Lesson 5 - How can we tell that a change is chemical and not physical?

Lesson goal:  

You should be able to list the clues that scientists use to know if a chemical change takes place or if the change is just a physical change.

Materials needed: 

Signs of Physical and Chemical Change notes sheet, pencil

Lesson Steps:

1. Listen to this Jing - Evidence/Clues to Chemical Reaction & Homework Night 3
2. Explore headings on pages 81-84 in textbook, hard copies of this book are available in class.
3. Watch videos in this slideshow, use the box on each slide and pick the clues that match the reaction.  Answers to each reaction is found later in the slideshow.
4. Using book, fill out Signs of Physical and Chemical Change notes organizer
5. Share ideas with class

Measuring your learning:  

You will know you are understanding if you can think of at least two ways that show that a chemical change took place.  You will also show you understand this by investigating this for your chemical reaction.  Evidence of a chemical reaction will go on your final project.  

No homework, unless you still haven’t found your chemical formula for your project