Chemistry Review. Matter What are the 3 states of matter? SOLID, LIQUID, GAS Animation.
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Transcript of Chemistry Review. Matter What are the 3 states of matter? SOLID, LIQUID, GAS Animation.
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