Chemistry Review

Matter

• What are the 3 states of matter?• SOLID, LIQUID, GAS• Animation

Physical & Chemical Characteristics

PHYSICAL CHEMICALChanges its appearance physically

Changes what it is made up of (changes the atoms to make a new thing); reacts

Properties

• What is a property?• Describes, talks about it’s ability to…• Can be physical or chemical• Has it CHANGED yet?....• NO• Does it describe it/have ability to change?

Examples of Properties

• Front Desk:PHYSICAL PROPERTIES CHEMICAL PROPERTIES

Changes

• When it actually changes• Physical: changes size, shape, but its still the

same thing• Chemical: changes what it completely is,

chemical reactions

Examples of changes

• Tearing paper• Burning paper• Breaking wood• Campfire• Mixing kool aid• Cooking a cake

Physical change

Physical change

Physical change

Chemical change

Chemical change

Chemical change

Property vs. Change

• Property = description or could change in the future

• Change = change• 5 evidences of a chemical change• PCOGT – “Pirates can obtain great treasures”– Precipitate (solid forms)– Color change– Odor(smell)– Gas forms– Temperature change– Evidence of a chemical change– http://resources.educ.queensu.ca/science/main/concept/gen/g09/N.%20Sabet/precipitation.jpg

Property or Change?

• Boiling point• 2 different liquids mix bubbles• Food coloring in water• Burning an egg• It has a yellow color• It produced a smell

Property

Property

Property

Change

Change

Change

• Which of the following is an example of a chemical property of water?– A. Boils at 100 C– B. Is transparent– C. Has no odor– D. Reacts with calcium

Is it still water (H2O)

Transparent = see through/clear

No smell

Reacts = chemical reaction

• Which of the following is an example of a physical property of hydrogen? It

• A. Is less dense than air• B. Reacts with oxygen• C. Is highly flammable• D. Forms hydrochloric acid

PHYSICAL PROPERTY

Don’t freak out

• Take your time• Use tools• Read the entire question• Look at the graphs and tables