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Biology
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Biology
9th Grade
01/27/2008

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Term
Particle of matter
Definition
theory that says that all things are made ou of tiny specks such as atoms or molecules
Term
atom
Definition
the smallest particl of an element that still retains its properties the building block of all matter
Term

subscript

Definition
the small number in a chemical formula that tells how many atoms of the previous element are in the molecule
Term
molecule
Definition
particles made out of two or more atoms the smallest particles of compounds that still retain their properties
Term

element

Definition
the aproximently 100 most basic substances. Substances made out of a single kind of atom
Term
coefficient
Definition
the large numbers in a chemical equation that tell how many molecules are in the reaction
Term
electron
Definition
negetively charged particle inside all atoms outside of the atomic nucleous
Term
compound
Definition
substances made out of two or more kinds of elemens chemically combined
Term
proton
Definition
positively charged particle in the atomic nucleous
Term
chemical bond
Definition
force holding atoms together inside of compounds
Term
interphase
Definition
the part of the cell cycle whn the cell grows and make dna
Term
metaphase
Definition
second phase of mitosis; when the cells chromosomes line up on the equator
Term
cytoplasm
Definition
the region of the cell inside the cell membrane
Term
endoplasmic reticulum
Definition

system of membranes that helps im the production and transport of protiens inside the cell

Term
ribosomes
Definition
cell organelle where protien synthesis occurs
Term
prophase
Definition
first phase of miosis; chromosomes condense, nuclear membranes disslove, and splinde fibers form
Term
anaphase
Definition
third phase of mitosis; splindle fibers pull apart the chromatids
Term
telephase
Definition
final phase of mitosis; nuclear membrane reforms and cytokenesis begins
Term
cytokenisis
Definition
division of cytoplasm between two cells
Term
passive transport
Definition
movement of pparticles through a cell membrane that does not require added energy
Term
feedback loop
Definition
a process in which information, energy or matter passes from substance to substance and enventually returns to affect original substance 
Term
chemical reaction
Definition
the rearanging of of atoms into new molecules, frequentl giving off or requiring energy
Term
transport protiens
Definition
protiens in a cell membrane that aid in active ftranport or facilitate diffusion
Term
combination of chemical symbols and subscripts that describe the make up of molecules 
Definition
chemical formula
Term
gamete
Definition
haploid sex cell
Term
meosis
Definition
nuclear division that provides 4 haploid daughter cells
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