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Ives - Chemistry - 5th Grade
Chemistry Vocabulary
23
Chemistry
12/12/2011

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Term
atom
Definition
the smallest particle of an element that has all the properties of the element
Term
Change of state (or phase change)
Definition
phase change, or the change of matter from a solid, liquid, or gas into another state or phase
Term
Chemical change
Definition
the changing of a substance or kind of matter into a different kind of matter with different properties
Term
Compound
Definition
a substance made up of a combination of two or more elements held together by chemical bonds that can not be seperated by physical means
Term
Condensation
Definition
the changing of a gas into a liquid
Term
Density
Definition
the mass of a substance divided by its volume
Term
Electron
Definition
a negatively charged particle moving around the nucleus of an atom
Term
Element
Definition
the basic building blocks of matter; cannot be separated into parts by chemical means
Term
Evaporation
Definition
the changing of a liquid into a gas
Term
Gas
Definition
a state of matter that does not have a specific volume or shape and in which the particles are far apart
Term
Liquid
Definition
a state of matter with a definite volume but without a definite shape
Term
Mass
Definition
the amount of matter in an object
Term
Matter
Definition
anything that has mass and occupies space
Term
Microscopic
Definition
an object that is too small to be seen without a microscope
Term
Mixture
Definition
two or more substances that are mixed together but can be separated out because they are not chemically combined
Term
Molecule
Definition
the smallest particle of a substance made of combined atoms that has properties of that substance
Term
Neutron
Definition
a particle with no electrical charge in the nucleus of an atom
Term
Nucleus
Definition
the center of an atom where the proton and neutrons are contained
Term
Physical change
Definition
a change in some properties of matter without forming a different kind of matter
Term
Proton
Definition
a positively charged particle in the nucleus of an atom
Term
Solid
Definition
a state of matter in which material has a definite volume and shape
Term
Solution
Definition
a mixture in which a substance breaks up into its most basic particles and spreads evenly through another substance
Term
Volume
Definition
the space that an object takes up as expressed in cubic units