Today in class we learned more about seafloor spreading. We made a model of the ocean floor and learned about how magnetic stripping provides evidence for seafloor spreading.
We also wrote a class summary about seafloor spreading and worked a little on vocabulary.
Continental drift: the hypothesis that the continents slowly move across Earth’s surface
Pangaea: The name of the single landmass that broke apart 200 million years ago and gave rise to today’s continents
Mid Ocean Ridge: an undersea mountain chain where new ocean floor is produced; a divergent plate boundary
Deep Ocean Trench: a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle
Subduction: The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
Seafloor Spreading: The process by which molten material adds new oceanic crust to the ocean floor
Tonight’s homework: Quiz tomorrow on continental drift and seafloor spreading! Complete vocabulary in your notebook and study guide provided. study guide plate 1