Homework Due Tomorrow:
1. Quiz Corrections2. Density HW3. Classroom Materials4. Progress Reports
Oct. 9, 2012
AGENDA:1 – Bell Ringer2 – Cornell Notes:
Chemical & Physical Properties; Density
3 – Density Problems4 – Density Lab
Preview
Today’s Goal:Students will be able to calculate density of substances.Homework
1. Quiz Corrections
2. Density HW
3. Classroom Materials
4. Progress Reports
CHAMPS for Bell Ringer
C – Conversation – No Talking H – Help – RAISE HAND for questionsA – Activity – Solve Bell Ringer on
binder paper. Homework out on desk
M – Materials and Movement – Pen/Pencil, Notebook or Paper
P – Participation – Be in assigned seats, work silently
S – Success – Get a stamp! I will collect!
Monday, Oct. 9th
Objective: Students will be able to calculate density of substances.
Bell Ringer:Name 2 objects that float and
2 objects that sink in water
4 MINUTES REMAINING…
Monday, Oct. 9th
Objective: Students will be able to calculate density of substances.
Bell Ringer:Name 2 objects that float and
2 objects that sink in water
3 MINUTES REMAINING…
Monday, Oct. 9th
Objective: Students will be able to calculate density of substances.
Bell Ringer:Name 2 objects that float and
2 objects that sink in water
2 MINUTES REMAINING…
Monday, Oct. 9th
Objective: Students will be able to calculate density of substances.
Bell Ringer:Name 2 objects that float and
2 objects that sink in water
1minute Remaining…
Monday, Oct. 9th
Objective: Students will be able to calculate density of substances.
Bell Ringer:Name 2 objects that float and
2 objects that sink in water
30 Seconds Remaining…
Monday, Oct. 9th
Objective: Students will be able to calculate density of substances.
Bell Ringer:Name 2 objects that float and
2 objects that sink in water
BELL-RINGER TIME IS
UP!
Monday, Oct. 9th
Objective: Students will be able to calculate density of substances.
Bell Ringer:Name 2 objects that float and
2 objects that sink in water
Shout Outs
Period 1 – Cierra Harbin & Khalian SpencerPeriod 2 – Shadara Muhammad & Jordan BennettPeriod 3 – Asia Lewis, Gregory Chiles, Shemia Milhouse
Oct. 9, 2012
AGENDA:1 – Bell Ringer2 – Cornell Notes:
Chemical & Physical Properties; Density
3 – Density Problems4 – Density Lab
Preview
Today’s Goal:Students will be able to calculate density of substances.Homework
1. Quiz Corrections
2. Density HW
3. Classroom Materials
4. Progress Reports
Week 4
Weekly Agenda
CHAMPS for Density Notes
C – Conversation – No Talking – Take notes
H – Help – RAISE HAND for questionsA – Activity – Cornell Notes: Chemical
& Physical Properties; DensityM – Materials and Movement –
Pen/Pencil, Notebook or PaperP – Participation – Complete your
notesS – Success – Write three questions
and summary about notes. Answer HW questions.
Cornell Notes: Please take out your notebook and properly set up your
paper.Topic: Chemical &
Physical Properties; Density
Date: 10/4/2012
Physical and Chemical Properties
Physical properties: Characteristics that
can be measured or observed without changing the object’s composition
Chemical Properties: Ability of a
substance to change into one or more new substances (chemical reaction)Examples:
Density, Color, Melting, Boiling, (Phase Changes), Cutting, Folding,
Crushing
Examples:Chemical Reaction:1) Gas evolves (comes
off)
2) Color change3) Temperature
change
Density
Density is a physical property of matter that is unique for each substance. For example:
The density of gold is 19.32 g/mL. The density of pure water is 1.00 g/mL.
Density is defined as theamount of mass per unit volume
Density = _mass (g)_ or D = m volume (mL) V
Units = g/mL
Measuring Density (D = m/v) To find an object’s…
Mass (grams) Use a balance or scale Volume (mL)
Geometry Water displacement:
Vobject = Vwater with object – Vwater without
object
Practice: Which is more dense?
Grape Foam Block
Density Example
Find the density of an object with a mass of 100g and a volume of 10mL.D=100g/10mL=10g/mL
Practice:Calculate the Density of…
1. …an object with a mass of 50g and a volume of 5mL.
2. …an object with a mass of 8g and a volume of 16mL.
3. …an object with a volume of 3mL and a mass of 12g.
4. Which of these objects will float in water? (water’s density = 1.00 g/mL)
Practice: Check your answersCalculate the Density of…
1. …an object with a mass of 50g and a volume of 5mL. D=50g/5mL=10g/mL
2. …an object with a mass of 8g and a volume of 16mL. D=8g/16mL=0.5g/mL
3. …an object with a volume of 3mL and a mass of 12g. D=12g/3mL=4g/mL
4. Which of these objects will float in water? (water’s density = 1.00 g/mL) Object #2 will float, 0.5g/mL < 1g/mL
Homework Due Tomorrow:
1. Quiz Corrections2. Density HW3. Classroom Materials4. Progress Reports
