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Biology Mid Term Review
Biology
63
Biology
10th Grade
01/16/2007

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Cards

Term
Scienitific Method
Definition
1. Identify Problem
2. Devolop Hypothesis
3. Design the Experiment
4. Test the Hypothesis
5. Form Conclusions
Term
Hypothesis
Definition
possible explanation for a set of observations or possible answer to a scientific question
Term
Independant Variable
Definition
Variable that is being tested
Term
Dependant Variable
Definition
The outcome of an experiment
Term
Theory
Definition
well-tested explanation that unifies a broad range of observations
Term
Control
Definition
Part of the experiment that is kept the same
Term
Solutions
Definition
mixture of two or more substances in which the molecules of the substances are evenly distributed
Term
Solute
Definition
substance that is dissolved in a solvent to make a solution
Term
Solvent
Definition
substance in which a solute is dissolved to form a solution
Term
Atoms
Definition
basic unit of matter
Term
Protons
Definition
Atom with a positive charge
Term
Electron
Definition
atom with a negative charge
Term
Elements
Definition
substance consisting entirely of one type of atom
Term
Ions
Definition
Atoms with a charge
Term
Acids
Definition
a substance with a pH oh 1-6
Term
Bases
Definition
Substance with a pH of 8-14
Term
pH
Definition
measurement used to indicate the concentration of(H+) in solution
Term
Carbohydrate
Definition
compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body
Term
Lipids
Definition
macromolecule made mainly from carbon and hydrogen atoms; includes fats, oils, and waxes
Term
Nucleic Acids
Definition
macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus that stores heridtary and genetic information (DNA & RNA)
Term
Enzymes
Definition
Protein that controls all chemical reactions
Term
Lock and Key
Definition
The enzyme and the chemical reaction is like a lock and key. Where together they work together but switch the key and the lock wont open
Term
Abiotic
Definition
nonliving
Term
biotic
Definition
living
Term
Habitat
Definition
The place occupied by an organism, population, or community.
Term
Niches
Definition
The function or position of an organism or population within an ecological community.
Term
Competition
Definition
A demand by two or more organisms for limited enviormental resources
Term
Symbiosis
Definition
relationship in which two species live closely together
Term
Mutualisms
Definition
symbiotic relationship in which both species benefit from the relationship
Term
Predation
Definition
One organism captures and feeds on another organism
Term
Ecology
Definition
scientific study of interactions among organisms and between organisms and their environment
Term
Ecosystem
Definition
collection of all the organisms that live in a particular place, together with their nonliving environment
Term
Community
Definition
different populations that live together in a defined area
Term
Population
Definition
group of individuals of the same species that live in the same area
Term
Producers
Definition
living thing that can capture its energy from the sun or chemicals to use as food


a.k.a. autotroph
Term
Consumers
Definition
organisms that rely on other organisms for food
Term
Decomposers
Definition
organism that breaks down and obtains energy from dead organic matter
Term
Hetertrophs
Definition
consumers (rely on other organisms for food)
Term
Autotrophs
Definition
producer (organism that uses sun for energy)
Term
Carnivores
Definition
organism that obtains energy by eating animals
Term
Herbivores
Definition
organism that obtains energy by eating only plants
Term
Endangered Species
Definition
species that has a limited population due to certain reasons (ex.weather, human interaction...)
Term
Food Chain
Definition
series of steps in an ecosystem in which organisms transfer energy by eating and being eaten
Term
Food Web
Definition
network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem
Term
Trophic levels
Definition
step in a food chain or food web
Term
Population Growth Rate
Definition
1. # of births
2. # of deaths
3. Immigration and Emigration
Term
Emigration
Definition
movement of individuals OUT of a population
Term
Immigration
Definition
movement of individuals into an area occupied by an existing population
Term
Population Denisity
Definition
number of individuals per unit of area
Term
Carring Capacity
Definition
largest number of individuals of a population that a given environment can support
Term
Population
Definition
the amount of organisms in a designated area
Term
Density Dependant
Definition
limiting factor that depends on population size
Term
Density Independant
Definition
limiting factor that affects all populations in similar ways, regardless of population size
Term
Biodiversity
Definition
biological diversity; the sum total of the variety of organisms in the biosphere
Term
Endangered Species
Definition
species whose population size is rapidly declining and will become extinct if the trend continues
Term
Invasive Speices
Definition
plants and animals that have migrated to places where they are not native
Term
cell
Definition
collection of living matter enclosed by a barrier that separates the cell from its surroundings; basic unit of all forms of life
Term
Cell Theory
Definition
idea that all living things are composed of cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells
Term
Virus
Definition
particle made up of nucleic acid, protein, and in some cases lipids that can replicate only by infecting living cells
Term
Prokarote
Definition
single-celled microorganism that lacks a nucleus
Term
Eukaroyte
Definition
organism whose cells contain nuclei
Term
Organic Compounds
Definition
a material that contains carbon and hydrogen and usually other elements such as nitrogen, sulfur and oxygen.
Term
Law
Definition
a theory that has been proven true by many experiments by many scientists
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