1. JUST DO IT 3.19.12 Daily Riddle In Question Solid to liquid:
In Question
Solid to liquid:
Liquid to solid:
Gas to liquid:

2. Cytoplasm
Nucleus
Membrane
Splitting
Oval
Energy
Blood
Muscle
plant
10. Membrane 11. chlorophyll

3. Today in your notebooks
PT groups/famillies, PT brainpop
PT notes
Atomic trends
Atomic trends notes
Compounds and molecules, BP
Bonding notes
Atomic arrangements
Arrangements notes
Valence electrons ws
Valence electrons notes
Phys/chem change ws
Physical and chemical change notes

4. Physical and chem. Changes 3.19.13
1) 2) 3)
1) PHYSICAL CHANGE: Concerned with energy and states of matter. The substance does not change but may change phase. Ex) melting, freezing, evaporating, crushing/cutting. 2) CHEMICAL CHANGE: The substance changes at the molecular level. A new substance is produced. Ex) Burning, rotting, chemical reactions. 3) A phase change is a physical change b/c -the substance doesn’t change at the atomic level -you can turn it back into what it was

6. a. a hot glass cracking when placed in cold water - physical b
a. a hot glass cracking when placed in cold water - physical  b. melting copper metal - physical c. burning sugar - chemical  d. mixing sugar in water - physical  e. digesting food - chemical

7. a. perfume evaporating on your skin - b. butter melting - c
a. perfume evaporating on your skin -   b. butter melting -   c. wood rotting -   d. crushing a can- e. autumn leaves changing color-

8. 1. Which of the following would NOT be a physical change?
freezing water to make ice cubes 
b. melting gold to make jewelry 
c. burning gasoline in a lawnmower
d. boiling water for soup 
e. tearing a piece of aluminum foil
2. Which of the following is NOT a physical change? a. grating cheese b. melting cheese c. fermenting of cheese d. mixing two cheeses in a bowl