Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
science final bw
| Question | Answer |
|---|---|
| when inserting a rubber stopper into a glass tube what do you do | use a turning motion and apply a lubricant |
| always point a test tube where when being heated | away from you and others |
| you should know where safety equiment is and | how it works |
| what is the scientific method | general ways to help organize your thinking for an experiment |
| list the 6 steps of scientific method | -observe -formulate a question -research and collet data -from hypothesis -test hypotheis -observe |
| what is a hypothesis | purpose an answer to your question based on observations/ educated guess what you think |
| what is the variable in an experiment? | changes |
| what is the control | stay the same |
| what are the basic units | meters liters grams |
| define mass | amount of matter in an object |
| define volume | a measure of the size of a body or region in a a shape |
| a volume of a regular solid is measure in what units | cm3 |
| a mililiter is equivalent in volume to cm | cm3 |
| define meniscus | curved water line in a tube |
| what is voulme forumla | lxwxh |
| what is density | how packed the molecues are |
| what is density | m=d/v |
| what are 2 kinds of properties | chemical properties- how substancces changes into a new cubstance physical -observe changes that dont stay for forever |
| state of law conservation of mass | mass can ot be created or destroyed but it can change forms |
| should there be a changein mass when one subsatnce dissolves in another | no mass cant change |
| should there be a mass change when a substamce melts | no mass cant change |
| list 4 phases of matter | sollid liquid gas plasma |
| what are the two important characteristics of a solid | have a definite shape and voulme |
| what are the characteristics of a liquids? | have a indefinite shape but a definite voulme |
| what are the characteristics of a gas | have a indefinite shape and voulme |
| list the types of phase changes | melting freezing condensation voling point sublimation |
| what is the difference between a physical changes and a chemical change | physic-when something physical happens chemical-changes into a new substances |
| whats is melting? meliting point | when a solid changes to liquid, the temp in which the solid goes to liquid |
| what is freezing and point | liuid-solid, the temp. when liquid-solid |
| difference between evapartion vs boling | evap-goes away boli-still there at highest point |
| condensation? | gas-liquid |
| sublimation | solid-gas |
| what happens to the temp. during a phase change | no change in temp. |
| evapartion occurs only at the ----------- of a liquid | surface |
| when water --------- it changes into steem | boils |
| the temp. when a liquid becomes a gas is its --------- | boling point |
| an uncovered liquid changes to a gas at room temp. by the process of ------------ | evaporation |
| the ice in the water bath helped the gas molecules to ------------- | condense |
| the boling point of a substance is a ----------- property because it can help you identify the substance | charcteristic |
| the faster an objects particles move | higer |
| which of the following will not affedt the point at which a substance freezes | volume |
| the metric unit for temp. is | degrees celsuis |
| when heat is added to a substance the molecules | speed up |
| when heat is removed from a substance the molecules | speed up |
| the phase when the temp. is lower then colder point is a | solid |
| the phase when the temp. is higher than the freezing point is a | liquid |
| when ice is heated it ------ into water | melts |
| when water is put into the freezer it --------- into ice | freezes |
| when looking at a freezing point graph the phase change occurs on the ------- of the graph | plateau |
| what is an element | a substance that cannot be separted or broken down |
| what is an atom | the smallet a qunit of an atom |
| what are chemical symbols | name of the elements on the perioic table of elements |
| what are compounds | substance made up of atoms of 2 or more different elements |
| what are chemical formulas | 2 atoms togther |
| what is the difference between subscripts and coefficients | subscripts small behind the element coefficients in front of element and big number |
| what is a chemical equation | representation of chemical reaction that uses symbols to show the relationsdihp between that recantsand the products |
| 3 subatomic particles | proton electron neutron |
| charges of subatomic particles | pro-postive ele-no charge neu. negative |
| location of subtomic particles | pro-nucles ele-nucles neu-every ring outside of the nucles |
| what is the atomic # | the number of protons in the nucles of the atom |
| where is the majority of an atom mass loacted | nucleus |
| what is the atomic mass | how much an atom weighs |
| what is an isotope | neutrons are different |
| what is an ion | when the electron gained a # or losted a # |
| what is a neutral atom | when everything is the way its supposed to be |
| dfine endothermic | absorbs heat energy feels cold |
| define exothermic | releases heat enegrey -feels hot |
| name 5 factors that can affect the of a chemical reaction | temp. surface area concentraion pressure catalysts |
Created by:
100000114331076
Popular Physical Science sets