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 does This 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 Adaptive Curriculum – Separation of Mixtures Combine some iron filings with cereal and have students separate this mixture. Adaptive curriculum – heating properties of different pans.

Physical Properties Brittleness (how easily does it break?) 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 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. 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) Play song – Don’t Change by GooGoo Dolls. PSA – Two Ways to Change Wrksht.

Let’s go over Way to change worksheet Study Guide

Matter Can Change Physical Change Chemical 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. We can physically change the copper by mixing it with tin. Chemically changing the copper would require a reaction with something like water or acid rain to make it tarnish.

Test – next Thursday Pages in the book: Section B, Chapter 4, pp. 111-123 and pp. 134-138 Section A, Chapter 2, pp. 41-64. Concepts Physical properties, chemical properties, elements, mixtures, solutions

Elements, Mixtures, Compounds You should be able to tell the difference! Brainpop – mixtures compounds

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)