Term | Definition |
Matter | Anything that has mass and takes up space |
Mass | Amount of matter in an object |
Weight | Measure of the gravitation force on an object |
Volume | Amount of space an object takes up |
Density | A measure of amount of mass in a given volume |
Physical Property | Substance that can be observed and measured without changing the identity of the object |
Chemical Property | Substance's ability to change into a new substance with different properties |
Physical Change | Change that affects one or more physical properties of a substance |
Chemical Change | Occurs when one or more substances change into entirely new substances |
Law of conservation of mass | Ordinary chemical and physical changes, mass is not created or destroyed but only transformed into different substances |
Atom | The smallest unit of an element that maintains the properties of an element |
Element | Made up of one or more of the same kind of atom chemically combined |
Compound | Made up of different kinds of atoms chemically combined. |
Mixture | Contains a variety of elements and compounds that are not chemically combined with each other |
Pure substance | Substance that has definite physical and chemical properties such as appearance, melting point, and reactivity |
Heterogeneuous | Mixture that does not have a uniform composition |
Homogeneous | Substances are evenly spread throughout |
Solid | Substance has a different volume and shape |
Liquid | Substance has a definite volume but not a definite shape |
Gas | Does not have a definite volume or shape |
Freezing | The change in state when a liquid becomes a solid |
Melting | The change in state when solid becomes a liquid |
Evaporation | As a liquid is warmed, its particles gain energy, Some particles gain enough energy that they escape from one surface of liquid and become a gas |
Boiling | Rapid change from a liquid to a gas, or vapor |
Condensation | The state of change from gas to liquid |
Sublimation | The change from a solid directly to a gas |
Deposition | The change from gas directly to a solid |