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6th Science Ch 3 *1
6th grade science - chapter 3 test - vocab
| Question | Answer |
|---|---|
| State of Matter | The physical form in which a substance can exist |
| Solid | The state of matter in which the volume and shape of a substance are fixed |
| Liquid | The state of matter that has a definite volume but not definite shape |
| Gas | A form of matter that does not have a definite volume or shape |
| Atom | Smallest unit of an element that maintains the properties of that element |
| Surface Tension | A force that acts on the particles at the surface of a liquid and tends to minimize the surface |
| Viscosity | The resistance of a gas or liquid to flow |
| Temperature | A measure of how hot (or cold) something is; specifically, a measure of the movement of particles |
| Volume | The amount of space that an object takes up (the measure of the size of a body or region in three-dimensional space) |
| Pressure | The amount of force exerted per unit area of a surface |
| Boyle's Law | For a fixed amount of gas at a constant temperature the volume of the gas is inversely related to pressure (ex: gas increases, volume decreases by the same amount) |
| Charles's Law | For a fixed amount of gas at a constant pressure, the volume of the gas changes in the same way that the temperature of the gas changes (ex; temperature increase and volume of gas increase by the same amount) |
| A Change in State | The change of a substance from one physical form to another. Identity of the substance doesn't change. |
| Melting | The change of state from a solid to a liquid by adding energy |
| Endothermic | Energy is added (gained) to the substance as it changes state |
| Freezing | The change of state from a liquid to a solid |
| Exothermic | Energy is removed from the substance as it changes state |
| Evaporation | The change of a substance from a liquid to a gas |
| Boiling | The change of state from a liquid to a vapor or gas (when the vapor pressure of the liquid equals the atmospheric pressure) |
| Condensation | The change of state from a gas to a liquid |
| Sublimation | The change of state from a solid to a gas (ex: Dry ice changes directly from a solid to a gas) |
| Convection | Transfer heat from hot to cold in a cycle (Ex. Boiling Water) |
| Conduction | Transfers heat from the source through material |
| Radiation | Transfer of heat by using waves |
| Melting Point | The temperature at which a substance changes from a solid to a liquid. |