1. Science:
Section’s 2.1-2.2
Lyndsey Benes

2. 2.1
• Matter is the main source of the pure substances
and mixtures.
• This is a pretty simple graph of the graph of what
is in matter.
• Matter is broken up into two different sections;
Pure Substances and Elements.

3. Physical Properties
• There are many physical properties, a physical
property is any characteristic of a material that can
be measured without changing the composition of
the substances in the material.
• Viscosity is one of the physical properties; it is the
tendency of a liquid to keep from flowing. An
example is shampoo.
• Conductivity is; a material’s ability to allow heat to
flow. An example is a metal spoon.
• Malleability is; the ability of a solid to be hammered
without shattering. An example is pieces of zinc.

4. Pure Substance
• Matter that always has exactly the same
composition is classified as a pure substance.
• Table sugar and table salt are some examples of a
pure substance because no matter how much
sugar you take it always tastes equally sugary.
• Pure substances are broken up into two sections:
elements and compounds
• Elements are substances that cannot be broken
down into smaller and simpler substances.
• A compound is a substance that is made from two
or more simpler substances and can be broken
down into those simpler substances.

5. Mixtures
• Mixtures tend to retain some of the same
properties of their individual substances.
• Mixtures can also be broken down into two
different parts; Heterogeneous mixture and
Homogenous mixture.
• In a heterogenous mixture, the parts if the mixture
are very different from each other.
• In a homogenous mixture, the substances are so
much a like that it is hard to distinguish one
substance from another.

6. More Physical
Properties
• Hardness is; a comparative test between two
objects to see which one will scrape the other. An
example is zinc to aluminum.
• Density is; used to test the purity of a substance.
An example is identifying four metal objects lab.
• Melting point is; the temperature at which a
substance changes from a solid to a liquid.
• Boiling point is; the temperature at which a
substance boils.

7. 2.2
• There are many ways to use physical
properties; you can use them to identify
materials, choose materials, and to separate
mixtures.

8. Distillation
• Distillation is a process that separates
the substances in a solution based on
their boiling points.

9. Filtration
• Filtration is a process that separates
materials based on the size of the
particles and/or solubility

10. Evaporation
• Evaporation is a process used to isolate
a solid dissolved in a liquid

11. Reactivity
• The property that describes how readily a
substance combines chemically with other
substances.
• Oxygen is a highly reactive element.
• So is iron

12. Flammability
• Materials that can be used as fuel.
• Such as paper and nitrogen
• A materials ability to burn in the presence
of oxygen.

13. Electrolysis
we tested to see how water separated chemically

14. Review
• What are some examples of physical
change?

15. Review
• On what basis can mixtures be classified as
solutions, suspensions, or colloids

16. Review
• Why can the mixtures of a mixture vary?

17. Review
• What processes are used to separate
mixtures.

18. Review
• When does a physical change occur?