I vulcani e i terremoti - Exercises in English #609919

Shield volcanoes

A:

display effusive activity with abundant emission of pyroclasts

B:

display explosive activity with abundant emission of lava

C:

are usually fed with acidic magma

D:

are usually fed with basic magma

Scelta multipla

Surface seismic wave

A:

are divided in primary and secondary waves

B:

are slower than waves that travel inside the Earth

C:

are longitudinal waves

D:

are the first to be recorded by a seismometer

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Volcanoes and earthquakes

a. Scorias have a size less than .
b. A depression that is formed following the collapse of large portions of the volcanic edifice is called .
c. The point inside the lithosphere from which P and S waves are propagated is .
d. The projection point of hypocentre on Earth’s surface is .
e. For each unit increment of magnitude the strength of a seism increases .

Completamento aperto

The Gutenberg discontinuity

The Gutenberg discontinuity separates

A:

the crust from the mantle

B:

the inner core from the outer core

C:

the core from the mantle

D:

the crust from the core

Scelta multipla