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 |