Chapter 6 Science

Question 1

volcanoes

Answer 1

a consequence of moving plates

Question 2

where does volcanic activity occur?

Answer 2

convergent and divergent plate boudaries plus hot spots

Question 3

silica in magma

Answer 3

more high viscosity, less low viscosity

Question 4

fissure eruptions/ flood basalts

Answer 4

lava plateau, assocaited with MOR’S and hot spots creates lava flow. low viscosity

Question 5

the cascades

Answer 5

a chain of volcanoes that are close to each other

Question 6

why is the chain of volcanoes here?

Answer 6

converget plate boundary, ocean countaine boundary

Question 7

why arent these volcanoes always erupting?

Answer 7

magma needs to fill up

Question 8

prediciting volcanic eruptions

Answer 8

shape, seismic activity, gasses, spikes in co2

Question 9

Volcanoe types

Answer 9

Shield volcanoes, stratovolcanoes, cinder cone

Question 10

shield volcanoes

Answer 10

broad, gently sloping sides built up from thousands of fluid, low viscosity lava flows, rise from the ocean floor, found above oceanic hot spots, or divergent plate boundaries

Question 11

stratovolcanoes

Answer 11

steep sided, cone shaped, form along convergent boundaries, violent style of eruptions, composed of many layers of airborne volcanic debris, pyroclastic flow deposits

Question 12

what can shield volcanoes become?

Answer 12

stratovolcanoes from viscous magmas of shield volcanoes

Question 13

what type of volcanoes have narrower base and more steeply sloping sides?

Answer 13

stratovolcanoes

Question 14

what is the smallest type of volcanoes?

Answer 14

cinder cone

Question 15

Cinder cone

Answer 15

composed of coarse tephra produced when gas escapes rapidly from molten lava, easily eroded, simplest

Question 16

which type of volcanoe can occur on a strato or a shield?

Answer 16

cinder cone

Question 17

other volcanic landforms

Answer 17

calderas, lava plateaus, geysers, hot springs, fumeroles, and mud volcanoes

Question 18

Caldera

Answer 18

a crater that forms when a stratovolcano or shield volcano collapses into a shallow, empty magma chamber below the volcano

Question 19

lava plateaus

Answer 19

low viscosity lava that reaches the surface through fissures. layers of solidified basalt lava, released volumes of volcanic gases, very dangerous, doesn’t require eruption