Bellringer 11-7-20131. What are the 2 most basic

categories of matter?2. If you shine a flashlight through a

glass of KoolAid and then a glass of water with a little milk mixed in, which one(s) would you see the light beam going through the glass?

a. Kool-Aid b. Milky waterc. Both

What is Matter? It has mass and takes up

space Everything around us is matter

ON A PIECE OF NOTEBOOK PAPER, MAKE THE FOLLOWING GRAPHIC ORGANIZERPhysical Properties Chemical

Properties

Physical Changes Chemical Changes

Physical Properties Definition: can be observed without

altering the chemical composition of a substance

Examples: color, texture, malleability, solubility, mass, volume, density

Malleable: capable of being extended or shaped by beating

Play Dough: Physical Properties

Color?Texture?Malleability?Mass?Solubility?

Physical PropertiesPhysical properties can be described as being intensive or extensive.

Extensive Properties:•Dependent on size.•volume, mass, and length

Intensive Properties:•do not change with the sample size

•can be useful in identifying a substance

color, density, viscosity, temperature, solubility, and states of matter.

Chemical PropertiesDefinition: the ability of a

substance to combine with or change with other substances.

Toxicity, reactivity, flammability, radioactivity

Play Dough: Chemical Properties

Toxicity Reactivity Flammabilit

y Radioactivi

ty

#1The boiling point of a certain alcohol is 75 degrees CelsiusPhysic

al

#2Copper forms green copper carbonate when in contact with moist airChemic

al

#3Table salt dissolves in water Physic

al

#4Copper is a good conductor of heat and electricity

Physical

#5Magnesium burns brightly when ignitedChemic

al

#6Iron is more dense than aluminum

Physical

What’s the Difference? Matter can change Examples: Freeze, cut, burn,

etc. 2 types of changes

1. Physical changes2. Chemical changes

Physical Changes Definition: when the state or

form of matter is changed physically or mechanically

Clue: still the same stuff Examples: breaking, cutting, freezing,

melting, etc. Ask yourself…”Can it be turned back into how it started?” Yes

Chemical Change Definition: takes place on a

molecular level (reaction) and produces a new chemical substance.

Clue: new stuff, color etc. A chemical change always

involves a chemical reaction

Where is the Evidence???

Evidence of chemical change: color change, gas production, and release of heat, light, odor, or sound.

Examples: Burning (combustion), rusting, tarnishing and fermenting

ice melting

burning a chemistry book

melting iron

frying an egg

fireworks exploding in the sky

turning wood into a baseball bat

baking a cake

sharpening a pencil

sulfuric acid added to sugar

http://www.youtube.com/watch?v=nqDHwd9rG0s

carving a watermelon into a creepy looking face

pouring liquid nitrogen into a bowl and watching it vaporize

Exit Ticket: A chemist is looking to describe a chemical

with a intensive property. Which of the following is an intensive property? a. Mass is 6.7gb. Boiling point is 500 Cc. Volume is 4 cm3

Label as physical or chemical: Ice meltingBaking a cake Iron rusting