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idk
idk
31
Science
8th Grade
04/21/2009

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Term
matter
Definition
is anything
Term
toxic
Definition
poisenness
Term
density
Definition
the state or quality of being dense; compactness; closely set or crowded condition.
Term
fossil fuel
Definition
A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel.
Term
hydroeltric power
Definition
a form of energy generated by the conversion of free-falling water to electricity; the generation of electricity by using the motive power of water; also called hydroelectricity
Term
convention
Definition
a meeting or formal assembly, as of representatives or delegates, for discussion of and action on particular matters of common concern.
Term
machine
Definition
an apparatus consisting of interrelated parts with separate functions, used in the performance of some kind of work
Term
ribsomes
Definition
creates the protein for the cell
Term
waves
Definition
a disturbance on the surface of a liquid body, as the sea or a lake, in the form of a moving ridge or swell.
Term
decibel
Definition
a unit used to express the intensity of a sound wave, equal to 20 times the common logarithm of the ratio of the pressure produced by the sound wave to a reference pressure, usually 0.0002 microbar.
Term
refraction
Definition
the change of direction of a ray of light, sound, heat, or the like, in passing obliquely from one medium into another in which its wave velocity is different.
Term
reflection
Definition
the act of reflecting or the state of being reflected.
Term
consumer
Definition
an organsm that consumes its energy fronm feeding on other oraganisms
Term
preadator
Definition
an organsm that does the killing
Term
prey
Definition
an organsm that is killed from another organsm
Term
scavanger
Definition
feeds on body of dead organsm
Term
producer
Definition
an organsm that makes its own food
Term
decomposer
Definition
organsms that breaks down dead organsm
Term
herbivore
Definition
a consumer that eats only plants
Term
omnivore
Definition
eats both meat and plants
Term
food chain
Definition
series of events were organsm are eaten
Term
food web
Definition
overlaping food chains
Term
ribosomes
Definition
a small organelle that creates prtein for the cell
Term
endoplasmic reticulluim
Definition
a cell structure in which protein and other materials travel through the cell
Term
lysome
Definition
is a small round cell structure containing large food particles that break down small food particles
Term
chloroplast
Definition
a structure in the cells of plants and some organsms thar captures the sunlight and converts into energy
Term
mitochondria
Definition
creates the energy for the cell
Term
photothesis
Definition
a process which some organsms uses water and sunlight and water to maek their food
Term
respiration
Definition
a process cells used to break down simple food to release their energy
Term
increase
Definition
to make greater
Term
decrease
Definition
to lessen
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