8th Earth Science Chapter 2

The change of state from a liquid to a gas below the boiling point of the liquid

attempt to show how the universe started

A pure substance composed of two or more elements chemically combined

sounds caused by vibrations too slow for the human ear to detect

object must be moving

A pure substance made of only one kind of atom

A change in matter that doesn't alter its chemical identity

A fluid state of matter in which particles are close together but can move freely about

The force of attraction between any two objects originating in the matter they contain

A change of state from a gas directly to a solid without becoming a liquid first

The change of state from a solid directly to a gas without becoming a liquid first

A change resulting from the joining/breaking of bonds between atoms to form different substance

A fluid state of matter made of extremely high-temperature ionized particles

Any change of state from a liquid to a gas

The change of state from a gas to a liquid by cooling

A charged atom or group of atoms

A measure of the amount of matter an object contains

The amount of space a sample of matter occupies

examples of nuclear changes

tells how many protons are in the nucleus

The hotness or coldness of a substance, stated in degrees

Distinct particles composed of two or more atoms bonded together

Anything that occupies space and has mass

The change of state from a liquid to a solid by cooling

The change of state from a solid to a liquid by warming

flow of thermal energy from a hot place to a cooler place

The smallest neutral particle identified as a chemical element

Ability to do work

sum of the kinetic energy found in a substance's particles

A material made of just one kind of element or compound

The physical form of matter described by rigidity, ability to hold shape, definite volume is

The force of gravitational attraction for an object's mass

Two or more substances mixed together but not chemically combined

A fluid state of matter in which particles move so fast; they have no attraction for each other

A change occurring in the nucleus of an atom when the nucleus splits or joins with another

type of light energy

A force acts on a moving object in the same or opposite direction of its motion

Matter and energy cannot be created or destroyed, but only changed from one form to another

Any push or pull on an object

starting source of energy within the sun

A rigid state of matter composed of particles in a fixed arrangement

The change of state from a liquid to a gas at the liquid's boiling point