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Exam- tri 2
Study vocab words.
30
Science
8th Grade
02/27/2013

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Term
Mass
Definition
Body of matter
Term
Volume
Definition
Amount of space an object has
Term
Density
Definition
The mass per volume of given material units:g/cm3
Term
Exothermic
Definition
A reaction that releases more energy then it uses
Term
Endothermic
Definition
A reaction that uses more energy then released
Term
Physical Change
Definition
Change that affects physical properties
Term
Chemical Change
Definition
Change- breaking/reforming of chemical bonds
Term
Element
Definition
A pure substance that cant be broken down into similar substances by physical/chemical means
Term
Atom
Definition
Smallest particle of a element that retains the chemical identity of an element
Term
Renewable Resource
Definition
A natural resource that can be replaced if used
Term
Non-Renewable Resources
Definition
A natural resource that is not replaced if used
Term
Fossil Fuel
Definition
Substance found in the Earths crust formed over 1,000,000 years ago for remains of dead organisms
Term
Reactant
Definition
Starting ingredient in chemical reaction
Term
Product
Definition
A new substance formed in chemical reaction
Term
Conservation Of Mass
Definition
Total mass of an isolated system, unchanged by interaction of its parts
Term
Strong Nuclear Force
Definition
Holds protons/electrons? in together in nucleus
Term
Isotopes
Definition
Atoms of same element that have different numbers if neutrons in nucleus
Term
Valence Electron
Definition
Electrons in highest, unfilled energy level of a atom
Term
Atomic Number
Definition
Number of protons in the nuclues
Term
Atomic Mass
Definition
Average mass of all known things in the nucleus (everything in the nucleus)
Term
Series Circuit
Definition
Only one path for current
Term
Parrell Circuit
Definition
More then one path for current
Term
Open Circuit
Definition
A circuit with a break, charge cant flow
Term
Closed Circuit
Definition
A circuit without a break, charge can flow
Term
Short Circuit
Definition
Branch in current that has low resistance
Term
Voltage
Definition
Measure of electric potential energy
Term
Current
Definition
Flow of electric charge carriers
Term
Resistance
Definition
How much flow for a given voltage
Term
Ohms Law
Definition
Current directly related to voltage and inversely related to the resistance
Term
Static Electricity
Definition
Tiny imbalance between positive and negative charge on a object
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