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matter properties and changes
chapter 5
49
Science
8th Grade
12/08/2010

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Term
any charecteristic of matter that can be observerved without changing the identity of the mateirial
Definition
physical property
Term
what do physical properties include
Definition

color shape smell taste mass volume density

 

Term
amount of mass in a given volume
Definition
density
Term
what is the formula for density
Definition

m/v

mass/volume

Term
what can  density identify
Definition
unknown substances
Term
whether a substance is a solid liquid or gasat a particular temperature and pressure
Definition
state of matter
Term
what are the two types of physical properties
Definition
 size dependent and size independent
Term
what does size dependent properties consist of
Definition
length width height volume and mass
Term
what do sizeindependent properties consist of
Definition
density color state
Term
what can matter be classified as
Definition
acid or base
Term
what has a sharp smell and sour taste
Definition
acid
Term
acids hav a ph of what
Definition
between 0 and 7
Term
what contains acid
Definition
citrus fruits
Term
what feels slippery and has a bitter taste
Definition
base
Term
what is the ph of the base
Definition
between 7 and 14
Term
what is a base
Definition
a bar of soap
Term
what does it mean to have a ph of exactly 7
Definition
its water and it is not either an acid or a base
Term
charecteristic of something that allows it to change to something new
Definition
chemical property
Term
what do chemical properties include
Definition
flamability toxicity and the ability to react with oxygen
Term
what is an example of a chemical property of reactivity
Definition
when a half eaten apple turns brown in tha air
Term
what has a lower reactivity than any other matals
Definition
silver and gold
Term
what compounds change the chemical property of pool water
Definition
chlorine
Term
when water changes to more acidic  what does it eliminate
Definition
algae bacteria and insects
Term
standing water without any chlorine can become a breeding ground for which insect
Definition
mosquitoes
Term
what can make a pool unfit for swimming
Definition
plants algae and bacteria
Term
more acidic chlorinated pools can also irritate what for swimmers
Definition
eyes and skin
Term
acids and bases both have chemical properties that make them both
Definition
 useful and harmful
Term
acids can also do what to living organisms
Definition
harm
Term
tomato sauce reacts with what
Definition
aluminum foil
Term
what can acid rain damage
Definition
plant and animal tissue
Term
what is useful in industrys but burn skin
Definition
sulfuric acid
Term
strong bases can what
Definition
damage living tissue
Term
ammonia fumes can cause what
Definition
nosebleeds
Term
compounds made of matals and nonmetals and that are formed when acids and bases react
Definition
salts
Term
can be formed from a base of sodium hydroxide and hydrochloric acid
Definition
table salt
Term
what are useful salts that are used for batteries
Definition
calcium carbonate or chalk and ammonia chloride
Term
any change in size shape form or state where the identity of the matter stays the same
Definition
physical change
Term
what is an example of a physical change
Definition
cutting a watermelon into slices
Term
what is a common physical change
Definition
change of state
Term
wht are some changes in state
Definition

a.solid to liqiud/ice melting

b.liqiusdto solid/wter freezing

c.liqiud to gas/water boiling and creating steam

d.gas to liquid/water vopor condensing into water such as when dew forms

Term
one matierial changes into a different matierial with different properties or charecteristics
Definition
chemical change
Term
what are some examples of chemical changes
Definition
digestion photosynthesis paint drying and oil burning
Term
in a chemical change what happens
Definition
a new matierial is formed that are different from the starting matierials
Term
a chemical change can not be easily
Definition
 reversed
Term
what do the signs of a chemical change include
Definition

release of absorbtion of energy in the form of light heat or sound

formation of gas or solid

not from change of state

 

Term
leaves changing color indicate s a change in
Definition
 nature
Term
what is a physical change that takes place in long period of times
Definition
physical weathering
Term
chemical wethering can create
Definition
cave formations
Term
what is a form of unnatural chemicl change
Definition
acid rain
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