Vocabularies

Vocabulary page 290 


Mass: the amount of matter in an object.
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Volume: the amount of space an object takes up.
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Weight: (on Earth) a measure of the force of gravity between Earth and an object.
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Density: a measure of how tightly packed matter is; the amount of mass contained in a given volume.
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Buoyancy: the upward push on an object by the liquid (or gas) the object is placed in.
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Conduct: allow heat or electricity to flow through readily.
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Insulate: not allow heat or electricity to flow through readily.
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Vocabulary page 306


Element: a basic building block of matter; a pure substance that cannot be broken down into anything simpler.
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Compound: a chemical combination of two or more elements into a single substance.
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Atom: the smallest unit of an element that still has the properties of the element.
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Proton: a particle with a positive charge in the nucleus of an atom.
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Neutron: an uncharged particle in the nucleus of an atom.
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Electron: a particle with a negative charge moving around the nucleus of an atom.
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Nucleus: the dense center part of an atom.
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Molecule: a group of more than one atom joined together that acts like a single particle.
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