List four things that might cause a species to be vulnerable to extinction:

Which is a possible result of higher air temperatures caused by global warming? a. increase in sea level b. freezing of polar ice caps c. rapid evaporation of water in the soil d. flooding of low-lying coastal areas

What forms of energy are involved when snow on a mountain breaks loose, resulting in an avalanche? during an avalanche, the( 1 ) energy of the snow on the mountain is converted into ( 2 ) energy as the snow cascades down. ( 1 ) a. elastic b. kinetic c. potential d. radiant ( 2 ) a. chemical b. kinetic c. nuclear d. potential

Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.