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10 Cards in this Set

  • Front
  • Back
to make pure or clean
purify
an area of land around a river from which water drains into the river
basin
the force produced by pressing on something
pressure
drawing of a place
map
to mix things up
scramble
place where ships dock
harbor
instrument used to see the stars and planets
telescope
a stem of a plant
stalk
liquid or solid waste that is carried away in sewers and in drains
sewage
a holding area for a large amount of water
reservoir