1. (8th) Chapter 2-1 Cornell Notes
“Describing Matter”

2. (8th) Chapter 2-1 Cornell Notes
matter-
substance-
physical property-
chemical property-
element-
atom-
chemical bond-
molecule-
compound-
chemical formula-
mixture-
heterogeneous mixture-
homogeneous mixture-
solution-
(8th) Chapter 2-1 Cornell Notes
Key Terms

3. (8th) Chapter 2-1 Cornell Notes
Key Questions
What kinds of properties are used to describe matter?
What are elements, and how do they relate to compounds?
What are the properties of a mixture?

4. (8th) Chapter 2-1 Cornell Notes
Paragraph 1
matter: has mass, takes up space;
chemistry: study properties of matter and its changes;
substance: single kind of pure matter.

5. (8th) Chapter 2-1 Cornell Notes
physical property: substance not changed (i.e. color, hardness, ability to dissolve in water);
chemical property: substance changes into other substances (i.e. burning, rusting).
Paragraph 2

6. (8th) Chapter 2-1 Cornell Notes
Paragraph 3
elements: make up matter;
elements: pure substances, cannot be broken down further;
atoms: basic particle makes up elements;
chemical bond connects atoms;
atoms combine to make up molecules (i.e CO2)

7. (8th) Chapter 2-1 Cornell Notes
Paragraph 4
elements combine to form compounds;
compound: pure substance of 2+ elements;
chemical formula can represent compound;
shows elements, ratio of atoms (i.e. CO2).

8. (8th) Chapter 2-1 Cornell Notes
Paragraph 5
most materials mixtures;
mixture: 2+ substances in same place but not chemically combined;
1. each substance in mixture stays pure;
2. parts of mixture not combined in set ratio.

9. (8th) Chapter 2-1 Cornell Notes
Paragraph 6
(8th) Chapter 2-1 Cornell Notes
mixture heterogeneous or homogeneous;
heterogeneous mixture: you see different parts;
homogeneous mixture: so evenly mixed can’t see parts (example: solution like air);
unlike compounds mixtures easily separated into parts.