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Science Vocab

Across
Atoms and molecules that make up substances.
The process of a substance changing directly from a solid to a gas.
A measure of the average speed of the particle of matter. Temperature changes as the particles move faster (warmer) or slower (colder).
The transfer of thermal energy from a warmer substance to a colder one.
The energy of motion of the particles of matter in a substance.
The temperature at which a liquid changes to a gas.
The process in which a gas cools to form a liquid.
A combination of two or more atoms.
A word used to describe an observation that can be seen by the unaided eye.
The basic building block of matter.
Down
A change from a liquid to a gas at a temperature that is lower than the boiling point.
Things you can't see with your unaided eyes.
The process in which a liquid cools to form a solid.
The temperature at which a liquid turns into a solid
The temperature at which a solid changes to a liquid.
Matter that has no definite shape or volume. A gas takes the shape and volume of its container. The particles are far apart and move randomly and rapidly.
Matter that has a definite volume but not a definite shape. A liquid takes the shape of its container. The particles remain close together and slide past each other in a fluid motion.
The simplest type of substance made up of identical atoms.
Matter that has a definite shape and volume and an organized arrangement of particles that remain very close together and vibrate slowly.