Pure substances can be either elements or compounds. Elements cannot be broken down further, while compounds are made of two or more simpler substances. Mixtures contain elements and/or compounds but their properties are not as consistent as pure substances. Evaporation, filtration, and distillation are processes used to separate mixtures based on differences in their physical properties like particle size, solubility, and boiling point. Chemical properties involve changes in a substance's composition, while physical changes do not alter the composition.

1. SCIENCE
Spencer DellaSalle

2. Pure Substances
• Matter with the exact same composition.
• two categories:
• Elements
• Compounds

3. Elements
• Cannot be broken down into simpler
substances
• Only about 100 elements exist
• contains only one type of atom
• ie. Gold (Au), Aluminum (Al), Carbon
(C)

4. Compounds
• Compound is made from two or more
simpler substances
• Simpler substance is either element or
compound
• ie. Oxogen, Silicon

5. Mixtures
• Mixtures retain some of their properties of
their individual substances
• Properties of a mixture are less than
constant than the properties of a substance
• ie. salsa

6. Heterogeneous
Mixtures
• part of this mixture are noticeably different
from one another
• ie. Salsa

7. Evaporation
• A process used to isolate a solid dissolved
in a liquid.
• EX. NaCI + water (sodium chloride)--
>table salt

8. Filtration
• A process that separates materials based
on the size of the particles +/or Solubility.
• EX: Sodium chloride and Sulfer

9. Distillation
• A process that separates the substances in
a solution based on their boiling points.
• EX: Evaporation of mystery substance lab.

10. Chemical Properties
• Can be observed only when the substance
in a sample of matter are changing into
different substances.

11. Chemical Properties
• There are three common types of evidence
of a chemical change, color change,
production of gas, and the start of
precipitation.

12. Chemical or Physical
• When matter undergoes a chemical
change, the composition of the matter
changes. When matter undergoes a physical
change, the composition of the matter
reamains the same.