10/12  Mythbusters, Science in popculture!

No WHOT this week.10/13  Objective/SWBAT: Students will demonstrate combustion using molecular models and represent the reaction using proper chemical conventions.  Warm up – In your Journal  Explain “Conservation of matter in your own words.  (This should go after your T-Chart)  Responsibilities: Lab Part 1 complete (T-chart) Lab Parts II and III due Friday!

Conservation of mass in a chemical reaction.  Explain how we just showed conservation of mass in a chemical reaction.  Read the paragraph after #12 and answer A-D  What I observedEvidence for or againstHow I know. chemical reaction You should have at least 3 observations.

No WHOT this week.10/15  Objective/SWBAT: Students will demonstrate combustion using molecular models and represent the reaction using proper chemical conventions.  Warm up – In your Journal  3H 2 O  How many total atoms are there?  Responsibilities: Homework: Due Tomorrow!  Reacting to Density Lab finished. Double T Chart from part 1, #3, 4, 5, and 6 from todays lab. Stop and Think Qs 1-3.

Parts of a candle?  Wick and “fuel”  Why doesn’t the wick burn faster?

Reminder…  What is combustion???  Ohh it’s a chemical reaction!  Chemical reactions start with…  And end with…  Lets Write the chemical reaction for the combustion of methane…

Warm-up (10/15)  Sketch the lava lamp. Explain why some lumps are going up, and some are going down. (Hint: use the word density)  Explain this at a particle level (what are the particles in the blobs moving up look like? What do the particles in the blobs moving down look like?).  Have your T-Chart ready for homework check.

Demo of colored liquids.

Thermal Expansion 

 WHOT QUESTION:  WHOT QUESTION: Combustion is a type of chemical reaction. What evidence tells you a chemical reaction happened?

 Why did we lose mass when we opened the bottle?

Phase Change Diagram: How can we “account” for the ENERGY?

Particle diagrams plus written explanations Particle diagram that describes liquid Particle diagram that describes gas Particle diagram that describes the solid tablet Particle diagram that describes the reacting tablet Particle diagram that describes the matter inside the balloon All the same as the capped bottle plus…

What? How does it work?

Essential Notes of the day:  Chemical properties describe how a material reacts (or fails to react)in the presence of another.  Boiling, melting, freezing, condensation, and evaporation are physical changes related to the physical properties of the substance.  Solid, liquid, and gas are some states of matter. These are also referred to as phases of matter. These states depend on temperature and pressure.  Solids have a defined shape and are NOT compressible.  Liquids take on the shape of the container, are fluid, and are NOT compressible.  Gases can take on an infinite volume, yet are compressible.  In a chemical reaction existing matter is rearranged, what comes out has different properties than what went in.  Key Concept- Matter is not destroyed, simply rearranged- the Law of Conservation of Matter.