Study Guide

Quick meanings for every word. Pair Tier 3 words with pictures to support newcomers.

Word	Meaning
Groups	The columns of the periodic table. Elements in the same one share similar chemical properties.
Metalloids	Elements that have a mix of metal and nonmetal properties.
Metals	Elements that are typically shiny, bendable, and good at conducting heat and electricity.
Nonmetals	Elements that typically lack shine and tend to be brittle rather than bendable.
Periods	The rows of the periodic table.
Properties	The characteristics that describe matter, such as color, hardness, or melting temperature.
Boiling Point	The specific temperature at which a liquid turns into a gas.
Color	How something appears to the eye, based on the wavelengths of light it reflects.
Compounds	Substances made of two or more different elements chemically bonded together.
Conductivity	A measure of how well a material allows heat or electricity to pass through it.
Conservation of Mass	The scientific rule that mass is neither created nor destroyed — it just gets rearranged.
Density	A measure of how much mass is packed into a given amount of space.
Elements	The basic substances that make up all matter — each one cannot be broken down into anything simpler by chemical means.
Hardness	A measure of how well a material resists being scratched or dented.
Malleability	A measure of how easily a material can be bent or hammered into a new shape without breaking.
Melting Point	The specific temperature at which a solid turns into a liquid.
Periodic Table of Elements	A chart that organizes all known elements by their properties and atomic structure.
Phase Change	A change of state — like solid to liquid, or liquid to gas — without changing what the substance is made of.
Solubility	A measure of how well a substance dissolves in another substance, like sugar in water.
Viscosity	A measure of how thick and slow-flowing a liquid is.