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