3RD QUARTER SUMMATIVE TEST IN SCIENCE 9
1.What do you call the opening or vent in a volcano?
A. base B. slope C. crater D. magma chamber
2. Tall, cone shaped mountains in which layers of lava alternate with layers of ash are
called ____
A. Cinder cones B. Shield volcanoes C. Composite volcanoes D. Calderas
3. Which of the following is an inactive volcano in the Philippines?
A. Kanlaon in Negros Oriental C. Pulung in Zamboanga Peninsula
B. Taal in Batangas D. Mayon in Albay
4. Which of the following characteristics of a volcano depends on its magma emission?
A. age B. size C. shape D. location
5. Which of the following characteristics best describes a cinder cone
A. with broad summit area
B. tall and conical and built up by several strata of eruptive materials
C. is a small volcano built primarily of pyroclastic materials ejected from a single vent.
D. Have quiet lava flows that covers a large area.
6.This type of volcano is the most violent and explosive?
A. Cinder Cone B. Composite Cone C. Shield D. Caldera
7.Where is Mt. Mayon located?
A. Albay B. Batanes C. Batangas D. Leyte
8. It is a natural opening in the surface of Earth where molten rocks, gases, smoke & ash are
ejected.
A. Magma B. Volcano C. Lava D. Cone
9.Which type of volcano has a very broad shape and slightly dome structure?
A. Caldera B. Cinder Cone C. Stratovolcano D. Shield Volcano
10. It is a magma that has been ejected out of a volcano
A. Lava B. Cinder C. Ash D. Silica
II. Fill in the blanks. Fill in the missing word to complete the sentence.
11. Volcanoes built up of alternating layers of rock particles and lava are called _____ volcanoes.
12. Volcanoes with no record of eruptions are considered as __________.
13. A _______is a small volcano built primarily of pyroclastic materials ejected from a single vent.
14. __________volcanoes are volcanoes that have erupted within the last 600 years.
15. ________ volcanoes are produced by the accumulation of fluid basaltic lava and have the
shape of a broad, slightly dome structure.
16. The _______ of the magma depends on its magma emission.
17. ________ volcano in the Philippines is known to have 47 craters.
18._________ volcanoes are those that have not erupted for the last 10, 000 years and them
physical form is being changed by agents of weathering and erosion through formation of deep.
and long gullies.
19. ________is a Philippine national institution dedicated to provide information on the activities
of volcanoes, earthquakes, and tsunamis, as well as other specialized information and services
primarily for the protection of life and property and in support of economic, productivity, and
sustainable development.
20. A ______ is a vent in the Earth’s crust from which materials such as molten rock and steam
are ejected. 1. Which of the following is the property of material’s resistance to flow?
A. elasticity B. viscosity C. toxicity D. velocity
22. Which characteristics of magma mainly determines its explosiveness?
A. Color B. Temperature C. Amount D. Silica Content
23. A type of volcanic eruption characterized by fountain lava
A. Phreatomagmatic B. Strombolian C. Vulcanian D. Plinian
24.How does the release of trapped gases in magma cause a volcano to erupt?
A. Lava will pour out the sides of the mountain.
B. Solid rock on Earth’s crust starts to melt.
C. Magma starts to accumulate around the mountain.
D. Under tremendous pressure, magma is forced to the surface of Earth’s crust.
causing an explosion
25.Why do geologists call volcanoes as “windows” into Earth’s interior?
A. Earthquakes can be predicted.
B. There are openings on top of volcanoes.
C. Gases and rock particles come out during explosions.
D. Earth’s interior can be studied through the chemical composition of the lava.
26.The higher the temperature of magma is, the _________ its viscosity is.
A. higher B. slower C. lower D. faster
27.Excessively explosive type of eruption of gas and pyroclastic just like Mt. Pinatubo
A. Phreatic B. Strombolian C. Vulcanian D. Plinian
28. The government agency tasked with monitoring earthquakes and volcanoes in the
country.
A. DOE B. PHIVOLCS C. DOH D. PAGASA
29.This type of volcanic eruption is considered as the most explosive and powerful of all
eruptions,
A. Vulcanian B. Strombolian C. Plinian D. Phreatic
30. Which of the following factors helps determine whether a volcanic eruption will be
violent or relatively quiet?
A. temperature of magma C. number of dissolved gases in magma
B. composition of magma D. all of them
Modified True or False: Write the word True on the blank if the statement is correct. If it is not, change the
underlined word/s and write your answer on the space provided.
_____31. The higher the silica content the more explosive the eruption of volcano
_____32. The lower the temperature of magma is, the lower its viscosity.
_____33. The lava is less viscous if the gas dissolved in it is greater.
_____34. All volcanoes erupt violently and destructively.
_____35. Mt. Pinatubo in Zambales is one of the inactive volcanoes in our country.
_____36. Gases from a volcano may cause environmental problems.
_____37. A volcano is more likely to be explosive when lava is thin and runny.
_____38. Viscosity is the property of materials to flow.
_____39. Phreatic eruption is the most violent type of volcanic eruption.
_____40. PAGASA is the government agency tasked with monitoring earthquakes and
volcanoes in the country