During the devonian period, animals that could live on land began to evolve. these animals still spent part of their lives in the water. what were these animals called?

reptiles
dinosaurs
amphibians
trilobites

Explore the ways that boundaries influence identity, interaction and exchange. things to consider: what is the race/ethnicity. how easy is it to interact/trade with others.

Which layer surrounds the center of the earth? a: crust b: core c: mantle

If we review the changes in the landscape surrounding the great salt lake in utah we can see a change in topography. look at the area to the south of the lake. what change has occurred during the last twenty-nine years? a) erosion of the hills b) an increase in marshland c) flooding of the area and the development of wetlands d) deposition of sediments and an increase in elevation