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55 terms

physical science

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physical property
an aspect of matter that can be observed or measured without changing it, used to describe or define a object
density physical
the amout of mass per volume/ what kind of property is it
luster physical
how shiney or dull an object is/what kind of property is it
boiling point physical
the temp a liquid becomes a gas/what kind of property is it
melting point physical property
the temp a solid becomes a liquid/ what kind of preperty is it
texture physical
the type of surface of a material/what kind of property is it
color physical
the color of an object/what kind of property is it
hardness physical
how well a material withstands the application of force/what kind of property is it
ductility/malleability physical
being able to be stretched or compressed without breaking/what kind of property is it
chemical property
may be only observed by changing the chemical identity of a substance
flammability ph reactivity bonding type
name all 4 chemical propertys
density
the amount of mass "stuff" in an object mass diveded by volume g/m3 or g/l
1.00 g/l
density of water
sinks
objects more dense then 1.00
floats
objects less dense then 1.00
ph scale
the scale used for measuring the acidity or alkalinity (base) of a substance
acid
0-6 on ph scale
neutral
7 on scale
base
8-14 on scale
more acid
closer to 0 on scale
more basic
closer to 14 on scale
physical change
any change in an object that does not resolve in the production of a new substance
breaking cutting or crushing
3 ex of physical change
phase change
a change in a state of matter
chemical change
substances are changed into different substances
new color chem change
leaves
energy is absorbed or realeased chem change
release of light, change in temp
odor changes chem change
spoiled food
reacts with oxyegen chem change
oxidizing or rust
production of solid or gas chem change
burning/bubbles
not easily reversible chem change
can you turn somke back into wood
solid
very low molecular vibration, low energy level, tightly packed, do not flow, takes shape of container
liquid
moderate amount of molecular vibration, moderate energy level,flows,takes shape of container,loosely bonded together
gasses
high amount of molecular vibration, high energy level,free moving (not bonded together), do not take shape of container
melting
solid to liquid
vaporization
liquid to gas
condensation
gas to liquid
freezing
liquid to solid
sublimation
solid to gas
deposition
gas to solid
heat
total amount of thermal energy, includes kinetic (molecular vibration) energy and the amount of molecules
temperature
average measure of kinetic energy in a system
iceburg cez more molecules
which has more heat iceburg or cuo of hot water and why?
up
at a phase change in a heat curve energy is being built____
break
energy in a phase change in a heat curve is used to ______ the bonds
pure substance
matter that contains only 1 kind of particle,cannot be seperated by physical means
compound
2 or more elements bounded together
mixture
matter that is made up of 2 or more pure substances, can be seperated by physical means
homogeneous mixture
mixture that is the"same" throughout, compleatly dissolve and has a uniform(same) composition
solution
made up of small particles, looks clear, nonfilterable, homo
solute
being dissolved
solvent
doing the dissolving
colloid
made up of large particles, looks milky, nonfilterable, homo
heterogeneous mixture
mixture that id "different" throughout. can be pulled apart and is not in uniform
suspension
visable particles, filterable hetero