WHAT’S NEW? MP2

• Notebooks – if you earned a 90 or above, you do not have to turn a notebook in again

• Periodic Table of Elements – Need to memorize and recite the First 20 for a quiz grade

• Keep a classwork/worksheet log in your notebooks

Matter has PROPERTIES

PROPERTY – A characteristic of a substance that helps identify what the substance is. There are two kinds of properties:

a. Physical Properties – b. Chemical Properties

What properties doesThis liquid have?

Matter Has Physical Properties• Physical properties can be observed without changing the substance.

A physical property is • Brittleness (how easily does it break?)• boiling point• Color• Density (m/v)• Malleability (ability to be pounded into different shapes)• Solubility (the ability to dissolve into another substance)• Conductivity (does it conduct heat or electricity?)• Flexibility• Hardness • mass• melting point, freezing point, condensation point, • Volume• electric properties• magnetic properties• Solid, liquid or gase

Physical PropertiesA physical property is

• Brittleness (how easily does it break?)• boiling point• Color• Density (m/v)• Malleability (ability to be pounded into different shapes)• Solubility (the ability to dissolve into another substance)• Conductivity (does it conduct heat or electricity?)• Flexibility• Hardness • mass• melting point, freezing point, condensation point, • Volume• electric properties• magnetic properties• State of matter (whether it’s a solid, liquid or gas)

Physical Properties

• Quantitative – Properties that can be measured. (mass, volume, length, etc.)

• Qualitative – Properties that are perceived by the five senses (taste, touch, smell, sight, sound)

Are the following properties Qualitative or Quantitive?

• The gold bar is 3 dm long and has a mass of 200 kg

• The gold bar is shiny• The gold bar is heavy• The gold bar has a volume of 1,000 ml

Matter has Chemical Properties

• A characteristic of a substance that can be seen during a chemical reaction.

• Flammability (does it catch fire?)• Reactivity with water or other substances (volatility)• Chemical stability in a given

environment (is it explosive?) (Combustibility)• Acid or Base?

Warm-up

1. Please take out your homework – we will be collecting it.

2. Please use your notes on quantitative and qualitative observations to complete the warm-up

What do you think this filled with?

What is the difference between a Hydrogen and Helium atoms?

Physical Changes• Physical changes can change some physical properties

but do not change the substance.

Melting is a physical change

Change of State is a Physical Change

• Can a change from solid to liquid to gas be reversed?

• Yes!

Dissolving sugar in water is ???

• Physical change – why?– The sugar has not changed, it’s properties remain

the same– Can be separated by evaporation or distillation

Mixing Oil and Water is ????Physical Change – why?-- the oil and vinegar can be separated and their properties have not changed

Chemical Changes

• Occurs when one or more substances are changed into entirely new substances with different properties

• Evidence of a chemical change:• Color change• Fizzing or foaming• Heat• Production of sound, light, odor

Warm-up

• When ice melts, does the temperature go up, go down or stay the same?

• If a jar has a mass of 120g and a volume of 25 ml, what is the density?

• Describe two chemical properties of matter• Describe to physical properties of matter• In a recycling plant, how do you think they use

physical properties to separate plastics from newspapers?

Matter – Chemical Changes

• Elephant Toothpaste.• What evidence do you have that a chemical reaction

took place?

Can chemical changes be undone?

• Most Chemical changes cannot be reversed because new substances have been formed

Acid Rain is an example of a chemical change.When coal is burned it produces sulfur, combined with water in the atmosphere sulfuric acid is produced.

Matter – Property Changes

• If the size, shape, or form of matter changes it is a physical change.

• Physical weathering is a type of physical change.• Rusting is a chemical change because the substance –

iron (Fe) is changed into a new substance – Rust (Fe203)

Let’s go over

• Way to change worksheet• Study Guide

Matter Can Change

• Physical Change– Physical properties (size, shape, etc) of a substance

change. The elements or compounds are not altered.• Chemical Change

• Atomic bonds are broken • New atomic bonds

are formed• The substance does NOT

have the properties it once did.

Test – next Thursday

• Pages in the book:Section B, Chapter 4, pp. 111-123 and pp. 134-138Section A, Chapter 2, pp. 41-64.• ConceptsPhysical properties, chemical properties, elements, mixtures, solutions

Elements, Mixtures, Compounds

• You should be able to tell the difference!

Elements are pure substances

• All atoms on the periodic table are elements• Substances that are made of only one kind of

atom are ELEMENTS• Examples include

Compounds

• Are the result of a chemical change. In a compound, bonds are broken and a completely new substance is made.

• Compounds are represented by chemical formulas. (H2O, C6H12O6)