B. Caldera: largest
A 4. Taal volcano erupted in the year 1965 due to contact of water and hot rocks. How car
volcanic eruption be classified?
A. Phreatic
B. Vulcanian
C Strombolian D. Phreatomag
5. It is characterized by tall eruption columns that reach up to 20 km high with pyroclastic
and ashfall tephra like that of Paricutin Volcano in Mexico.
A Phreatic
B. Vulcanian
C Strombolian D. Phreatomag
6. Which of the following analogy is correct about volcanic eruptions and its cause?
A. Phreatic: hot rock and magma
C. Phreatic: hot rock and pressure
B. Phreatomagmatic: magma and water D. Phreatomagmatic: pressure and
7. Which characteristics of magma mainly determines its explosiveness?
A Color
B. Amount
C Temperature D. Silica Conte
8. Why volcanoes erupt?
I. Because of moving tectonic plates
II. Because of earthquake
III. Because of the movement of magma
A. I
BI!
Cland I
D. I, II, at
volcanoes have very sticky and thick lava, which can make the
explosive when they erupt.
A. Composite
C. Shield
B. Cinder
D. Composite, Cinder, and Shie
10
volcanoes have a lava that is extremely fast and can cover large are
uickly
A. Composite
C. Shield
B. Cinder
D. Composite, Cinder, and Shie
11. What is/are the factor/s that affect/s volcanoes' eruptive style?
Magma's temperature
Il Chemical composition
11 Amount of dissolver
9.​