| A | B |
|---|
| Matter | Anything which takes up space and has mass. |
| Weight | A measurement of the pull of the earth's gravity on the mass of an object. |
| Gravity | A physical law that causes matter to be pulled to the center of the earth...or otherwise remain on land rather than floating freely in the atmosphere. |
| Atoms | The locations of matter particles within an object. |
| Space | The unoccupied areas between matter particles within an object. |
| Volume | Amount of space that an object occupies. |
| Mass | The measure of the matter contained in an object. |
| Density | The amount of mass in a volume of substance. |
| Color | What the eye sees when matter relects some types of light. |
| Luster | A distinctive sheen when light reflects from some smooth-surfaced objects.. |
| Porosity | The amount of space beween particles of matter. |
| Bouyancy | How well an object floats in liquid. |
| Energy of the Molecules | The energy of moving molecules within an object can produce up to 4 different states of matter in objects.. |
| Gas state | Highly enegetic molecules which bounce all around the area they occupy. |
| Liquid state | Molecules have less energy than that of gas. |
| Solid state | Molecules that have the least amount of energy. |
| Plasma state | Extremely energetic molecules which have electrical charges. |
| Amorphous state | Between a solid and a liquid. |
| Proton | Part of an atom that has mass and a positive electrical charge. |
| Atom's nucleus | The center of an atom. |
| Electron | Move around an atom's nucleus, have very little mass, and a great amount of kinetic energy. |
| Neutron | Particles in the nucleus of an atom but have mass and no electrical charge. |
| Chemical change | Changes to a substance which turn it into another substance. |
| Transubstantiation | A unique change that is neither physical nor apparently chemical. |
| Elements | Different kinds of atoms. |
| Kinetic energy | Energy of motion. |
| Atomic number | Number of protons in the nucleus of an atom. |
| Atomic mass | Amount of mass of an atom which equals the number of protons plus neutrons in the nucleus. |
| Physical characteristics of an element | Are determined by the protons and neutrons of an element's atoms. |
| Chemical characteristics | Are determined by the electrons of atoms. |
| Periodic table | Method of arranging the elements systematically. The elements are arranged by atomic number which is the number of protons in the nucleus of an atom of an element. |
| Chemical symbols | Short names for the elements which make it easier to write the names of the elements. |
| Compounds | Elements combined together. |
| Molecule | Smallest part of a compund which still has all of the characteristics of the compound. |
| Chemical reaction | When 2 elements bond together chemically. |
| Reactants | The elements in a chemical reaction. |
| Product | The compound that is formed by reactants. |
