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Science exam
Vocab words
44
Science
7th Grade
12/09/2010

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Term
List the steps of the scientific method
Definition
ask a question,make an observation, make a hypothesis, test the hypothesis, anylize rusults, draw conclusion, communicate results
Term
controlled expirement
Definition
test only one factor at a time and cosists of a group and one or more expiremental groups.
Term
variable
Definition
a factor that changes in an expirement in order to test a hypothesis
Term
coceptual model
Definition
represent system of ideas
Term
mathematical model
Definition
made up of numbers, equations, or other forms of data
Term
scientific law
Definition
the one kind of scientific idea that rarely changes
Term
compound light
Definition
a type of microscope that magnifies a small object
Term
transmission electron
Definition
type of microscope that electrons producde a flat image
Term
cell
Definition
a_is a membrane-covered structure that contains all of the materials necessary for life
Term
metobolism
Definition
the sum of all chemical processes that occur in an organism
Term
DNA
Definition
the cells of all living things contain the molecule
Term
anarobic
Definition
organisms that can live without air
Term
consumer
Definition
an organism that eats other oganisms
Term
ATP
Definition
the major energy-carrying molecule in the cell
Term
Robert hooke
Definition
first person to describe cells
Term
Anton van
Definition
saw oranisms under a microscope called animecules
Term
theodor schwann
Definition
concluded all animals tissues made of cells
Term
Gregor mendel
Definition
discovered the principle of heredity
Term
oswald avery
Definition
american genetics
Term
Rosalind franklin
Definition
Used X-ray
Term
ribosomes
Definition
tiny, round orgenelles made of protien and other material
Term
prokaryote
Definition
single celled oranisms that don't have a nucleus
Term
organelles
Definition
structures that perform specific functions within the cell
Term
eukaryote
Definition
organisms made up of cells that have a nucleus
Term
cell wall
Definition
plant cells have an outer most structure
Term
cell membrane
Definition
a protective barrier that encloses the cell
Term
golgi complex
Definition
cell orgenelle that helps make and package meterials to be transported out of the cell
Term
vescicle
Definition
a small sac that surrounds meterial to be movedinto or out of a cell
Term
chloraplast
Definition
orgenelle that uses the energy of sunlight to make food
Term
tissue
Definition
a group of cells that work together to perform specific job
Term
function
Definition
the job the part does
Term
organ
Definition
a collection of tissues that carry out a specialized function
Term
structure
Definition
the arrangement of partys in an organism
Term
diffusion
Definition
the movement of particles from regions of higher density to lower density
Term
 osmosis
Definition
the diffusion of water through a semipermable membrane
Term
mitosis
Definition
the complicated process by which chromsomes condence and seperate
Term
chromosomes
Definition
DNA of a cell organize into structures
Term
pedigree
Definition
used to organize all the possible combinations of offspringfrom particular parents
Term
meiosis
Definition
a process in cell divisionduring which the number of chromosomes decrease to half the original number
Term
punnet square
Definition
a diagram that shows the occurence of the genetic traitin several generations of the family
Term
phenotype
Definition
an organisms appearence or other delectable characters
Term
genotype
Definition
the entire genetic makeup of an organism
Term
neclotide
Definition
consists of sugar
Term
TGAGGAC
Definition
ccccccccccccccccccc
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