Vulkanisme

Multiple Choice

What are the two main types of volcanism described in the first image, and how do they differ in terms of magma movement?

• Intrusion and extrusion; intrusion stays inside the Earth, extrusion reaches the surface.

• Linear and areal; linear is a straight eruption, areal is a wide eruption.

• Central and maar; central erupts from one point, maar forms a wide crater.

• Effusive and explosive; effusive is gentle, explosive is violent.

Multiple Select

Which of the following are types of magma eruptions based on the place where magma exits the Earth's surface?

• Linear eruption

• Areal eruption

• Central eruption

• Maar eruption

Multiple Choice

Which of the following statements about shield volcanoes is correct?

• They are formed by explosive eruptions and have steep sides.

• They are formed by effusive eruptions and have broad, gentle slopes.

• They have a wide crater due to explosive eruptions.

• They are the most common type of volcano in the world.

Multiple Choice

Which of the following is a characteristic of an effusive volcanic eruption?

• It produces steep-sided volcanoes and loud explosions.

• It releases magma that flows gently, forming gentle slopes.

• It is always accompanied by pyroclastic flows.

• It only occurs in deep magma sources.

Multiple Select

Which factors determine the type of volcanic eruption?

• Viscosity of magma

• Gas pressure

• Depth of magma chamber

• Amount of rainfall

Multiple Choice

What distinguishes the Plinian (Peret) type eruption from other types of volcanic eruptions?

• It has low gas pressure and shallow magma source.

• It produces shield-shaped volcanoes.

• It involves very high gas pressure and deep magma sources, with eruptions reaching up to 85 km high.

• It only produces lava flows without ash clouds.

Multiple Choice

Which of the following is NOT a sign that a volcano is about to erupt?

• The temperature around the crater increases.

• Many water sources dry up.

• Animals climb up the mountain due to heat.

• Steam and hot water sources appear.