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29 Cards in this Set

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multicellular
description of an organism consisting of many cells, some of which are typically specialized for particular functions.
unicellular
description of an organism consisting of only a single cell
celcius scale
scale of temperature where water freezes at 0 and boils and 100.
cubic centimeters
basic metric unit of volume for solids; equal to a milliliter
mass
measure of the amount of matter in an object
weight
measure of the pull of gravity on a mass
kilogram
basic metric unit of mass
scientific method
systematic approach to problem solving that involves observation and experimentation.
data
recorded observations and information
hypothesis
possible explanation or conclusion about some event in nature; proposed solution to a scientific problem
variable
single factor that is isolated and tested in an experiment.
control setup
part of an experiment that does not contain the variable
experimental setup
part of an experiment that contains the variable being tested
theory
time tested concept that makes useful and dependable predictions about the natural world
metric system
universal system of measurement scaled on the multiples of ten
meter
basic metric unit of length
liter
basic metric unit of volume for liquids.
science
process whose goal is to understand the natural world.
sexual reproduction
process in which two cells, normally from different individuals unite to produce the first cell of a new organism.
asexual reproduction
process in which a single organism produces a new organism or organisms idectical to itself.
anabolism
process in a living thing that involves synthesizing complex substances from simpler substances.
catabolism
breakdow of complex sustances into simpler substances
metabolism
sum of all chemical reactions in the vody balance of anabolism and catabolism
metabolism
sum of all chemical reactions in the vody balance of anabolism and catabolism
homeostasis
process by which organisms keep internal conditions constant despite changes in their external environments.
compound light microscope
mivroscope with more than one lens that uses light the magnify objects
limit of resolution
point of magnification in a microscrope beyond which images become blurry and lose detail.
transmission electron microscope
microscope that uses a beam of electrons to magnify an image onto a fluorescent screen.
scanning electron microscope
mivroscope that uses a beam of electrons to scan the surfave of a specimen and produce a 3D image of the surface by recording the electrons that bounce off.