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8.9B Plate Boundaries And Features

Test Description: A review of tectonic plate boundaries and features

Instructions: Answer all questions to get your test result.

1) When two oceanic plates converge what happens

Aunderwater volcanoes that create volcanic islands Bboth stop moving CUnderwater mountains Done pushes up and becomes a continental crust

2) What features form in ocean ridges

ATrenches BDeltas CUnderwater Mountains and Volcanoes DFaults

3) How are the Himilayan Mountains forming

AThey have always been there BA tectonic plate moving over a hot spot in the earths core. CTwo Continental Plates are crashing into eachother DLave from a rift zone is coming out, cooling and forming growing mountains

4) What are island arcs?

AA series of volcanic islands in an arc formed from a convergent subduction zone. BAn island that has broken free from land as a result of weathering and erosion CIslands formed by magma escaping from a fault after an earthquake. DIslands formed from an ocean ridge in a divergent boundry

5) Where is the crust the most new on our planet

AIn the Himalayan mountains BIn a ridge but not a rift CAt a subduction zone DIn a rift or ridge. As the crust moves away it gets older and older.

6) Which boundary is found at the Mid Atlantic Ridge

ATransform BConvergent CDivergent DSubduction

7) Trenches are the result of what type of boundary

ATransform BSubduction CDivergent DContinental Convergent

8) What MUST be present for volcanoes to form

AA fault line BDivergent boundary CConvergent boundary DOceanic Crust

9) Where are underwater volcanoes found

Athere is no such thing Bat transform boundaries Cat divergent boundaries and the ring of fire DAt convergent boundaries

10) What is sea floor spreading

AWhen trenches form from underwater mountains folding BWhen the ocean opens at a divergent boundary and new crust is created from escaping magma CWhen old crust is destroyed in an ocean ridge DWhen oceanic crust stretches and grows at up to 1 inch per year to allow the earth to grow larger

*select an answer for all questions

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