large, destructive waves caused by earthquakes

large frozen formations of ice

the height of waves

a manmade or natural barrier which prevents flooding

movement of the ocean’s surfaces

rock formations hanging down from the top of a cave

images of the earth’s surface

processes where the earth’s surface decreases

the plants which grow in an area

rock formations which form on the bottom of caves

an invasive species of rodent which damaged Louisiana’s marshes

a natural process of forming rock and crystal in caves

islands which protect coastlines from flooding and erosion