INB pg. 25 CN topic: Chemical Changes Essential Question: What happens when a Chemical change (reaction) takes place?

Lets create our 3 Questions Q3: What causes Chemical Changes? Talk to your neighbor and come up with Q’s #1-2 you have about the chemical changes (reactions) of objects

A change in a substance that results in a new substance being formed. Notes Section: Chemical Change A change in a substance that results in a new substance being formed.

Chemical Change Examples: Burning a match Cooking food Rust forming Digesting food

Physical Change or Chemical Change ? You decide.. Baking a cake Chemical change The melting wax on a candle Physical change Putting salt on the icy sidewalk Physical change Burning the wick of a birthday candle Chemical change

Physical Change or Chemical Change ? You decide.. Sawing a piece of wood Physical change Cutting your hair Physical change Bleaching your hair Chemical change Coloring in a coloring book Physical change

Chemical changes create new substances. New substances are the result of a chemical reaction.

Remember, everything is made of chemicals. This is the chemical equation of the demonstration by Mr. Dukaj.   Baking soda  + vinegar     →   Carbon Dioxide  +  Water  +  Sodium acetate  NaHCO3  +  HC2H3O2     →     CO2  +  H2O  +  NaC2H3O2 

Summary With your neighbor, create your own example of a chemical change by copying and filling in the blanks. SUMMARY: Chemical changes happen when the object does becomes something new. One example is ___________________________. This is a chemical change because _________________________________. Every time I digest my food, I turn it into energy with a chemical reaction!