Karteikarten
science
Karten in diesem Stapel (90)
- 1what are the 2 characteristics of all matter?mass and volume
- 2massthe amount of matter in an object
- 3volumethe amount of space that an object occupies
- 4An object's _____ is affected by gravitational forceweight
- 5mass stays the same no matter where you are in the universe and...weight changes depending in your location in the universe
- 6When matter undergoes a _____ change, its shape or form changes, but its identity remains the same.physical
- 7when matter undergoes a ____ change, its identity and properties change.chemichal
- 8what are the indications that a chemical change has taken place?1. change in color
2. sound
3. temperature change
4. gas formation
5. light
6.precipitate - 9volume is measured in ?liters
- 10mass is measured in ?grams
- 11weight is measured in ?pounds or newtons
- 12upon what two things does density depend?mass and volume
- 13what is the density of water?1.0 g/cm3 (cubed)
- 14calculate the density of a plastic cube that has a mass of 10g and volume of 20cm3d= m/v = 10/20 = 0.5 g/ cm3
- 15what are the four states of matter?solid, liquid, gas , and plasma
- 16is the state in which matter has a definite shape and volume.solid
- 17is the state of matter in which does not have a definite shape or volume and whose particles have broken apart.plasma
- 18is the state in which matter takes the shape of its container and has definite volumeliquid
- 19solid particles-close together
-vibrate
-ordered - 20liquid particles-close together
-move past each other
-less ordered - 21gas particles-least ordered
-moving fast
-far apart - 22plasma particleslike a gas but electrons have broken away
- 23examples of plasmafluorescent light/ fire/ northern lights/ lighting
- 24—solid
- 25—gas
- 26—liquid
- 27Boyle's Lawpressure increases= volume decreases
and vice versa - 28charles' lawtemperature goes up= volume goes down and vice versa
- 29Pascal's principlepressure in fluid same throughout
- 30how is matter changed from one state to another?energy is added or removed
- 31liquid to gasvaporization
- 32gas to soliddeposition
- 33solid to liquidmelting
- 34gas to liquidcondensation
- 35liquid to solidfreezing
- 36solid to gasdeposition
- 37A pure substance can be aelement or compound
- 38What are some properties of elements ?1. all particles alike
2. have unique properties
3. can't be broken down
4. can join together to form compounds - 39metalsconduct thermal energy, shiny, malleable.
- 40nonmetalsdull, brittle, does not conduct thermal energy
- 41metalloidssemi conductors; properties of both metals and nonmetals
- 42How is a mixture different from a compound?in mixture each substance keeps its own properties
- 43Name the method for separating a solution?1. centrifuge
2. magnet
3.distillation - 44what are the elements that make up water?hydrogen and oxygen
- 45what are the elements that make up table salt?sodium and chlorine
- 46what are some examples of colloids?milk, whipped cream,mayonnaise, jello
- 47what will happen if a suspension is allowed to sit undisturbed?particles settle to the bottom
- 48difference between a dilute and a concentrated solution?dilutes are weak : only a little solute
concentrated solutions are stronger : lots of solute - 49In what type of mixture are the particles easily seen?suspension
- 50what did Democritus, Dalton, Thompson, Rutherford, and Bohr all have in common?they each contributed to the atomic theory
- 51the discovery of what particle proved that the atom is not indivisible?electron
- 52In Thomson's "phan-pudding" model of the atom , the plumps representelectrons
- 53In his gold foil experiment, Rutherford concluded that the atom is mostly empty space with a small,massive, positively charged center becausemost particles passed through, some were deflected and a few bounced back
- 54—modern
- 55—rutherford
- 56—Thomson
- 57—bohr
- 58order of the contribution of the atomic theorydalter, thomson,rutherford,bohr, modern
- 59An atom has not overall charge if it contains equal numbers ofelectrons and protons
- 60proton1. positieve
2. 1 amu
3. nucleus - 61neutron1. neutral
2. 1 amu
3. nucleus - 62electron1. negative
2. 0 amu
3. cloud - 63A=P=EATOMIC NUMBER= PROTONS=ELECTRONS
- 64M-A=Nmass- atomic number = neutrons
- 65malleabilityphysical change
does it bend? - 66State of matterphysical change
is it solid? liquid? gas? plasma? - 67Densityphysical change
D=m/v - 68Reactivitychemical change
will it rust? oxidation - 69Ductilityphysical change
can it be pulled into a wire? - 70Solubilityphysical change
will it dissolve in a liquid? - 71flammabilitychemical change
can it catch fire? - 72exothermicenergy is released or removed
- 73endothermicenergy is absorbed
- 74Atomic numbernumber of protons an neutrons in the nucleus
- 75Atomic massweighted average of the masses
- 76mass numberthe sum of protons and neutrons in an atom
- 77protona positively charged particle with a mass of 1 amu
- 78Electron cloudwhere electrons are found
- 79Electronnegatively charged particles found in all atoms
- 80Nucleusthe region in an atom that contains most of the mass
- 81neutronparticles of the nucleus that have a neutral charge
- 82ElementA pure substance that cannot be separated into smaller substances
- 83compounda pure substance made of 2 or more elements that are chemically combined has a definite ratio of component
- 84Pure substancemust be either an element or compound
- 85Suspensioncan be separated by filtration
- 86solutethe substance that is dissolved to form a solution
- 87solventthe substance in which a solute is dissolved to form a solution
- 88mixtureA combination of 2 or more substances that are not chemically combined
- 89colloida mixture in which the particles are dispersed through out but are not near enough to settle out
- 90solutionis composed of particles of 2 or more substances that are distributed evenly amongst another
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- Karteikarten am science, erstellt von danycd00 am 11/12/2014.
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