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Chemistry test 1
Chapter 1 and 2 chemistry test
| Question | Answer |
|---|---|
| Chemistry | The composition of matter and the changes matter undergoes. |
| Matter | Anything that takes up space and has mass. |
| Volume | The space and object occupies. |
| Qualitative | Observation made without measuring. |
| Quantitative | Observation made with measuring. |
| Law | Explains what happens. |
| Theory | Explains why things happen, well tested, but may change with new technology or future experiments. |
| Property | Used to describe matter; how it appears, behaves, changes or reacts. |
| States of matter | Gas, liquid,and solid. |
| Volatile | A substance that easily changes from a liquid to a gas at room temperature; gasoline. |
| Density | The amount of matter contained in a given volume. |
| Physical changes include | Hardness, color, conductivity, melting point, and boiling point, magnetic, state, density. |
| Examples of physical changes are these | Boil, freeze, melt, condense, break, cut, and crush. |
| Chemical change | A change in the identity of a substance. The change of one or more substances into new substances. |
| Chemical properties | Burn, rot, rust, decompose, explode, corrode. |
| A chemical reaction has happened if you see | A gas,a precipitate,color change, a temperature, or a change in the surface of the substance. |
| Reactant | The substance present at the start. |
| Product | The substance produced. |
| Substance | Pure matter that contains the same composition and properties. |
| Mixture | A substance consisting of two or more substances mixed together without any chemical bonding between them. |
| Heterogeneous | Composed of unrelated or differing parts or elements. |
| Homogeneous | Composed of parts or elements that are all of the same kind. |
| Solute | Substance that is dissolved. |
| Solvent | The substance that does the dissolving. |
| Alloy | A solid solution of different metal substances. |
| Element | A pure substance that cannot be broken down into simpler substances; one type of atom. |
| Compound | Pure substance made up of two or more elements together in fixed proportions. |
| Law of conservation of mass | In a chemical reaction, matter is neither created nor destroyed. |
| Exothermic | Reaction in which energy is given off (fire; tear down). |
| Endothermic | Reaction in which energy is absorbed (photosynthesis). |
| Atom | The smallest quantity of an element that can take part in chemical reaction, individual particles. |
| Molecule | Two or more atoms bonded together. |
| Compound | One type of molecule with two or more different atoms. |
| Solid | Matter with a definite shape and volume. |
Created by:
sheeba1cindy
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