Geology and Natural Disasters Flashcard

Front

What causes magma to form in the mantle?

Back

Extreme heat, pressure changes, or water

Front

What pushes magma upward through the Earth’s crust?

Back

Expanding gases and pressure buildup

Front

Which event triggered Mount St Helens’ eruption?

Back

Earthquake and landslide

Front

Which gas is NOT commonly released during a volcanic eruption?

Back

Oxygen

Front

What forms above a volcano during an eruption?

Back

Massive ash clouds

Front

What device measures earthquake waves?

Back

Seismograph

Front

Which wave movement describes a tsunami at sea?

Back

Fast, long waves across the ocean

Front

What happens as a tsunami nears shore?

Back

Waves slow down and increase in height

Front

Thrust fault

Back

Upper plate moves up

Front

What type of fault moves plates horizontally?

Back

Strike-slip fault