1. Examples: color, texture, density, taste, odor and how it moves.
Physical Properties
Physical traits of an object. It is all of the things that you can see (or sense with any of your senses).
Examples: color, texture, density, taste, odor and how it moves.

2. Density
The more closely packed together the particles are the more dense it is.
The more loosely packed particles the less dense something is.
Density = mass ÷ volume
Easy example – golf ball vs. ping pong ball

3. - If the mass is greater than the volume it will sink.
Mass > volume object sinks
Example: mass of golf ball is 45 g and volume is 40 mL ÷ 40 is greater than 1
- If the mass is less than the volume it will float.
Mass < volume object floats
Example: mass of ping pong ball is 10 g and volume is 35 mL ÷ 35 is less than 1

4. Which is more dense????
1 ton of feathers or ton of bricks

5. Conductivity
Definition: how well heat and electricity move through an object.
Good Conductors: all metals (copper) because the particles are close together.
*Bad conductors: Gasses – it takes a long time to heat up a room due to the particles being spread far apart.

6. Malleability
Definition: a property of a metal describing the ease at which it can be hammered, pressed or rolled into thin sheets.
Metals vary in how easy they can be shaped.
Gold is the most malleable.
Heating can increase malleability.
Silver, copper, aluminum, lead, tin, zinc, and iron are also very malleable.
Example: The penny that you can make at the zoo or as a souvenir while on vacation

7. Ductility
Definition: the ability of metal to be pulled into a thin wire or a band.
Examples: copper makes good
wire for your stereo system or for the wiring in your house.
A wedding or engagement ring is in a band shape and made of platinum, gold or silver.

8. Solubility
Definition: the ability of something to be dissolved into another.
Examples:
*Water and hot chocolate
*Sugar and iced tea
*Vitamins dissolve into your blood
*Laundry detergent dissolves in water
* Oil cannot dissolve in water
If a substance can dissolve, it’s soluble. If it cannot dissolve, it’s insoluble.

9. State or Phase of Matter
This simply means what form the object in.
4 states of matter.
Solid
Liquid
Gas
Plasma (found in fire, stars , lightning
and space)

10. Solid molecules: Liquid molecules: Gas molecules: Hold their shape
Take shape of container,
they flow, moving slowly
Gas molecules:
Take shape of container, can change volume, moving fast, flow

11. Example: water boils at ______ water vapor condenses at ______
Every substance has a specific temperature it melts at and boils at that can be used to identify it:
Example: water boils at ______ water vapor condenses at ______
ice melts at _________
water freezes at _________
100ºC
100ºC
0ºC
0ºC

12. Physical Change
-A change that alters the form or appearance of material but does not make the material into another substance is called a physical change.
-Examples include: chopping wood, bending wire, coloring on paper or molding clay.
-A change in state (or phase) is also a physical change. Water in the form of a liquid, or frozen as ice, or in the gas phase as water vapor are all the same substance – H2O!

13. Chemical Properties and Changes

14. Chemical Properties Chemical Properties Flammability – ability to burn
Example – wood can burn
2. Reactivity – ability to react with other substances to form new substances
Example- Iron can rust and meat can rot

15. Chemical Change-
A substance changes into one or more new substances with new and different properties.
Example of a chemical change- Burning wood
- when you burn wood it turns
into ash. It is no longer wood
once it is burned!
- The ash looks different and can no longer burn!

16. 1st Sign of Chemical Change is..
COLOR CHANGE:
-A drastic change in color that can’t be reversed.
-Change comes from within, it is not added.
Examples-
Leaves changing color in the fall
Bleaching your teeth
Bleaching paper or fabric

17. 2nd Sign of Chemical Change is..
PRODUCTION or RELEASE OF GAS
When a gas is released as a result of the chemical reaction. The gas may be an odor, smoke, or bubbles.
Examples-
Gasoline being burned by cars releases carbon monoxide gas and smoke
Oxygen (gas) is being released from plants as a result of photosynthesis
A baked cake smells different than its batter.
Popping popcorn produces a new smell
Baking soda and vinegar produce bubbles from the release of CO2 (carbon dioxide)

18. 3rd Sign of Chemical Change is....
Production of light
When light results from a change.
Example-
Fireworks: when a firework goes off, it produces a spark
Lighting a match produces light

19. 4th Sign of Chemical Change...
Change in temperature
Any time heat is produced due to a chemical reaction.
Change in heat comes from within the reaction, not from its environment.
Example-
Pouring water into acid increases temperature
Burning an object produces heat
Lighting a match
Acid breaking down the food in your stomach produces heat
Instant ice packs get cold when mixed
A battery gets warm after using it

20. 5th Sign of Chemical Change is...
Precipitate forms:
This is a solid (like a powder) that comes from mixing 2 liquids
Only happens with certain liquids
The solid sinks to the bottom since it’s insoluble (see picture)

21. Chemically Changing Matter

22. Chemically Changing Matter

23. Chemically Changing Matter

24. Chemically Changing Matter

25. Warm up 11/10
Think of 2 examples of physical changes & 2 examples of chemical changes you have seen around you (outside of science).  
What were the indicators of a chemical change that led you to believe this was a chemical change?

26. I made spaghetti for dinner last night
I made spaghetti for dinner last night.  I boiled water and then added my noodles. I cooked the beef and mixed it with tomato sauce.  What parts of dinner prep were chemical and what parts were physical?