Volcanoes and Sinkholes Quiz handout 5

What is a volcano?

• A mountain formed by erosion

• A rupture in the earth's layer where liquefied rock erupts

• A type of earthquake

• A large body of water

What is lahar?

• A type of lava

• A flow of hot/cold mixture of water and rock materials

• A type of volcanic gas

• A volcanic ash

Which volcanic hazard consists of very small jagged pieces of glass and rock?

• Volcanic gases

• Pyroclastic flow

• Ash fall

• Lava flows

What is a pyroclastic flow?

• A slow-moving lava

• A high-density mixture of dry and hot fragments of rocks and gases

• A type of volcanic gas

• A form of ash fall

What should you do before a volcanic eruption?

• Know the evacuation plan of your community

• Stay in low areas

• Leave your survival kit at home

• Ignore local news

What causes sinkholes?

• Volcanic eruptions

• Heavy rainfall only

• Chemical dissolution of rocks

• Earthquakes

Which type of sinkhole develops abruptly and can cause catastrophic damages?

• Natural sinkholes

• Cover subsidence sinkholes

• Cover-collapse sinkholes

• Solution sinkholes

What is a common sign that a sinkhole may be forming?

• Strong winds

• Heavy snowfall

• Sagging fence posts or trees

• Clear water in wells

What should you do if you are trapped in a sinkhole?

• Try to climb out immediately

• Dig around you to escape

• Make noise but avoid digging

• Stay silent and wait

What is the primary cause of rainfall-induced landslides?

• Volcanic eruptions

• Earthquakes

• Prolonged rainfall

• Human activities