Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Wed. Science Test
Wednesday science test
| Question | Answer |
|---|---|
| definite volume, no definite shape | liquid |
| no definite volume or shape Ex: oxygen or steam | gases |
| gas with its electrons stripped off Ex: Northern Lights, neon signs, the sun | Plasma |
| a reaction that needs energy to happen, that "sucks energy IN". This can be cold | endothermic |
| a reaction that needs to get rid of energy, that lets "energy EXit". This can be warm | exothermic |
| signs of chemical change are? | change in color, change in odor, change in consistency, change in temperature, production of gas, production of precipitate |
| definite volume and shape Ex: ice or wood | solid |
| atoms occupying the same quantum state | Bose-Einstein Condenstate |
| plasma> gas | recombination |
| gas>liquid | condensation |
| liquid>solid | freezing |
| gas>solid | sublimation |
| gas>plasma | ionization |
| liquid>gas | evaporation or boiling |
| solid>liquid | melting |
| mass | amount of material in an object-- not the weight; measured in grams |
| volume | amount of space an object takes up; measured in liters |
| physical change | a change that alters the form or appearance but doesn't make the substance into another substance |
| examples of physical change? | phase, shape, form; melting, freezing, boiling cutting, smooshing |
| chemical change | a change that produces new substances with new properties different from the original substances |
| examples of chemical change? | combustion, oxidation,tarnishing,electrolysis, acid/base reactions; baking soda w/ vinegar, acid on your skin, crackers broken down by spit enzymes |
| chemistry | the study of matter and how matter changes |
| matter | anything that has mass and volume |
| pure substances | fixed compositions (water) distinct properties (boils at 100 degrees C) |
| mixtures | combination of pure substances in which the pure substances retain their chemical properties (chocolate chip cookies, salt water) can be separated (filtration, distillation, evaporation, magnetism) |
| elements | cannot be broken down into simpler substance and still retain its properties; single elements (Na,H,Fe) |
| compounds | two or more elements chemically combined (Salt-- NaCl Water--H2O Rust--Fe2O3) |
| homogeneous mixture aka solution | uniformly mixed throughout (saltwater, bronze, sugar, cookie, a fart :D ) |
| heterogeneous | varied composition (chocolate chip cookies, jello with fruit, yourself) |
| atoms | the smallest unit of an element that maintains the properties of that element |
| molecules | composed of two or more elements that are joined by chemical bonds the same elements:H2, O2, N2 different elements:C6H12O6, H2O |
| compounds | pure substance composed of two or more different elements joined by a chemical bonds |
Created by:
LittleRiver
Popular Science sets