Question

the youngest and thinnest oceanic crust can be found closest to the ridge/rift at a divergent boundary. true false what hypothesis states that the continents were once joined to form a single supercontinent and then broken apart? seafloor spreading plate tectonics continental drift paleomagnetism tectonic plates can only contain either oceanic or continental crust, never both. true false

Explanation:

• For the first question: At divergent boundaries (mid - ocean ridges/rifts), new oceanic crust is formed. As it moves away from the ridge, it cools, thickens, and ages. So the youngest and thinnest oceanic crust is closest to the ridge/rift.
• For the second question: The Continental Drift hypothesis proposed by Alfred Wegener states that continents were once part of a single supercontinent (Pangaea) and have since drifted apart. Seafloor Spreading is about the formation of new oceanic crust, Plate Tectonics is a broader theory that includes continental drift and seafloor spreading, and Paleomagnetism is the study of the Earth's magnetic field in rocks.
• For the third question: Tectonic plates can contain both oceanic and continental crust. For example, the North American Plate has both continental crust (North America) and oceanic crust (parts of the Atlantic Ocean floor).

Answer:

1. True
2. Continental Drift
3. False