geographic history
land and ocean
world
these are some parts of the word that are unique
bay
part of a large body of water that is smaller than a gulf
gulf
a large part of the ocean that extends into land
glacier
a large area of slow moving ice
delta
an area where a river deposits soil into the ocean
ocean
a large body of water
coral reef
an ocean ridge made up of skeletal remains of tiny sea animals
mountain
an area of rugged land that generally rises higher than 2000 feet
volcano
an opening in earths crust where lava, ash, and gases erupt