Matter
Anything that has mass and takes up volume.
matter
A transition from the liquid phase to the solid phase.
freezing
What is energy?
The ability to do work.
The components that make up a material.
composition
A transition from the solid phase to the liquid phase.
melting
Energy that is stored.
potential
An idea that has been tested and refined, or a paradigm for describing a particular topic.
theory
The arrangement of simple units within a substance.
structure
A transition from the gas phase to the liquid phase.
condensation
The energy of motion.
kinetic
A tentative explanation that has not been tested.
hypothesis
A state of matter having definite volume but no definite shape. The particles are close together but move freely past each other.
liquid
Changes that do not alter the identity of the
substance.
physical
A type of kinetic energy, involving the movement of particles within a substance.
heat energy
scientific law
A statement that describes observations that are true in widely varying circumstances. Scientific laws often describe mathematical relationships. However, they do not explain why something occurs; they only observe that it occurs.
Mixtures in which the components are
evenly blended throughout.
homogeneous
Changes that produce new substances.
chemical
A change that releases heat energy.
exothermic change
scientific method
A cyclical process of making observations,
formulating new ideas, and then testing those ideas through experiments.