What Topics do I need to know for the Final?
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Steps of the Scientific Method? | Ask a question, form a hypothesis, test the hypothesis, analyze the results, draw conclusions, communicate results
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| Mass? | The amount of matter an object is made of
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| Volume | The amount of space something takes up
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| Density | the amount of matter in a given space d=m/v
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| Physical properties | matter that can be observed or measured without changing its identity
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| Physical changes | a change that affects 1 or more physical properties of a substance
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| chemical changes | occurs when a substance changes into something with different properties
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| chemical properties | describes a substance based on its abilities to change properties
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| freezing | liquid to a solid
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| melting | solid to a liquid
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| condensing | gas to liquid
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| boiling | high temp. in a liquid
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| changes of state (of matter) | conversion of a substance from one physical form to another
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| sublimation | solid to gas
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| vaporization | liquid to gas (must be boiling)
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| evaporation | liquid to gas (not boiling)
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| Boyle's laws | states that when something's pressure goes up its volume goes down
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| Charle's laws | states that when something's temp goes up so does its volume
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| Elements | pure substance that can not be separated or broken down
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| atoms | atomic # (top #)
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| protons | # of atoms (+ charge)
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| neutrons | atomic weight atomic weight - # of protons
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| electrons | # of protons (- charged )
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| mixtures | 2 or more elements that are not chemically combined
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| compound | 2 or more elements that are chemically combined
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| work | when a force causes an object to move in that direction w= f x d work= joules
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| power | the rate at which work is done p= w/t
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| solute | dissolved to form a solution
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| solvent | substance in which solute is dissolved
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| solutions | appears to be a single substance but is not
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| solubility | amount of solute needed to make a saturated substance
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| homogeneous mixture | a mixture that is in uniform
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| heterogeneous mixture | doesn't have a uniform and has different properties
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| suspensions | mixture of materials that are dispersed through out
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| colloids | particles that are not heavy enough to settle out
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| alloys | solid solutions of metals or nonmetals that are dissolved
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| simple machines | lever, inclined plane, wedge, screw, wheel and axle, pulley, compound machine
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| compound machine | 2 or more simple machines working together
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| kinetic energy | energy of motion ke= mv ^2 / 2
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| potential energy | energy of position or shape p=w x h
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| newton's first law | object at rest stays at rest, object in motion stays in motion / unless a force is acted upon it.
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| newton's second law | states that the acceleration of an object is dependent upon two variables- the net force acting upon the object and the mass of the object
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| newton's third law | states that for every action (force) in nature there is an equal and opposite reaction
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| renewable | replaced naturally in nature/ reusable
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| nonrenewable | will eventually run out
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| metals | good conductors, shiny, pound able
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| metalloids | some characteristics of metals- not all
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| non- metals | no characteristics of metals
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| ductility | ability to be drawn or pulled into a wire
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| malleability | ability to be pounded into thin sheets
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| conductivity | electricity can pass through them
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| speed | how fast something is done s=d/t
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| velocity | speed within a direction v= d/t
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| acceleration | the rate of which velocity changes a= final v - starting v / time it takes to change
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| friction | the rubbing together of two objects
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Created by:
Rebecca Miedema
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