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Science EOG vocab

All of the vocabulary we have done in 8th Grade Science.

QuestionAnswer
Molecule The smallest particle in a chemical element or compound that has the chemical properties of that element.
Element The simplest form of a pure substance.
Compound Pure substances that are the unions of two or more element. Can be chemically broken down.
Mixture Two or more substances that can be physically separated.
Homogenous mixture Same throughout.
Heterogenous mixture Not same throughout.
Proton Positive charge, equal to electrons/atomic number.
Neutron Netural charge.
Electron Negative charge, equal to protons/atomic number.
Solution A homogenous, molecular mixture of two or more substances.
Ductile Metal capable of being drawn out in strands .
Valance electrons The outer shell of an atom.
Precipitate Solid made from a liquid during a chemical reaction.
Catalyst Something that speeds up a chemical reaction.
Exothermic Releases heat energy.
Endothermic Absorbs heat energy.
Biomass Material from living things used as an energy source.
Photovoltaic Uses electricity to make solar energy.
Sedimentary rock Formed through the deposition and solidification of material.
Metamorphic rock Made from high heat and high pressure.
Igneous rock Made from cooling and solidification of magma or lava.
Petrified fossils Fossil made of minerals.
Carbon fossils The remains of organisms converted into a carbon residue.
Isotope Atoms of the same element with the same amount of protons but different neutrons.
Radiometric dating Using the rate of decay of unstable isotopes to find absolute age of rocks or fossils.
Half-life How long it takes for the radioactivity of a certain isotope to fall to half its original value.
Carbon-14 Basis for radiocarbon dating.
Index fossil Fossils used to define the geologic time scale
Homologous structure Body parts of different organisms with the same structure but not the same function
Analogues structure Body parts of different organisms with same functions but not the same structure.
Vestigial structure Body parts that are unnecessary in an organism.
Taxonomy Branch of science responsible for naming/catagorizing different species
Niche An organisms job in an ecosystem.
Phenotype Physical makeup of an organism
Nitrification Nitrogen->nitrates
Ammonification Dead animals nitrogen turned into ammonia (next is nitrification).
Permability Able to pass through
Brackish water Saltwater and freshwater mix.
Necton Animals able to move wo/ water currents
Benthos The flora and Fauna found at the bottom of a water source
Upwelling Cold water from the bottom comes up to the top
Carbonic acid H2Co3
Created by: stephseogprep
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