Unit 5: Plate Tectonics

Question 1

Divergent plate boundary

Answer 1

Oceanic plates move apart and magma from the mantle rises to the surface.

Question 2

Convergent plate boundary

Answer 2

Plates move toward one another and collide, creating a lot of pressure.

Question 3

Transform plate boundary

Answer 3

Plates move sideways past each other.

Question 4

Landforms from divergent boundaries

Answer 4

Seafloor spreading, rift valleys, and mid-oceanic ridges.

Question 5

Landforms from convergent boundaries

Answer 5

Faults, faults zones, mountains, volcanoes.

Question 6

Environmental effects from divergent boundaries

Answer 6

Widens ocean floors.

Question 7

Environmental effects from convergent boundaries

Answer 7

Tsunamis, volcanic eruptions.

Question 8

Environmental effects from transform boundaries

Answer 8

Earthquakes can cause millions of dollars in damage to communities. They can destroy habitats leading to organisms needed to adapt.

Question 9

Why do earthquakes occur?

Answer 9

The rocks of the lithosphere move quickly and unexpectedly along a fault. Result of the movement of plates and their contact with each other.

Question 10

Why do volcanoes occur?

Answer 10

Molten magma beneath the crust is released into the atmosphere.

Question 11

Hotspot

Answer 11

Where molten material rises and connects with the lithosphere, forms volcanoes.

Question 12

Crust

Answer 12

Thinnest; continental and oceanic; made mostly of Silicon and Oxygen.

Question 13

Lithosphere

Answer 13

Crust and upper mantle; the plates are here; where minerals are mined.

Question 14

Mantle

Answer 14

Made mostly of silicon and oxygen.

Question 15

Asthenosphere

Answer 15

Upper region, semi-molten (magma, convection currents).

Question 16

Outer core

Answer 16

Made of mostly liquid iron and nickel.

Question 17

Inner core

Answer 17

Made of mostly solid iron and nickel.

Question 18

Earth’s structure

Answer 18

Crust, (lithosphere), mantle, (asthenosphere), outer core, inner core.