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science midterm
ugh i want to finish this NOW!
| Question | Answer |
|---|---|
| solid | matter with definite shape and volume molecules are tightly compacted together very little kinetic energy |
| liquid | matter with definite volume but definite shape molecules are spread out more kinetic energy |
| gas | matter with no definite shape or volume molecules are spread out most kinetic energy |
| plasma | most common state in the universe |
| composition | elements combine to form a compound |
| decomposition | compounds break down into elements |
| law of conservation of mass | matter is neither created nor destroyed through any chemical reaction |
| oxidation | a chemical change which oxygen reacts with a substance |
| corrosion | a chemical reaction where oxygen reacts with a metal |
| rapid oxidation | form of oxidation that occurs quickly |
| synfuel | synthetic or man made fuels put together by other substances |
| nuclear reaction | a reaction where the nuclei or nucleus of an atom is changed giving of tremendous amounts of energy |
| radioactive elements | elements whose nucleus naturally break down |
| gamma rays | form of energy that you cannot see or feel but can pass through many materials |
| radiation | harmful particles of gamma rays given off by radio active particles |
| nuclear fission | large nuclei split apart to generate large amounts of energy |
| nuclear reactor | device that controls a nuclear reaction |
| core | controls the fuel |
| control rods | controls speed of reaction |
| liquid | carries away heat |
| sheilding | stops radiation from getting out |
| nuclear power plant | uses heat released in a nuclear reaction in the form of steam to create electricity |
| nuclear fusion | small nuclei come together to form a larger nucleus |
| matter | any thing that takes up space and has mass |
| model | a mental picture or figure |
| proton | a particle with positive charge |
| electron | a particle with negative charge |
| neutron | a particle with neutral charge |
| Bhor model | the planetary model of an atom |
| electron cloud model | model where the electrons move in all directions |
| elements | made of one kind of atom |
| periodic table | a table that contains info about the elements |
| family | a group of elements that have similar characteristics |
| metals | shiny can be shaped good conductors of electricity |
| non metals | not shiny cannot be shaped not good conductors of electricity |
| semi metals | shares properties of metals and non metals |
| noble gases | don't combine easily with other elements |
| energy level | the number of electrons in each level of an element |
| compound | substances formed when two or more elements combine chemically |
| chemical bonds | forces that hold atoms together in a compound |
| ion | atoms that have lost or gained an electron |
| molecule | particle formed by share of electrons |
| formula | a group of symbols that represent elements in a compound |
| chemical symbols | a letter that stands for a name of a element |
| organic compounds | compounds that contain carbon |
| organisms | any living thing |
| hydrocarbon | a compound made of ONLY hydrogen and carbon |
| polymer | an organic compound made of a chain of carbon atoms |
| monomer | part of a polymer |
| indicator | a dye that changes color when mixed with an acid or base |
| acid | turns blue litmus red and has a pH of 0-6 |
| base | turns blue litmus to red and has a pH of 8-14 |
| strong acids | pH of 1-3 |
| weak acids | pH of 4-6 |
| strong base | pH of 11-14 |
| weak base | pH of 8-10 |
| salts | formed when a acid is mixed with a base |
| neutralization | when a acid mixes with a base and forms salt or water |
Created by:
mestarpop
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