Quarter 3 – Module 2: Causes and Nature of Volcanic Eruption

When a volcano ejects acid lava, the eruption is usually__

• Soft and less violent
• Loud but less violent
• Light and less violent
• Loud and more violent

In some eruptions, mudflows are forced over the__

• Ocean bed
• Earth’s core
• Earth’s mantle
• Earth’s surface

The magma which is forced onto the Earth’s surface is known as:

• Vent
• Cone
• Lava
• Magma chamber

During eruptions, the volcanic materials are____

• Blown to some feet
• Blown to some meters
• Blown to some inches
• Blown to many kilometers

The divergence of plates allows magma from the mantle to reach the surface as___

• Ice
• Lava
• Rocks
• Stones

Volcanoes that erupt frequently are known as___

• Active volcanoes
• Extinct volcanoes
• Instinct volcanoes
• Dormant volcanoes

The world’s underwater ridges and islands were formed as a result of__

• Volcanism at hotspot
• Underwater volcanism
• Earthquake volcanism
• Volcanism at destructive plate boundary

Active volcanoes are most likely to be found __

• In the Pacific Ring of Fire
• In convergent boundaries
• Where tectonic plates collide
• All of the above

When magma is thick with more dissolved gas, we can expect the volcanic eruption to be a/an___

• Oozing ash and lava
• Spewing water like a geyser
• Lava fronting over the crater
• Violent ejection of ash and lava

Volcanoes exist along ridges of tectonic plates. Mt. Vesuvius exists between which tectonic plates?

• African plate and Eurasian plate
• Antarctica plate and Eurasian plate
• Indo-Australian plate and African plate
• Eurasian plate and North American plate