d we do?