HW: Read 2.1 – pg Q’s 4-7 Today: Data Display Activity Due: 2.1 (Part 1) Tues. 9/8/15

2. Draw out the graph. Must have: Labeled axes (units) Key (if needed) Research Question Detailed Title 1. How would you organize this Data? Smart Starter: 9/8/15 Avg. Blood Pressure by Age and Gender

Science Olympiad Mtg. advisory Tu & Th (9/8&10) Ask me for a pass! Announcements: Good Things? 9/8/15

HW: 2.1 Reading/Qs part 2 Pg Q’s th Period - None Today: Finish Graphing (Ch. 1) Matter (Ch. 2) – guided notes Due: 2.1 Reading and Questions – Part 1 Wedn. 9/9/15

HW: None Today: Finish Graphing Matter (Ch. 2) – guided notes Due: 2.1 Reading/Qs part 2 Pg Q’s 4-7 TH 9/10/15

Geologists often take core samples to tell what type of rock is in the strata or layers under ground. What are some easily observed characteristics of rock (think matter) that they can use to identify the rock? Smart Starter: Wednesday 9/9/15

New piece of paper This will go in your “Test” section

CLASSIFYING ITEMS Why do it? Apple Pear Orange Lime plum Rose Violet Daisy Gold Silver 2. Explain what criteria you used to place items into each category of your classification system. Devise a classification system for the following items:

MATTER A Brief History of Nearly Everything - Bryson

Substance Pure Uniform Ex. Table Salt, Sugar Substances can be classified into two categories—elements and compounds.

Element Simplest unit of a substance Can’t be broken down by chemical means An element has a fixed composition because it contains only one type of atom. No two elements contain the same type of atom.

Aluminum, carbon, and gold are elements that you can see in common objects, such as cans, pencils, and rings. Mixtures containing iodine are used to prevent and treat infections. Elements AluminumCarbonGoldIodine

Atom

Compound 2+ elements/substances present Can be broken back down Fixed proportion *The properties of a compound differ from those of the substances from which it is made.

Comic Break

Did you get it? The major difference between an element and a compound is: A. a compound cannot be broken down into simpler substances, but an element can be. B. an element cannot be broken down into simpler substances, but a compound can be C. an element can be separated by chemical means, but a compound can’t be. D. a compound can be separated by chemical means, but an element can’t be. SELECT ALL CORRECT ANSWERS

Mixture How do mixtures differ from pure substances?

Ex. Cookie dough

Properties of a Mixture – Same as individual substances?

Homo & Hetero HOMOGENEOUS Mixtures Homo = Same – evenly distributed think -hot sauce ex. Steel HETEROGENEOUS Mixtures Hetero = different – parts noticeably different think - chunky salsa ex. Sand I SPY WITH MY LITTLE EYE

Did you get it?

Solutions, Suspensions, and Colloids Properties of the mixture are affected. 3 types of Mixtures Based on the size of its largest particles….

These liquids represent three categories of mixtures. Muddy water collected from a swamp Windshield wiper fluid Milk

Solutions When substances dissolve and form a homogeneous mixture, the mixture that forms is called a solution. Solvent Solute

Suspensions A suspension is a heterogeneous mixture that separates into layers over time.

Colloids – the inbetween A colloid contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension. Like solutions, colloids do not separate into layers. You cannot use a filter to separate the parts of a colloid.

These liquids represent three categories of mixtures. Muddy water collected from a swamp Windshield wiper fluid Milk Which is it?.

SmartStarter How can knowing the physical properties of matter be useful?

2.2 Physical Properties Physical Properties – observed/measured w/o changing composition – Viscosity-Hardness – Conductivity-Malleability – melting point-boiling point – density Separation Methods Filtration Distillation Physical Change

Viscosity Resistance to flow Thick, sticky, slow moving = very viscous Thin, easily flowing = low viscosity Temperature’s effect on LAVA’s viscosity…

ViscosityViscosity …Cool Example Non-newtonian fluid: Oobleck – cornstarch

Conductivity

Malleability

Hardness

melting point / boiling point

density Can be used to determine if a substance is pure or not…???

Smart Starter: FRI 9/18/15

Science CREATES humor Announcements: Good Things? FRI 9/11/15 Grades are posted Sign Social Contract

2.2 Physical Properties Physical Properties – observed/measured w/o changing composition – Viscosity-Hardness – Conductivity-Malleability – melting point-boiling point – density Separation Methods Filtration Distillation Physical Change

Separation Methods – using physical properties… Filtration Uses particle size… Distillation… Uses boiling points

Distillation - the action of purifying a liquid by a process of heating and cooling

Physical Change Physical properties change BUT… Substances in the materials (chemical) do not change Ex. State changes = density changes shape/form changes

2.3 Chemical Properties Properties observed when changing = ability to produce a change in composition Chemical Change – composition of the matter changes… forms different molecules/compounds Examples: flammability, reactivity, release of energy (heat, light, noise)

Flammability Does it combust? Burn? – copper/hose Observation!Burn – (when oxygen is present)

Reactivity How easily/readily does it combine chemically with other substances Other words: tendency of substances to undergo chemical change

SmartStarter

Assessment Questions 1.Which of these substances is a compound? a.copper b.water c.oxygen d.carbon

Assessment Questions 1.Which of these substances is a compound? a.copper b.water c.oxygen d.carbon ANS:B

Assessment Questions 2.Which of these groups of letters could be used as a symbol for an element? a.HF b.Cm c.Car d.fe

Assessment Questions 2.Which of these groups of letters could be used as a symbol for an element? a.HF b.Cm c.Car d.fe ANS:B

Assessment Questions 3.Which of the following statements does not apply to a compound? a.It is made of two or more elements. b.It has components that are joined in fixed proportions. c.It can be separated into components by physical methods. d.It can be broken down into elements or other compounds.

Assessment Questions 3.Which of the following statements does not apply to a compound? a.It is made of two or more elements. b.It has components that are joined in fixed proportions. c.It can be separated into components by physical methods. d.It can be broken down into elements or other compounds. ANS:C

Assessment Questions 4.How does a compound differ from a mixture? a.A compound cannot be broken down into simpler substances. b.Compounds can be separated by physical processes and mixtures cannot. c.The composition of a mixture cannot vary. d.A compound is made of two or more elements in fixed proportion.

Assessment Questions 4.How does a compound differ from a mixture? a.A compound cannot be broken down into simpler substances. b.Compounds can be separated by physical processes and mixtures cannot. c.The composition of a mixture cannot vary. d.A compound is made of two or more elements in fixed proportion. ANS:D

Assessment Questions 5.Which of these materials is a heterogeneous mixture? a.air b.seawater c.sand d.steel

Assessment Questions 5.Which of these materials is a heterogeneous mixture? a.air b.seawater c.sand d.steel ANS:C

Assessment Questions 6.Which of the following can be separated with a filter? a.colloids b.compounds c.solutions d.suspensions

Assessment Questions 6.Which of the following can be separated with a filter? a.colloids b.compounds c.solutions d.suspensions ANS:D

HW: Observe something related to physical science that you can hypothesis about. -Observations! Today: Social Contract Continue with 2.1 – Characterizing Matter Due: None FRI 9/12/15

HW: Read 2.2 – Fill in the notes guide Today: Matter Due: 2.1 Reading/Qs part 2 Pg Q’s 4-7 9/10&11/15