Earth Science

Front 1

sillica-rich minerals have a blank melting temperature than sillica-poor minerals.

Back 1

lower

Front 2

limited melting, involving only some minerals

Back 2

partial melting

Front 3

basaltic magmas are low sillica content, low viscosity. are characteristic of divergent plate boundaries and oceanic hot spots

Back 3

o

Front 4

Andesite magma is generated along convergent plate boundaries, where oceanic lithosphere distends into the mantle at subduction zones

Back 4

o

Front 5

Rhyolitic magma, the most viscous magma, has a high sillica content and is formed frompartial melting of the continental crust.

Back 5

o

Front 6

Three common indicators are typically observed during the days or weeks prior to an eruption

Back 6

Increased frequency of earthquakes (2) rapid changes in the shape of the volcano (3) large-scale emissions of common volcanic gases, especially sulfur dioxide.

Front 7

Stream gradient decreases while stream velocity increase down stream

Back 7

o

Front 8

The smaller the wetted perimeter the faster the velocity

Back 8

o

Front 9

Largest river in the world

Back 9

Nile

Front 10

How is stream discharge determined?

Back 10

Depth x width x velocity

Front 11

Which of the following is most closely related to stream "stage"?

Back 11

depth

Front 12

o

Back 12

o