Extensive and intensive properties

Intensive . don’t depend on amount. density, color etc. internal characteristics that do not change

Extensive are amount related, ( mass, size, length etc)

table on 15 is good one to memorize

Forms of energy!!!

kinetic - energy of movementpotential- stored energy

Conservation of energy - energy can't be created or destroyed only change forms

Forms of energy!!!

kinetic - energy of movementpotential- stored energy

potential- storedkinetic moving

temepraturewe use celcius and Kelvin. NO Fahrenheit .why? cause Celcius more compatible with metric. no other major reason, but it is the accepted unit. Kelvin - the true SI unit, created so that coldest temp is what needed to make atoms stop moving. ABSOLUTE ZERO .

C+ 273 = K K- 273 = C

Matter -has mass takes up space. All things including air are in this.Mass- measure of the amount of matter something has. Instead of mass lets say inertia. Inertia is the resistance to change in motion. vs weight- takes gravity into account

STATES of MATTTERSolid liquid gas plasma, these do not change the matter so they are physical changes.Solid-definite shape and volume, particles are close together, they vibrate against each other and resist movement as a wholeLiquid-definite volume, not shape. Particles touch, flow easily as a whole, take shape of containerGas- no shape or volume expand to fit volume of container. Lots of space between molecules, constant motion.Plasma- no shape or volume and has charged particles ( sun) need excess amount of heat to become plasma

percent error! tells how far off an experiment is from where it is supposed to be

experiemental answer- expected answerexpected

answer

answer times 100

Physical properties/changes-those that can be physically changed, the matter remains the same. Size, shape, STATE

Chemical p/c- changes the composisition of the matter, burning, rusting, tarnishing, etc.

chemical reactions are written like math reactions

reactant + reactant = product + product

physical properties?

chemical properties?

Chem reactions have a basic look. Much like math relationship.Reactant + reactant ® product + product

This is usually exothermic, meaning it gives off heat.Some are endothermic, meaning take in heat.

3 things to look for prove chem reaction heat and light

gasprecipitate ( solid from 2 liquids)

other things happen in chem. Reactions, but these 3 are major signifiers

Types of mattercan be mixtures or pure substances

1. Mixture- 2 or more types of matter (retaining own properties) that can be separated by physical means. ,

salad, granite, rock, your backpackmixtures can be

Heterogeneous- can see different parts

throughout, ie. Wood, blood, Homogeneous- looks the same

throughoutie. Sugar in water, air

Pure substances- these are only one type of matter.

Elements- one type of atom, all are on the periodic table. Learn it

Compounds- chemical combos of elements. Sugar, salt etc. (if it has a chemical formula, it is a compound

Label the following as mixture or pure substance

1. chocolate milk 6. tin2. nylon 7. cookie batter3. steel 4. carbon dioxide5. Helium

8-9 of the choices above, please choose 2 compounds10. choose one mixture that is homogenous

Law of conservation of mass- in any chemical reaction, the total amount of matter that goes into the reaction has to be found somewhere at the end of the reaction.

( in science terms- mass cannot be created or destroyed, only converted into different forms)

Where ? - spill on table, into the air etc.