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18 Cards in this Set

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  • Back
marsh
low, wet land where cattails, tall grasses, and other similar plants grow
fall line
a place where a reiver drops from higher to lower land
waterpower
energy produced by rushing water
pioneer
a person who first settles in a new place
pass
an opening between high mountains
line graph
a graph that uses a line to show changes over time
reservoir
a lake formed by the water held back by a dam and used to store water
hydroelectric power
electric made by water power
reclaim
to return something, such as land, to its natural condition
hub
city where trains or planes stop on there way to other places
occupation
the work that a person does for a living
high-tech
having to do with inventing, building, or using computers and other kinds of electric equipment
wildlife refuge
an area of land set aside to protect animals and other living things
habitat
a region where a plant or animal naturally grows or lives
endangered
being threatened with extinction
extinct
no longer in existence, which is what happens to a living thing when all of its kind have died out
reef
a ridge of rocks, sand, or coral near the surface of the sea
coral
a stony material formed in tropical waters by the skeletons of tiny sea animals