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Chapters 2&3: Matter
| Question | Answer |
|---|---|
| Physical changes do not change | a substance's identity. |
| Chemical Change | a change that occurs when one or more substances change into entirely new substances with different properties. |
| Mixtures can be seperated by | physical changes. |
| Compounds must be broken down by | chemical changes. |
| Examples of Physical Changes: | cutting, crushing, reshaping, changing state, dissolving |
| Examples of Chemical Changes: | burning, rusting, digesting, decomposing |
| Atom | the smallest unit of an element that maintains the chemical properties of that element |
| Boiling Point | the temperature and pressure at which a liquid becomes a gas |
| Chemical Change | a change that occurs when one or more substances change into an entirely new substance with different properties |
| Compound | a substance made up of 2 or more atoms of 2 ore more differnt elements joined by compound bonds |
| Element | a substance that cannot be seperated or broken down into small substances |
| Molecule | a group of atoms that are held together by chemical forces |
| Pure Substance | a sample of matter, either a single elemet or a combo, that has definite mass and takes up space |
| Reactivity | the capacity of a substance to combine chemically with another substance |
| The identity of a substance does not change during a change of _____, but the ______ of a substance does change. | state, energy |
| Changes of state that require energy: | melting, evaporation, and sublimation |
| Changes of state that release energy: | freezing and condensation |
| Mass and energy are both | conserved |
| The Law of Coservation of Mass/Energy: | In chemical and physical changes, the total MASS or ENERGY of the substance undergoing the change stays the same BEFORE AND AFTER the change |
| Kinetic Theory of Matter: | Matter is made up of atoms and molecules. |
| Particles are always in | motion |
| The higher the temperature of the substance is, | the faster it moves. |
| More massive particles | move slower than less massive ones. |
| You can classify matter as | a solid, liquid, or gas |
| You can classify matter by determining if | the shape and volume are definite or variable. |
| The most common state of matter | Plasma |
| All particles have kinetic energy because they have | motion. |
| Tmperature is a measure of average | kinetic energy. |
| Thermal energy depends on ______ and ______ of partcles. | speed, number |
| Amorphous Solids: | Rubber bands are a solid, BUT DON'T HAVE A DEFINITE SHAPE. |
| Every sample of matter is either an | element, compound, or mixture. |
| Heterogeneous Mixture: | Substances aren't mixed uniformly and are not evenly distributely. |
| Homogeneous Mixture: | Substances are evenly distributed, and the mixture if the same throughout. |
| Miscible: | Substances that CAN BE mixed. |
| Gases can/cannot mix with liquids. | CAN |
| Salt | Compound |
| Gold | Element |
| Glucose | Compound |
| Water | Compound |
Created by:
erinbelcher96
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