Homework Due Tomorrow: 1. Quiz Corrections 2. Density HW 3. Classroom Materials 4. Progress Reports

Oct. 9, 2012 AGENDA: 1 – Bell Ringer 2 – Cornell Notes: Chemical & Physical Properties; Density 3 – Density Problems 4 – 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 questions A – 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 Spencer Period 2 – Shadara Muhammad & Jordan Bennett Period 3 – Asia Lewis, Gregory Chiles, Shemia Milhouse

Oct. 9, 2012 AGENDA: 1 – Bell Ringer 2 – Cornell Notes: Chemical & Physical Properties; Density 3 – Density Problems 4 – 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 questions A – Activity – Cornell Notes: Chemical & Physical Properties; Density M – Materials and Movement – Pen/Pencil, Notebook or Paper P – Participation – Complete your notes S – 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 change 3)Temperature change

Density  Density is a physical property of matter that is unique for each substance.  For example: The density of gold is g/mL. The density of pure water is 1.00 g/mL.  Density is defined as the amount 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: V object = V water with object – V water 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 answers Calculate 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 Corrections 2. Density HW 3. Classroom Materials 4. Progress Reports