Warm-up 9/14/09

1
Warm-up 9/14/09

• BE ready for test.
• Yellow packet
• Test Today

2
Warm-up 9/14/10

• What is Matter?
• List 10 things that are matter.
• What is mass?
• What is volume?

3
Essential Questions What is intensive and
extensive properties? Look in book

• Warm-up 9/16/10
• What is the formula for density?
• Do you know the formula triangle?
• What are mass and volume?

D m/v
4
Pre-lab

• What is the formula for calculating volume of
  cylinder?
• How do we calculate the volume of irregularly
  shaped object?

V ?r2h
Water displacement Eureka!!!
5
Density Problems

• If 25.6 grams of a substance has a volume of 5.7
  mL, what is the substance? How do I know how to
  round it off?
• What mass of aluminum occupies 18.98cm3 ?

25.6 g 4.49122807 4.5 to sig figs 5.7mL
Use yellow packet find density of aluminum
D m/v 2.702g/ml m/18.98cm3 m 51.28 grams
6
Density Lab 9/17/09What is each cylinder made of?

• 4 different types of cylinder
• use formula for cylinder to calculate volume of
  silver and gold
• use water displacement to calculate volume of
  black and white plastic
• measure mass of all on balance

7
Penny Lab

• 1) Select 10 Pre-82 pennies and 10 83 and newer
• 2) Determine the density of each set of pennies.
• You can use either method to determine volume.
• 3) Find the metal on page R-47 through R-49
• Make sure it sounds like a reasonable metal
• 4) What other physical or chemical properties
  could we use to make the final distinction

8
Essential Question What are chemical vs physical
properties?

• Warm-up 9/15/09
• What are physical and chemical changes?
• To do
• Quiz Thursday (some warm-ups)

9
Unit Essential Question What is density? Daily
EQ Can we graph density?

• Warm-up 9/16/09
• 1) What is the density of 78 grams of aluminum
  that has a volume of 28.87mL?
• 2) How many grams of gold were found in the ship
  wreck if it occupied 435cm3 of space (density of
  gold is 19.31 g/cm3) ?
• Quiz tomorrow

10
Unit Essential Question What is density? Daily
EQ Can we graph density?

• Warm-up 9/17/09
• The slope of the mass vs. volume graph is equal
  to what?
• When graphing mass vs. volume who is on what
  axis?
• Quiz Today Yeah!!

11
Unit Essential Topic Physical vs Chemical
changes, The battle wages on !

• Warm-up 9/18/09
• Daily EQ What three things indicate that you
  have had a chemical change/reaction?
• What is Find and Fix?
• Quiz returned figure out which ones you got
  wrong and find correct errors