1. UNIT 2 – MATTER AND CHEMICAL CHANGE
TOPIC 1 – EXPLORING MATTER
Can I describe and apply different ways of classifying materials based on their composition and their properties (pure substances and mixtures)?

2. Chemistry is the: __________________
The properties (________________) between matter
_____________________________________________(reactions)

3. What exists on Earth but is not matter?
But what is matter?
Matter is anything that:
______________
What exists on Earth but is not matter?
__________

4. All chemicals need to be treated with care.
Many chemical are CAUSTIC and will, ______________________________________.
Ex. Acids, strong bases, and other chemicals easily break down skin and muscle and can cause permanent damage.

5. Classifying Matter
Matter is most often described using the Particle Model of Matter
_________________________________________________________.
How tiny? In one drop of water there are
water particles in it!
(that’s 17 with 20 zero’s behind it)
2.______________________________________ ___________________________. The particles of one type are all identical to each other and are different from other particles of other pure substance.
Eg. All salt particles taste salty. All sugar particles taste sweet. All water particles at sea level have the same melting (0 0c) and boiling point (100 0c).

6. 3. _________________________________
Objects with stronger attraction between their particles are solids. Objects that have weak attraction between particles are gases.
4.________________________________.
Vibrating, rotating , bumping into each other.
5. As the temperature increases, ______________
__________________________If the temperature decreases, ____________________.
Faster moving particles take up more space as they bump into each other causing the object to expand. As the temperature decreases, the particles get tighter together and the object contracts.

7. The particle model helps to explain the 3 states of matter:
GAS
LIQUID
SOLID
Attraction between the particles.
Distance between the particles.
Compressible?
Shape

8. Matter can be further classified according to its________________________.
Solid, Liquid, or Gas
________________________
Two or more types of particles ____
_____________________________
________________________________________________ (values DO NOT change)
Values of properties ____________
__________________________________________________________
Eg. Water (H2O) – _________
________________________
Eg. Salt (NaCl) – always _____
Eg. Salt Water – boiling point _______________ depending on the amount of salt in the solution (the more salt,_____________________)

9. Mixtures can further be broken down:
__________________ (Solutions)
______________________(Mechanical Mixtures)
-particles are __________________ ____________________________________________(uniformly mixed)
-have _________________________ ______________________________(can be seen)
-_____________ (can be colored) and__________________________
-can be further classified as:
___________________
-light_________________________
Eg. __________

10. Heterogeneous Mixtures
(Mechanical Mixtures)
Ordinary Mech. Mix.
Suspensions
Colloids
- _____________________ ______________________
-looks like one substance but ___________________ ______________________
-small particles of one substance suspended in another
-parts_________________
WILL _____________
-CAN be _____________ and will scatter light
Eg.
Eg.
Eg.

11. ____________________ -light easily passes though
______________________ -light is scattered by the particles in the liquid

12. Colloids Emulsions -a _______________ _________________
Eg. Milk, jelly, and salad dressing
PROBLEM: may quickly ________ ________________________________________________________