Conservation of Matter / Mass(2025-2026)

Vocabulary:  Conservation, Matter( gr 7 vocab ), Mass( gr7 vocab )

In chemical changes, we are playing around with bonds - breaking original ones and making new ones.

So what happens to the total number of atoms in a chemical change?  Do they increase? Decrease?  Stay the same?

The answer is they stay the same.  

Check out this video:

Here is the powerpoint from class showing different kinds of chemical reactions:

Chemical & physical changes(2025-2026)

Vocabulary:  Oxidation, combustion, neutralization

Now that we know what Matter looks like from an atomic or molecular point of view, we will now use this knowledge to look at changes in Matter.

Watch the video below and look for the 5 or six signs( according to our workbook )of a chemical change in each demo.

The Periodic Table of the elements(2025-2026)

Vocabulary:  Periodic

The Periodic table of the elements is an infographic of all the known elements.