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Science Vocabulary

science vocab

TermDefinition
Law of Conservation of Mass Mass cannot be created nor destroyed, just change forms.
Reactant The materials of the reaction that cause it to happen
Product The materials formed from the reaction
Flammability Able to burn, or catch on fire
Precipitate Material formed as a result of chemical change
Phase Change Changing from one state of matter to another
Chemical Change Reaction that forms a new substance. Evidence includes: formation of precipitate,change of temperature, change of color, and formation of gas (bubbles).
Physical Property Characteristic that can be observed with your senses or measured.
Period A row on the periodic table
Group or family A column on the periodic table
Atomic Mass The average number of protons and neutrons in an atom
Element A pure substance that has the 2 or more of the same atoms
Compound Two or more elements chemically bonded, example water
Conductivity Able to transmit electricity, heat
Unconformity When a rock disturbs a series of undisturbed layers
Law of superstition In an undisturbed set layer of rock, the younger rock is on top and the oldest rock is on the bottom.
Half-life When the amount of a radioactive element is decreased by half after a period of time
Absolute dating Using radioactive elements to determine the EXACT age of a fossil, rock, or artifact.
Relative dating Using the Law of Superstition and index fossils to give an estimate of a fossil or rock layer's
Index fossils Fossils that we know the exact age, but use it for comparison
Created by: 8401743