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Sloane Chemistry
All terms for your chemistry unit
| Question | Answer |
|---|---|
| Matter | Anything that has mass and takes up space (volume) |
| Atoms | Building blocks of matter |
| Examples of matter | table, air, door, water |
| NOT matter | heat, light, sound |
| 3 states of matter | solid, liquid, gas |
| Gas | -atoms move very fast and spread out in all directions, takes the shape of a container, least dense, found at warmer temperatures |
| Solid | -definite shape and volume, most dense, found at colder temperatures |
| Liquid | -atoms flow over one another and stay near to each other, definite/fixed volume, takes the shape of the container it is in |
| States of matter from most dense to least dense | solid - liquid - gas |
| Define definite / fixed volume | matter stays the same size, takes up the same space no matter what container you put it in |
| What is needed to change the state of matter? | a change in temperature |
| The change of a liquid to a solid | freezing |
| The change of a solid to a gas | sublimation |
| The change of a gas to a liquid | condensation |
| The change of a liquid to a gas | evaporation |
| The change of a solid to a liquid | melting |
| The change of gas to solid | deposition |
| Which phase changes require heat to be absorbed (warmed up)? | sublimation, melting, evaporation |
| Which phase changes require heat to be removed (cooled down)? | freezing, condensation, deposition |
| During which phase change do atoms move slower and closer together? | freezing, condensation, deposition |
| During which phase change do atoms move faster and farther apart? | sublimation, melting, evaporation |
| Describe a physical change. | no change in matter or composition, same matter as was there at the start, only appearance changes |
| Describe a chemical change. | matter or composition change into something new, hard or impossible to reverse, has ability to react |
| Examples of physical change | bending, breaking, dissolving, melting |
| Examples chemical change/properties | reactivity, flammable, oxidation, rustable, combustible |
| What is a chemical reaction? | chemical change, atoms rearrange themselves |
| When two atoms collide, they ______ with one another | react |
| Define Reactants | A starting matter in a chemical reaction (what you mix together) |
| Define Products | matter produced or created by a chemical reaction. |
| What are indicators of a chemical reaction? | gas formed(bubbles), color change, solid formed (precipitate), temperature change |
| What is a precipitate? | A solid that forms from two liquids during a chemical reaction. |
| What does Exothermic mean? | Releases heat, increases temperature |
| What does Endothermic mean? | Absorbs heat, decreases temperature |
| How can you increase a reactions speed? | increase temperature, stir/mix, crush it up, increase amount or concentration |
| What does "conservation of matter" mean? | matter cannot be created or destroyed (always stays the same) |
Created by:
lgaeta
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