Work through the tutorial and respond to the following:
In addition to their shapes, what other data support the hypothesis that Africa and South America were once joined together? [Step 2]
Along the profile line, where is the ocean generally the deepest? ...the shallowest? [Step 3]
What areas of the Atlantic seafloor have the youngest rocks? ...the oldest? [Step 4]
How old are the very oldest rocks on the Atlantic seafloor? Where are they? [Step 4]
Based on the age of the oldest rocks between South America and Africa, when did the two continents split? [Step 4]
Based on ages of the oldest rocks in the North and South Atlantic, describe how and when the Atlantic Ocean formed, and how its shape has changed through time. [Step 4]
Measure the distance between South America and Africa. [Step 5]
Calculate the average yearly widening of the Atlantic Ocean in cm per year. Show your work. [Step 4]
Where else on Earth do mid-ocean ridges exist? [Step 6]
What can you infer about continents on opposite sides of the same mid-ocean ridge? [Step 6]
What evidence would you look for if you wanted to show that two landmasses were once connected? [Step 6]
Extra. With any remaining time, please explore the following:
