Directions: Choose the letter of the best answer. Write the chosen letter on a

separate sheet of paper.

1. Which statement is INCORRECT?

A. Volcanoes give information about inner Earth.

B. Volcanoes can be found on land and ocean floor.

C. Volcanoes show precursory signs before eruption.

D. Volcanoes that do not produce lava is not dangerous.

2. Which of the following CORRECTLY describes the main vent of the volcano?

A. It is the part where magma is stored.

B. It is the central tube-like structure of the volcano.

C. It is the smaller outlet through which magma is ejected.

D. It is the channel through which magma travels to the surface of the

Earth
For questions 3-5, refer to Figure 1.1 (Parts of a volcano)

Illustrated by: Ellissa Christie Kaye L. Murillo

3. Which of these is CORRECTLY matched?

A. 1: magma flow

B. 2: magma chamber

C. 3: slope

D. 4: lava

4. What part of the volcano serves as the region under the surface of the Earth where

hot molten magma is collected?

A. lava flow

B. main vent

C. secondary vent

D. magma chamber

5. What is the term used to represent the opening of the volcano where magma

comes out?

A. chamber

B. crater

C. summit

D. vent

6. What type of volcanoes are formed from viscous or sticky lava that does not flow

easily?

A. cinder cones

B. composite volcanoes

C. lava domes

D. shield volcanoes

7. Which of the following is TRUE about cinder cone?

A. It is built from particles and blobs of solidified lava ejected from a single

vent.

B. Lava coming out from this volcano is not accompanied by pyroclastic

materials.

C. Lava blown out from this volcano breaks into small fragments solidify and

fell as cinder around the vent.

D. It is formed from viscous magma being erupted effusively onto the surface

and then piling up around the vent.
8. Which type of volcanoes have broad bases and steep slopes and are formed by

alternating layers of lava flows, volcanic ash, cinders, blocks and pyroclastic

materials?

A. cinder cones

B. composite volcanoes

C. lava domes

D. shield volcanoes

9. What is the basis of classifying volcanoes as active or inactive?

A. size of the base

B. shape of the cone

C. age of the volcano

D. records of eruption

10. Which of the following statements is CORRECT?

A. Active volcanoes do not have magma supply while inactive volcanoes

have magma supply.

B. Active volcanoes exhibit volcanic activity within the last 10 000 years

while inactive volcanoes have no record of eruption.

C. Inactive volcanoes are those that erupted recently and showing regular

activity while active volcanoes exhibit no sign of volcanic activity.

D. Inactive volcanoes exhibit sign of emissions of molten materials and gases

while active volcanoes show no sign of emission

11. Which are considered active volcanoes in the Philippines?

I. Mayon Albay III. Kanlaon in Negros Island

II. Calayan in Cagayan IV. Hibok-hibok in Camiguin

A. I and II only

B. I, II, and III only

C. I, II, and IV only

D. I, III, and IV only

12. The eruption of Mount Pinatubo in the Philippines on June 15, 1991, was the

second largest of the 20th century. Its eruption was characterized as an

excessively explosive type of eruption of gas and pyroclastic. Which type of the

eruption is this?

A. Phreatic

B. Phreatomagmatic

C. Plinian

D. Strombolian

13.Which of these is TRUE for a Phreatomagmatic eruption?

A. It is a silent eruption due to oozing lava

B. Its eruption is characterized by fountain lava.

C. Its eruption has resulted to sideway emission of pyroclastic.

D. It is a short-lived eruption and maybe an onset of a major eruption.

14. What is the most important sign of an impending volcanic eruption which is also

referred as seismic activity?

A. crater glow

B. ground swell

C. volcanic tremor

D. dried vegetation

15. Which of these is NOT a sign of a forthcoming volcanic eruption?

A. crater glow

B. volcanic tremors

C. drying up of vegetation

D. increased amount of rainfall

paki sagutan po please​