Your Email Address (NOT required)

1.Which of the environmental problems is not caused by volcanoes?
Rains of Ash can cause houses to collapse.
Breathing problems.
Major damage to aviation.
None of the above.

2.Which of the following means "glowing avalanche"?
Lava fountain.
Nuée ardente.
Debris avalanche.
Lahar.

3.How can beautiful sunsets be caused by very large volcanic eruptions?
when the Greenhouse effect has been worsened by the volcanic ash
when sulphuric acid and aerosols get into the stratosphere
when the ash particles attract water droplets
when there is intense heat due to the hot lava

4.Kilauea Volcano is
a dormant volcano
an extinct volcano
an explosive volcano
an active volcano

5.Volcanic plugs are formed when
lava solidifies in the crater of an extinct volcano.
Lava solidifies on the cone of an active volcano.
A volcano is formed.
Lava solidifies in the pipe of an extinct volcano.

6.Which of the following is true?
Worldwide effects of volcanic eruptions only occur when there are huge explosive eruptions that throw materials into the troposphere.
Explosive volcanic eruptions do not cause landslides.
El Nino is a huge disruption of the Earth's plates.
Crater lakes are formed when water is collected in craters.

7.Which of the following is true about non-explosive volcanic eruptions?
They result in quiet emissions of lava flows.
These do not form spatter cones.
Lava flows from these eruptions always cover vast areas.
They usually kill people.

8.Which of the following is true about explosive volcanic eruptions?
They do not cause pyroclastic surges and debris avalanches.
The large amounts of ash produced cannot cause a major damage to aviation.
They don't produce nuées ardentes.
They are devastating and can be very dangerous to people.

9.Which of the following is false about explosive volcanic eruptions?
The large amounts of ash can cause breathing problems.
They produce fragmental rocks from erupting lava and surrounding country rock.
They usually don't produce pyroclastic flows.
They can cause lahars to occur.

10.Which of the following is not a consequence of a volcanic eruption?
Caldera
A lot of rain near the volcano during an eruption
A rain of ashes and mud from the volcanic eruption can overwhelm cities
Earthquakes