1. Water Displacement
displacement occurs when an object is immersed in a fluid, pushing it out of the way and taking its place.
The volume of the fluid displaced can then be measured, as in the illustration, and from this the volume of the immersed object can be deduced

2.
This animation shows how a rubber stopper placed in a graduated cylinder will cause the water level to rise. Since the volume of the stopper is equal to the volume of water displaced and the initial and final mass is known, the density of the irregularly shaped stopper can be determined.

3. Density
Density- is a property that can be used to identify a substance.
Calculating Density:
Density = Mass
Volume

4. Density ******If the density is greater than 1 the object will sink
*****If the density is less than 1 the object will float
q   Wood has a density of 0.85 g/cm – it will float
Steel has a density of 7.81 g/cm- it will sink

5. *** Density- never changes Weight and volume do change

6. Matter
Anything that has mass
takes up space

8. Mass vs Weight Mass How much matter Weight How much mass
the effects of gravity

9. Calculating weight Weight = m * g Label in Newton (N) Three steps:
Ø     Formula
Ø     Plug in numbers
Solve and label your answer

10. Phase changes During a phase change particles are changing o Speed
Distance between each particle

11. 3 points where temperature changes – A,C,E 2 points where temperature doesn’t change- B, D

12. WHY ?? Particles are going through a phase change
Chang speed and how far they are apart

13. Physical properties Depends on the matter itself
Density, Mass, Weight, Volume, Color , Order, Texture

14. Depends on the reaction of the matter with other matter
Chemical properties
Depends on the reaction of the matter with other matter
Flammable
Corrosive

16. Heterogeneous mixture
mixture that does not appear to be the same throughout.
EX: Chocolate Chip cookies, Pizza

17. Homogeneous Mixture A mixture that appears to be the same throughout.
It is “well mixed.”
EX: Milk, toothpaste, and mayonnaise

18. Alloys- are metal solutions

19. Can be the same OR different kinds
Compound
Molecule
Element
More than 1 kind of atom
Can be the same OR different kinds
One kind of atom
Chemically combined
Ex: H20, Water, table salt
EX: Hydrogen gas
EX: uranium, calcium

20. 1. Sand 2. Salt 3. Pure Water 4. Soil 5. Soda 6. Pure Air
Classify each of the following substances as; an element, a compound, a solution, or a heterogeneous mixture.
1.  Sand   2.  Salt 3.  Pure Water 4.  Soil 5.  Soda   6.  Pure Air   
7.  Carbon Dioxide 8.  Gold    9.  Bronze   10. Oxygen 11.  Salad Dressing 12. Salt Water