Mt. Pinatubo 1 & 5 Years Later

_________________ looks like wet concrete.

• Hot spots

• Tephra

• Caldera

• Lahars

The eruptions removed so much magma and rock from below the volcano that 492 feet of the peak collapsed into the vent - it is a shallow, bowl shaped ________________ over 1.5 miles wide.

• tephra

• caldera

• subduction zone

• hydrothermal vent

What two products are now in short supply a year later?

Which sphere is mostly affected by the lahars?

• biosphere

• atmosphere

• lithosphere

• hydrosphere

One year later, people are in constant fear of _____________.

Fertilization of soil is a long-term effect to the ____________ caused by volcanic eruptions.

• lithosphere

• hydrosphere

• atmosphere

• biosphere

True or False? The eruption of Mt. Pinatubo has affected the entire world.

• True

• False

What happened to the ash clouds from the eruption? Select all that apply.

• The circled the globe only once.

• They circled the globe several times.

• The sulfur dioxide in the clouds were shot into the stratosphere.

• The carbon monoxide in the clouds were shot into the stratosphere.

Heavy rains that fell during the 1994 ___________ season triggered numerous lahars, which again devastated the region.

• volcano

• hurricane

• typhoon

• monsoon

The __________________ that filled the valleys have kept their heat. Temperatures as high as 900 degrees are being recorded.

• calderas

• pyroclastic flows

• tephra

• hydrothermal vents