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43 Cards in this Set

  • Front
  • Back
force
produces movement or acceleration, push or pull
element
a substance that cannot be reduced to a more simple substance
deposition
layering matter in a natural process
ecosystem
animals and plants living together in a certain environment
earthquake
the shaking of the Earth
energy
a source of usable power
igneous rock
a rock formed from molten
energy pyramid
a diagram that shows how much energy is available to various levels in the feeding order
inclined plane
a simple machine that is a slanted surface
friction
a force that opposes the motion of an object
herbivore
an animal that feeds on plants
investigation
part of an experiment but not a complete experiment
density
how many animals live in one area or how much substance is in one container
experiment
a procedure carried out and repeated to answer a hypothesis
heat
a form of energy that changes temperature
habitat
a place in an ecosystem where an organims lives
constellation
a star pattern in the sky
chemical change
a reaction in a substance by a chemical that creates a new chemical
consumer
an organsim that feeds on other organisms
condensation
the process of changing from a gas to a liquid (like on the side of a cold drink)
evaporation
the process that liquid is converted to a gas
inertia
the amount of resistance an object has on a force (the heavier an object, the more inertia it has, the harder it is to move the object
fulcrum
the pivot point of a lever
gas
one state of matter
compound
a substance that can not be separated easily
atom
the smallest unit of a chemical element
adaptation
a characteristic of an organism that increases its chance of survival
environment
plants and animals living together
gravitation
a force of attraction between two objects
decomposer
any organism that breaks down dead organisms
change of state
matter changes from liquid to gas or solid (water can be liquid, solid, or gas)
atmosphere
the layers of gas that surround Earth, other planets, or stars
fossil
part of a plant or animal that is preserved in rock
galaxy
large collection of stars and planets
community
all different poplulations living together in an ecosystem
gravity
how gravitation affects an object
conservation
to control and protect an environment
food chain
transfer of energy through various stages in feeding patterns of organisms
equator
an imaginary circle around the Earth's surface
food web
the food cycle
erosion
a wearing away of the Earth's surface by the breakdown of soil and rock
axis
the imaginary line on which an object rotates (the Earth rotates on its axis)
carnivore
an animal or plant that eats other animals