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7th Gr/Science Terms
Question | Answer |
---|---|
The bottom support of anything. | Base |
A chemical reaction. The rearrangement of the atoms of one or more substances and a change in their chemical properties. | chemical change |
a property or characteristics of a substance | chemical property |
composed of two or more elements | compound |
the state or quality of being dense | density |
an elementary particle that is a fundamental constituent of matter, having a negative change of 1.602 x 1.602 × 10^ −19 coulombs | electrons |
substances that cannot be separated into simpler substance | element |
a substance possessing perfect molecular mobility and the property of indefinite expansion | gas |
composed of molecules that move freely among themselves | liquid |
a body of coherent matter, usually of indefinite shape and often of considerable size | mass |
a compound usually having a sour taste and capable of neutralizing alkalis and reddening blue litmus paper, containing hydrogen that can be replaced by a metal or an electropositive group to form a salt, or containing an atom that can accept a pair of ele | acid |
a particle of matter indivisible by chemical means. It is the fundamental building block of elements. | atom |
a pointing or directing device, as a pointer on the dial of an instrument to show pressure, temperature, speed, volume, or the like. | indicator |