5 Written Questions
5 Matching Questions
- oceanic crust
- Continental Drift
- Explain how records of magnetic reversals show that plates move apart
- What are the three types of boundaries?
- a includes all the ocean floors. the crust is home to all life on Earth.
- b Divergent boundary
- c The process by which an oceanic tectonic plate sinks under another plate into Earth's mantle
- d A hypothesis made by Alfred Wegener that Earth's continents were once joined together in a single landmass and gradually moved or drifted apart.
- e The farther away from the ridge, the older the record of reversals on both sides of the ridge. This shows that the plates move away from the center.
5 Multiple Choice Questions
- includes all the continents and some major islands
- At transform boundaries
- as plates move apart, new crust is built, forming mid-ocean ridges and rift valleys
- made up of the curst and the very top of the mantle and is the most rigid of all layers.
- molten rock that rises through cracks in the crust, cools, and forms new oceanic crust.
5 True/False Questions
When does folded crust form mountains? → When it is pushed up high
Asthenosphere → a layer of liquid metals that surround the inner core. the lower pressure allow's the metals to remain a liquid.
convection → a layer of liquid metals that surround the inner core. the lower pressure allow's the metals to remain a liquid.
What happens in a magnetic reversal? → Earth's magnetic north and south poles switch places.
Age of sea floor → Earth's thickest layer is made of hot rock that is less dense than the core