3rd Quarter Mastery Test in Science 9

3. The Department of Science and Technology (DOST) is the executive department of the Philippine government responsible for coordination of science and technology-related concerns. One of its service agencies focus on the mitigation of disasters that may arise from volcanic eruptions, earthquake, tsunami and other related geotectonic phenomena. What is the DOST service agency concerned for the volcanic and earthquake activity?

• Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA)

• National Aeronautics and Space Administration (NASA)

• Department of Tourism (DOT)

• Philippine Volcanology and Seismology (PHIVOLCS)

4. Volcanoes come in different shapes and sizes and each has a unique history of eruption. How will you classify volcanoes that those have a record of eruption within the last 600 years or those that erupted 10, 000 years ago based on analyses of their materials?

• Inactive Volcanoes

• Active Volcanoes

• Super Volcanoes

• Stratovolcanoes

5. There are about three hundred (300) volcanoes in the Philippines. Twenty-four (24) of these are active volcanoes as of February 2021 while the larger percentage remains dormant as of the record. Which of the following are active volcanoes?

I. Mt. Mayon in Albay

II. Mt. Taal in Batangas

III. Mt. Apo In Davao del Sur

IV. Mt. Kanlaon in Negros Oriental

• I and II only

• I and III only

• I, II and III only

• I, II and IV only

6. Volcanoes are described according to its eruptive style. They are generally classified as wet or dry depending on the magma’s water content. How will you classify an eruption of a periodic weak to violent eruption characterized by fountain lava?

• Strombolian

• Phreatomagmatic

• Plinian

• Vulcanian

8. An excessively explosive type of eruption of gas and pyroclastic, just like our Pinatubo Volcano in Zambales is called ______________.

• Strombolian

• Phreatomagmatic

• Plinian

• Vulcanian

9. A type of eruptive style characterized by tall eruption columns that reach up to 20 km high with pyroclastic flow and ashfall tephra.

• Strombolian

• Phreatomagmatic

• Plinian

• Vulcanian

12. Volcanic activity can be very fascinating and after an explosive eruption, a change in its slope can be observed. The emissions of a volcano provide us with clues on what materials are found inside the Earth. What determines the nature of volcanic eruption?

I. Magma’s Temperature

II. Crater’s size

III. Chemical composition

IV. Cone’s shape

V. Amount of dissolved gases

• I, II, III only

• II, IV, V only

• I, III, V only

• I, III, IV only

16. Volcanologist have been able to classify volcanoes according to their volcanic types according to their shape of their cones. How will you classify the cones of volcanoes that are large, nearly perfect sloped structure formed from alternate solidification of both lava and pyroclastic deposits.

• Cinder Cones

• Shield Cones

• Composite Cones

• Definite Cones

18. Volcanologist have been able to classify volcanoes according to their volcanic types according to their shape of their cones. How will you classify the cones of volcanoes that are formed by the accumulation of lava that oozes out from the volcano?

• Cinder Cones

• Shield Cones

• Composite Cones

• Definite Cones

19. Volcanoes are Earth’s geologic architects. They’ve created more than eighty percent (80%) of planet’s surface, laying the foundation that has allowed life to thrive. In the Philippines there are about three hundred (300) volcanoes and twenty-four (24) of these are active volcanoes. Why Philippines is home to many volcanoes?

• It is located long the Ring of Fire

• It is an Archipelago

• It is near at the Pacific Ocean

• It is having many beautiful tourist spots