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Life Science Vocab
N/A
57
Science
7th Grade
01/15/2012

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Term
Scientific Method
Definition
Series of procedures to solve problems
Term
Hypothesis
Definition
An explanation that can be tested
Term
Control
Definition
standard to which the outcome of a test is compared
Term
variable
Definition
something in an experiment that can change
Term
Theory
Definition
an explanation of things or events based on scientific knowledge
Term
Fact
Definition
something that is true
Term
Organism 
Definition
any living thing
Term
Cell
Definition
smallest unit of an organism that carries on the functions of life
Term
Homeostasis
Definition
proper conditions on the inside no matter what is going on on the outside
Term
Spontaneous Generation
Definition
Living things coming from nonliving things
Term
Biogenesis
Definition
Living things coming only from living things
Term
Phylogeny
Definition
Evolutionary story of an organism
Term
Kingdom
Definition
First and largest category
Term
Binomial Nomenclature
Definition
two word naming system
Term
Genus
Definition
group of similar species
Term
Tissue
Definition
group of similar cells working together
Term
organ
Definition
Group of similar tissues working together
Term
Organ System
Definition
Group of organs working together
Term
Unicellular
Definition
One cell
Term
Multicellular
Definition
More than one cell
Term
Cell Membrane
Definition
Outer covering of a cell
Term
Organelles
Definition
stuctures in eukaryotic cells
Term
Cytoplasm
Definition
gel like substance in the cell
Term
nucleus
Definition
Directs all cell activities
Term
Prokaryotic
Definition
Cell with out a nucleus or membrane bound structures
Term
Eukaryotic
Definition
Cell with a nucleus and membrane bound structures
Term
Bacteria
Definition
...are prokaryotic
Term
Cell Wall
Definition
tough outer covering
Term
Ribosome
Definition
Protein making organelle
Term
Endoplasmic Reticulum
Definition
extends from nucleus to cell membrane. a series of folded membranes that can process and move materials
Term
Mitochondria
Definition
releases energy
Term
Chloroplasts
Definition
food is made. in plant cells
Term
Golgi body
Definition
sort and package proteins
Term
Vesicle
Definition
storage
Term
Vacuole
Definition
temporary storage
Term
Lysosome
Definition
enzyme that breaks down things
Term
Virus
Definition
Strand of hereditary material surrounded by protein
Term
Mixture
Definition
combination of substances where the individual substances retain their own properties
Term
Organic Compound
Definition
always contains carbon and hydrogen
Term
Enzyme
Definition
regulate nearly all chemical reactions in a cell
Term
Inorganic Compound
Definition
made of elemens other than carbon
Term
Diffusion
Definition
movement of molecules from an area with relatively more moluecules to another area with relatively fewer molecules
Term
Osmosis
Definition
diffusion of water
Term
Passive transport
Definition
movement of substances without energy
Term
active trasnport 
Definition
movemtn of substances with energy
Term
Endocytosis
Definition
Taking a substance in by surrounding it with the cell membrane
Term
Exocytosis
Definition
vesicle fuses with cell mebrane then breaks out of it
Term
equillibrium
Definition
when diffusion stops
Term
Metabolism
Definition
all chemical reactions
Term
photosynthesis
Definition
plant cells using light energy to make sugars
Term
Cellular Respiration
Definition
when chemical reactions occur
Term
fermentation
Definition
releasing energy  in glucose molecules when not enough oxygen is available
Term
Asexual reproduction
Definition
new oranism is produced from one organism
Term
mitosis
Definition
nucleus divides into two identical nuclei
Term
chromosome
Definition
structure in nucleus that contains hereditary material
Term
chromatid
Definition
thickened identical strands
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