Volcanic Activity and Earthquake Concepts

What was the significant outcome of the Mount St. Helens eruption in 1980?

• It created a new mountain.

• It was the most deadly and costly volcanic eruption in U.S. history.

• It caused a tsunami.

• It led to the discovery of a new species.

What is the primary purpose of the Cascades Volcano Observatory?

• To predict weather patterns.

• To study marine life.

• To monitor and study the behavior of volcanoes.

• To explore outer space.

What does the Mars Insight Lander aim to study?

• The surface of the Moon.

• The rings of Saturn.

• The deep interior of Mars.

• The atmosphere of Jupiter.

What is the function of the Spider instrument in volcanic monitoring?

• To measure temperature.

• To monitor areas unsafe for humans by detecting seismicity, infrasound, and volcanic lightning.

• To study ocean currents.

• To predict weather changes.

Why is volcanic ash hazardous to jet engines?

• It makes the engines heavier.

• It melts inside the engine, causing it to overheat.

• It causes the engines to rust.

• It blocks the fuel supply.

What is the primary cause of the explosiveness of a volcanic eruption?

• The presence of minerals in the magma.

• The temperature of the magma.

• The amount of gas in the magma.

• The amount of water in the magma.

What is the main difference between the volcanic rocks from Mount St. Helens and Kilauea?

• Kilauea rocks are darker in color.

• Mount St. Helens rocks are made of metal.

• Kilauea rocks have more bubbles due to less gas in the magma.

• Mount St. Helens rocks are heavier.

What is the lithosphere?

• A layer of the atmosphere.

• A type of seismic wave.

• A type of volcanic rock.

• The outermost layer of the Earth's crust.

What is the purpose of the base isolation developed out of Legos in the earthquake experiment?

• To make the structure taller.

• To help the building slide and reduce the impact of the earthquake.

• To make the structure more rigid.

• To add weight to the structure.

What is the significance of the Space Needle's construction in terms of earthquake resistance?

• It is made entirely of wood.

• It combines materials like concrete and steel to be both solid and flexible.

• It has no special earthquake-resistant features.

• It is built on a floating foundation.