Multiple Choice Quizzes with Answer in English (Page: 326)

Earthquakes usually occur at boundary of –

• coral plate
• crustal plates
• volcanic beds
• all of the above

P waves are:

• tensional surface waves.
• transverse surface waves.
• compressional body waves.
• none of the above

Body waves consist of the:

• S waves only
• P waves only
• Surface waves
• Both the S waves and P waves

Earthquakes occur when there is a sudden release of stored up energy in Earth’s –

• outer core
• inner core
• upper mantle
• none of the above

Basic lava erupts out of volcano, throwing out mainly –

• CO
• dust
• ash
• all of the above

Magma which is forced onto Earth’s surface is known as –

• Lava
• Vent
• Cone
• None of the above

Layers of volcanic materials that build up around vent to form a cone-shaped structure are known as –

• Crater
• Vent
• Cone
• None of the above

Eruptions of composite volcanoes are loud and violent because that contain –

• basic lava
• viscous composite lava
• viscous acid lava
• none of the above

Acid lava flows slowly as it is highly –

• dense
• viscous
• sensitive
• all of the above

This is the scale used to measure the size of volcanic eruptions –

• Richter Scale
• Volcanic Explosivity Index
• Volcano Eruptivity Scale
• None of the above