Vocabulary Terms

4. the gradual movement of the continents across the earth's surface through geological time
5. something having many related parts that function together as a whole
6. the ground that is at the bottom of the sea
11. a German climatologist, geologist, geophysicist, meteorologist, and polar researcher
12. invisible or indistinguishable without the use of a microscope
14. a laminated usually mounded sedimentary fossil formed from layers of cyanobacteria, calcium carbonate, and trapped sediment

1. cells that have specific structures and functions in the body
2. a division of microorganisms that are related to the bacteria but are capable of photosynthesis. They are prokaryotic and represent the earliest known form of life on the earth
3. he hypothetical landmass that existed when all continents were joined, from about 300 to 200 million years ago
7. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
8. a chain of underwater mountains formed by seafloor spreading at divergent plate boundaries
9. the general weather over a long period
10. gas that is found in small quantities in the atmosphere
13. the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock