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Crookse 7S4

Seventh Grade Science 4

QuestionAnswer
Atoms The tiny particles that are the building blocks of all chemical elements.
Element A pure chemical substance that has all the same type of atoms. These substances can be found on the Periodic Table.
Molecules The building blocks of all substances, except the elements. These are made up of atoms joined by bonds (attractive forces between positive and negative electrical charges).
Nucleus The center or core of an atom that is made up of protons and neutrons (Nuclei is more two or more).
Nuclear Reaction The breaking apart or joining together of nuclei within atoms.
Heat Energy The energy involved in the movement of atoms and molecules
Light Energy The energy involved in the motion of electromagnetic waves.
Amplitude The distance from the rest position to the maximum arc of a wave. This is related to the height of the wave.
Wavelength The distance between two corresponding parts of a wave. For example, the distance from one crest to the next crest (or trough to trough).
Frequency The number of waves that pass a given point in a certain amount of time.
Created by: crookse
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