Term | Definition |
matter | Anything that has mass and takes up space |
atom | The smallest particle of an element |
element | A pure substance that cannot be broken down into any other substances |
molecule | Created when two or more atoms join together |
molecule | can be made up of two or more atoms of the same element (like Hydrogen gas = 2 atoms of Hydrogen) or two or more atoms of different elements joining together (like water = 2 atoms of Hydrogen and 1 atom of Oxygen) |
compound | Created when two or more atoms of different elements join together |
expand | To get larger in size, volume or quantity |
Expand | when atoms gain heat energy, they move faster and spread out |
particles | A very small piece of a part, a tiny portion or speck |
thermal energy | Heat energy; the motion of molecules in a substance |
vibrate | A rapid, back and forth motion |
solid | Particles are closely packed together and vibrate in place |
Solid | has definite shape and volume |
solid | can become a liquid when heat is added |
liquid | Particles touch each other and are packed loosely together |
liquid | has definite volume but NOT definite shape – takes the shape of container |
liquid | can become a gas when heat is added |
gas | Particles in a gas have a lot of thermal energy and are in constant motion |
gas | Has NO definite volume or shape – take the shape of container when closed |
gas | Spread out indefinitely when container is not closed |
density | How much mass is present per given volume |
Density | = mass divided by volume |
density | g/cm3 |
solution | groups of molecules that are mixed up in even distributions |
solution | solutes are dissolved into solvents to create a _______________ |
solute | a substance(usually a solid) that is dissolved into another substance |
solvent | a substance(usually a liquid) that does the dissolving in a solution |
solubility | The ability of one substance (solute) to dissolve in another substance (solvent) |