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2015 Semester 1 Vocab
All vocab from first semester Life Science
32
Biology
10th Grade
01/02/2014

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Term
activation energy
Definition
energy needed to get a reaction started
Term
adhesion
Definition
attraction between different kinds of molecules
Term
catalyst
Definition
any substance that speeds a chemical reaction
Term
carbohydrate
Definition
Major source of energy for the body, made up of C, H, and O.
Term
cohesion
Definition
attraction between molecules of the same substance
Term
community
Definition
groups of different species living in the same area
Term
autotroph
Definition
can make their own food
Term
denitrification
Definition
process by which bacteria change nitrates back to nitrogen gas
Term
monomer
Definition
small chemical unit that makes up a polymer
Term
nucleotide
Definition
monomer of DNA; 5-carbon sugar, phosphate group, and base
Term
Limiting Nutrient
Definition
essential nutrient that limits productivity in ecosystem
Term
Nitrogen fixation
Definition
process by which bacteria change nitrogen gas into usable Nitrates
Term
Nutrient
Definition
chemical substance that organisms need to survive
Term
Pioneer species
Definition
first species to populate an area to start succession
Term
Independent variable
Definition
factor in an experiment that is changed by the scientist
Term
Niche
Definition
Habitat organism lives in and the job it performs in that habitat
Term
heterotroph
Definition
obtains energy by feeding on other organisms
Term
detritivore
Definition
feeds on dead organisms
Term
ecology
Definition
study of interactions of organisms and their environment
Term
Keystone Species
Definition
Species that exerts strong control on structure of a community
Term
Hypothesis
Definition
possible explanation for a set of observations, possible answer to scientific question
Term
Inference
Definition
interpretation based on prior knowledge
Term
Dependent variable
Definition
factor that changes in response to the independent variable,
Term
enzyme
Definition
proteins that speed reactions in living things
Term
polymer
Definition
molecule composed of many monomers; makes up macromolecules
Term
species
Definition
organisms that breed and produce fertile offspring
Term
substrate
Definition
Substance that an enzyme reacts with
Term
solute
Definition
substance that is dissolved in a solution
Term
solvent
Definition
dissolving substance in a solution
Term
population
Definition
group of same species living in the same area
Term
primary succession
Definition
succession that occurs after a major disaster leaving bare rock
Term
secondary succession
Definition
succession that occurs after minor disturbance where soil
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