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Vocab #9

8th grade vocab

Physical properties characteristics like hardness, luster, color, texture, density, and the way it splits.
Chemical properties characteristics like the ability to burn and the reactivity to acids.
Minerals Natural, sold materials found on Earth that are the building blocks of rock; each has a certain chemical makeup and set of properties that determines their use and value.
Ores minerals that are mined because they contain useful metals or nonmetals.
Fossil fuels natural fuels that come from the remains of living things; fuels give off energy when they are burned.
Rocks materials from earth that can be classified by their physical appearance. Each of 2 classifications is formed differently and can change, over time, from one type to another.
Trial Each set of repeated data in an experiment
Sample a portion of the total number of objects. It is used in estimation.
Mold fossil fossil that forms when sediments bury an organism and the sediments change into rock. The organism decays, leaving a cavity (hollow spot) in the shape of the organism.
Cast fossil fossil that forms when a mold is filled with sand or mud that hardens into the shape of the organism.
Created by: asarvis