Continental Drift Crossword Puzzle

QUESTIONS LIST:

• million : 250 _ : alfred wegener hypothesized that pangaea began to break apart about how many years ago?
• seafloor spreading : the process that creates new sea floor as plates move away from each other at the mid-ocean ridges
• fossils : paleontologists noticed that these were the same on different continents even though the continents were separated by oceans
• lithosphere : a rigid layer made up of the uppermost part of the mantle and the crust.
• increases : what happens to temperature as you go deeper in the earth?
• convection : force in the mantle that causes tectonic plates to move.
• magnetic : the earth's _ field reverses from time to time.
• africa : alfred wegener noticed that the coast of south america seemed to fit into the coast of this continent, just like a jigsaw puzzle.
• subduction zones : places where the seafloor is forced under continental plates.
• plate tectonics : a theory stating that the earth's surface is broken into plates that move.
• two centimeters : about how far do the plates move each year?
• astheno sphere : the zone below the lithosphere. it is more 'plastic' than the lithosphere so it is easier to bend and move.
• alfred wegener : scientist who first proposed the theory that the continents drifted.
• mantle : section of the earth below the crust.
• fossil record : glossopteris and mesosaurus would be considered this type of pangaea supportive evidence.
• mesosaurus : a fossil that was found in both south america and africa; evidence of continental drift.