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28 Cards in this Set

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  • Back
organisms
is a living human, insect, anything!
uniceller
only use a single cell and live off it
multicellular
live off of many cells more then 1
development
is change that occurs during a living things life
stimulus
change around life and make then react
response
change in behavior
reproduce
have offspring= babys
that r similer to parents
spontaneous generation
mistaken idea that living and non-living things differ
controlled experiment
scientist have 2 tests same except for 1 factor
variable
changed factor
rocks
made of mixtures of minerals and other materials
igneous rock
forms when molten material cools and hardens below or the earths surface
sedimentary rock
forms when particles of other rocks or the remains of plants and animals are pressed and cemented together.
metamorphic rock
formed when an existing rock is changed by heat, pressure, or chemialcal reactions.
petrified fossils
fossils in whcih mimerals replace all or part of an organisim
mold
is a hallow area in sediment in the shape of an organims or part of an organims.
cast
is a copy of the shape of an organism
carbon film
an extremely thin coating of carbon on rock
trace fossils
provide evidence of the activites of an acient organism
relative age
age that is compared to the ages of ther rocks
absolute age
rock that is the # of yrs since the rock formed
extrusion
lava that hardens on the surface
intrusion
magma cools and hardens into a mass of igneous rock
index fossil
a fossil must be widely distributed and represent a type of the organism that existed only briefly.
unconformity
is a gap in the geologic record.
atoms
allt hematter u c is made up of tiny particles
element
all the atoms r the same its
radioactive decay
the breakdown of a radioactive element, relesing particles and energy.