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Science EOQ study cards
EOQ 3
41
Science
8th Grade
03/17/2012

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Term
What does something need to be considered matter?
Definition
1. mass
2. takes up space
Term
Mixture?
Definition
made of 2 or more substances that are together in the same place, but their atoms aren't chemically bonded
Term
heterogenous
Definition
can see different parts and can be seperated
Ex: Chex Mix
Term
homogenous
Definition
cant see differnt parts
Ex: Tea, coffee
Term
Volume
Definition
amount of space matter occupies
Term
volume is measured in...
Definition
cubic meters (m3)
Term
how you find volume of regular shaped object
Definition
length* width * height
Term
how you find the volume of an irregular shaped object
Definition
graduated cylinder ( water displacement)
Term
atom
Definition
basic particle from which all particles are made
Term
3 things in an atom
Definition
proton, neutron, electron
Term
physical change
Definition
when appearance of form of a substance changes, but no new substance is produced
Ex: broken glass
Term
chemical change
Definition
change in matter that produces 1 or more new substances
Ex: match burning
Term
density and it's formula
Definition
meausure of mass of a material in a given volume
d=m/v
Term
endothermic reaction
Definition
absorb energy from nearby matter, cold
Term
exothermic reaction
Definition
energy is released; usually heat
Term
mass
Definition
amount of material in object
Term
solid
Definition
definite shape and definite volume
packed tightly
Term
liquid
Definition
substance with a definite volume, but no shape
free to move
Term
gas
Definition
no definite shape or volume
Term
freezing point
Definition
liquid to a solid
Term
melting point
Definition
solid to a liquid
Term
surface tension
Definition
inward force or pull among molecules in a liquid that brings molecules on surface closer together
Term
viscosity
Definition
liquids resistance to flowing
Term
vaporization
Definition
change of state from liquid to gas
Term
evaporation
Definition
takes place on surface of a liquid
Term
condensation
Definition
change of state from gas to liquid
Term
sublimation
Definition
surface particles gain energy to form a gas
Term
neutron
Definition
part of an atom with no electric charge
Term
proton
Definition
carries positive charge
Term
electron
Definition
carries negative charge
Term
protons and neutrons
Definition
particles that make up the nucleus
Term
how many electrons fit on 1st electron shell
Definition
2
Term
how many electrons fit on 2 shell
Definition
8
Term
how many electrons fit on 3 shell
Definition
18
Term
protons in an atom
Definition
atomic number
Term
sum of protons and neutrons
Definition
atomic mass
Term
reactants
Definition
substances that undergo the chemical changes on the left side of a chemical formula
Term
products
Definition
new substances that form
what you finish with
on right side
Term
subscript
Definition
a number in a chemical formula that tells the number of atoms in a molecule
Term
coefficient
Definition
a number placed in front of a chemical formula in an equation
Term
law of conservation of mass
Definition
the fact that it is not created or destroyed in any chemical or physical change
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