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25 Cards in this Set

  • Front
  • Back
organized way of using evidence to learn about the natural world; also, the body of knowledge that scientists have built up after years of using this process
use of one or more of the senses to gather information
evidence; information gathered for observations
logical interpretation based on prior knowledge and experience
possible explanation for a set of observations or possible answer to a scientific question
hypothesis (disproven) stating that life could arise from nonliving matter
spontaneous generation
a test of the effect of a single variable by changing it while keeping all other variables the same
controlled experiment
factor in an experiment that a scientist purposely changes; also known as independent variable.
manipulated vairable
factor in an experiment that a scientist wants to observe, which may change in response to the manipulated variable; also known as the dependent variable
responding variable
well-tested explanation that unifies a broad range of observations
science that seeks to understand the living world
collection of living matter enclosed by a barrier that separates the cell from its surroundings; basic unit of all forms of life
process by which cells from two different parents unite to produce the first cell of a new organism
sexual reproduction
process by which a single parent reproduces by itself
asexual repeoduction
set of chemical reactions through which a organism builds up or breaks down materials as it carries out its life processes
a signal to which an organism responds
process by which organisms maintain a relatively stable internal environment
change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
decimal system of measurement based on certain physical standards and scaled on multiples of 10
metric system
device that produces magnified images of structures that are too small to see with the unaided eye
microscope that allows light to pass through a specimen and uses two lenses to form an image
compound light microscope
microscope that forms an image by focusing beams of electrons onto a specimen
electron microscope
group of cells grown in a nutrient solution from a single original cell
cell structure
technique in which cells are broken into pieces and the different cell parts are separated
cell fractionation