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Q2W5 Quiz
| Question | Answer |
|---|---|
| True or False? Plate boundaries that converge on one another, causing one plate to subduct beneath another, explains how the size of Earth's surface has shrunk considerably over the past 600 million years | False. All evidence of Earth's past size points to a nearly constant size since the planet's formation 4.6 billions years ago. |
| What process created and is continuing to form the Himalayan Mountains? | Collision at a convergent boundary, The Indian plate and the Eurasian plate are colliding to form the Himalayas. |
| Ocean trenches are formed by | Ocean trenches are formed as an oceanic plate subducts underneath another plate. |
| The location where one plate sinks beneath another plate is called a ______. | subduction zone |
| Name two landforms are caused by convergent plate boundaries. | an ocean trench and a mountain range |
| What are the two types of crust and how are they different? | Crust types: oceanic and continental Oceanic crust is 4-6 miles deep and is very dense. Continental crust is 20-40 miles deep and is less dense than oceanic crust. |
| Why are the youngest rocks on the ocean floor found at the mid-ocean ridges? | Because that is where the plates are pulling apart, allowing magma to reach the surface and form new rock. |
| Why doesn't the Earth get bigger if all of that new rock is being added at the mid-ocean ridges? | Because the other side of the plates are being pushed back down into the mantle where they will be recycled. |
| How can scientists tell when the reversals of the magnetic field occurred? | by measuring the distance between the mid-oean ridge and the ocean floor band. |
| What pieces of evidence did Wegener present to support his hypothesis on continental drift and Pangaea? | Some of the evidence included fossil distribution, the shapes of the continents, animal and plant dispersal and ancient climates. |
| Wegener was criticized by scientists because of his _______. | lack of evidence for any mechanism by which massive continents could move through ocean basins |
| Earthquakes occur as which type of boundary? | all 3 types of boundaries have earthquakes |
| Which of the following types of plate boundaries is constructive? | divergent - constructive means to make. New land is being made at divergent boundaries. |
| What is a process that occurs at divergent boundaries? | new crust is formed, earthquakes, mountain ranges are formed, rift valleys are formed, ocean ridges are formed |
| How are oceanic and continental crust different? | Oceanic crust is thinner and denser than continental crust. |
| What are the mechanisms that have been proposed to explain the movement of Earth’s tectonic plates? | mantle convection, ridge push, and slab pull |
Created by:
MsLW
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