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.

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.

Which of the following is TRUE about cinder cone volcanoes?

• 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.

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

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

Which of these is CORRECTLY matched?

• A. 1: magma flow

• B. 2: magma chamber

• C. 3: slope

• D. 4: lava

What is the term used to represent the opening of the volcano where magma comes out?

• A. chamber

• B. crater

• C. summit

• D. vent

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. Icelandic

• B. Vulcanian

• C. Plinian

• D. Strombolian

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.

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