Today's science lesson will cover: 1. Physical vs chemical changes through notes and worksheets 2. Identifying volume through a lab 3. Test #2 on learning points from Oct 20-21 including notes and binder check 4. Basic particles that make up substances and how this determines if a change is physical or chemical 5. Signs that a chemical reaction may be occurring and examples of physical and chemical properties 6. The difference between endothermic and exothermic reactions

1. Today in Science Today you will need : Pencil, Colored Pencils, Highlighters Power Notes –Physical vs. Chemical Changes (Bookshelf - 2 pgs - 4 sides – Please Staple ) Volume Lab Worksheets Due Today Morning Tutorials On TUESDAY ! – I have a leadership meeting so no tutorials tomorrow

2. Test #2 and Binder Check #2 Update Log #2 – New work Target Concepts for Test #2 on Learning Point – Oct. 20 th & 21 st ½ page of notes, front side, done by hand Binder Check #2 – Table of Contents on- Learning Point for this week – Due Oct. 20 th at the beginning of class.

3. Identifying Volume There are THREE way to find volume in the chemistry classroom. You will need to know them in order to help you eventually determine the density of various objects . REMEMBER : Volume is the Amount of Space something takes up.

4. Basic particles that make up a substance. This determines whether or not a substance has gone through a physical or chemical change . We can identify substances according to their __________ & ___________ properties

5. H 2 O Ice water + Heat = H 2 O Liquid water Why do we have to use more than just physical propertie s to determine what a substance is? Different substances can look the same such as PYRITE – “Fools Gold”. It LOOKS like gold but required additional information and more property observations to identify. Physical Properties Characteristics of materials that can be observed w/out carrying out a chemical reaction Usually easy to reverse NO NEW substance created Examples of Physical Properties Color, size, texture, density, freezing pt. electrical & thermal conductivity, luster, malleability, ductility, hardness, mass, solubility

6. 2 H 2 O + = O 2 H 2 H 2 2 molecules of water electricity 1 molecules of diatomic oxygen 2 molecules of diatomic Hydrogen Different Substances Chemical Properties Characteristics that cannot be easily seen Must create a chemical reaction to observe NEW substance created Difficult to reverse Happens quickly ( explosion ) or slowly ( rusting ). Examples of Chemical Change Flammability, reacting with acid Oxidation (rusting-reacting w/oxygen), digesting, decomposition

7. Signs a Chemical Reaction may be occurring: Change in Color Bubbling or Fizzing Precipitant is created http://www.harpercollege.edu/tm-ps/chm/100/dgodambe/thedisk/chemrxn/signs.htm 4. Heat is absorbed or released (endothermic vs. exothermic) Energy is produced What is the difference between endothermic and exothermic? http://antoine.frostburg.edu/chem/senese/101/thermo/faq/exothermic-endothermic-examples.shtml Endo therm ic – Therm (heat) Endo (in) Ex: Cooking and egg, baking bread, photosynthesis Exo therm ic = Therm (heat) Exo (out) Ex: Rusting, Explosions, Fireworks

8. Physical or Chemical? Explain why the EVENT is either Physical or Chemical . Illustrate, color and explain your own two events. Remember: http://antoine.frostburg.edu/chem/senese/101/thermo/faq/exothermic-endothermic-examples.shtml The Law of Conservation of Mass – Matter cannot be CREATED or DESTROYED . It can only change form(physical) or become rearranged (chemical – a change in how the atoms - Review Questions Answers in notes Physical or Chemical P or C S or D = SAME substance DIFFERENT substance Extra Credit: Top 10 Amazing Observations – Online activity- each worth 2 pts.

9. Remember 1. Due by Wednesday