Do Now Alt Energy Sources 1. _____heat from inside the Earth 2. _____type of resource minerals and metals are 3. _____cutting down all of the trees in an area 4._____crops that replenish the nutrients in the soil 5. ___what does the anchoring of plant roots prevent

1. What layer of soil is made of clay and minerals and contains less humus? (soil profile) 2. What principle states all geologic change occurs suddenly? (Earth’s Story) 3. What is the law that says younger rock layers lie over older rock layers? (Earth’ Story) 4. What is the most important source of information used to trace the evidence of life? (fossil lab) 5. What type of rock are fossils formed in ? (fossils) Do Now

1. What was Alfred Wegner’s theory? 2. What is continental drift? 3. What evidence supports continental drift? 4. Why was Alfred Wegener’s theory not accepted? 5. What is Pangaea?

Alfred Wegener The theory of plate tectonics was pioneered by Alfred Wegener in the early 20th C. Died 1930 returning from rescue mission in Greenland.

1. Alfred Wegner’s theory was continental drift. 2. Continental drift is the theory that continents drift apart from one another and have done so in the past. 3. The evidence that supports continental drift is the continents fit together like the pieces of a puzzle, fossil record, and glacial grooves 4. Wegener’s theory was not accepted because he could not prove how the continents moved 5. Pangaea is the supercontinent where all continents were one landmass

Continental Drift: Pangaea Observe an animation of the breakup of Pangaea. Observe an animation of the breakup of Pangaea.

Evidence for Continental Drift

More Evidence for the Theory of Continental Drift Glacial Grooves

Glaciers Cut Grooves in Rock!