2020 Science End of the Year Review

Front

a possible explanation for an observation that can be tested by scientific investigations

Back

Hypothesis

Front

A rule that describes a pattern in nature.

Back

scientific law

Front

a positively charged particle in the nucleus of an atom

Back

proton

Front

a neutral particle in the nucleus of an atom

Back

neutron

Front

a negatively charged particle that occupies the space in an atom outside the nucleus

Back

electron

Front

Atoms of the same element that have different numbers of neutrons.

Back

isotope

Front

an atom that is no longer neutral because it has gained or lost electrons

Back

ion

Front

a small particle that is the building block of matter

Back

atom

Front

a substance that consists of only one type of atom

Back

element

Front

a change in matter in which the substances that make up the matter change into other substances with different chemical and physical properties

Back

chemical change