Plate Tectonic & WA State

• Which type of plate boundaries can volcanoes form? A. Transform B. Divergent C. Convergent
• How do we know the structure of the Earth?

  Seismic waves
• Why is Washington at risk of earthquakes, tsunamis, and volcanic eruptions? A. Fault Line B. Juan De Fuca Plate C.DIvergent
• The three types of seismic waves are P-waves, S-waves, and surface waves.
• P-waves travel faster than S-waves because they have more energy.
• Which Type can only cause Earthquakes?

  Transform Boundary
• Which type is the fastest wave?

  p-wave
• What type has a transverse wave?

  S-wave
• What type of wave that travels through the earth's crust?

  L-wave
• Is S-wave longitudinal or transverse?

  Transverse
• Is P-wave transverse or longitudinal?

  Longitudinal
• Which is more dangerous, Red eruption or Gray eruption?

  Gray eruption
• a fast-moving current of hot gas and volcanic matter
• What are the 3 types of seismic waves?

  S-wave, L-wave, P-wave
• Most dangerous volcanoes in the U.S cuz of the lahars are the Mount Rainier and Mount St. Helens
• what did the scientists find on the Oregon coast?

  Leaking in the ocean floor
• What type of tech to record the ground motion?

  Seismometer
• a measure of the strength of earthquake?

  Richter scale
• an instrument to record the ground motion

  Seismograph
• What did the scientists find in the fault line in the Georgia Basin?

  A risk of tsunami
• Scientists believe that Yellowstone will erupt soon because of?

  Pressure of the magma beneath
• What type of signal does St. Helens give off?

  Earthquakes and Steam-venting
• How do Tsunami waves form?

  Underwater earthquakes.
• Yellowstone is in the middle of a plate rather than the edge.

  Hot spot
• Yellowstone would be classified as this category of volcano?

  Extinct
• What is gray eruption?

  trapped gases and heat can build up within the volcano releasing explosive
• Red eruption?

  effusive eruptions dominated by the classic red-glowing lava flow or lava lake
• Where do most earthquakes happen in the US?

  West Coast
• lots of magma in magma chamber means?

  Active
• Some magma under the solid rock?

  Dormant
• no magma left?

  extinct
• What is a Lahar?

  a lahar is a wet debris that is rich in ash-flow and moves within a slurry that is relatively fast.
• If the hot spot is not at the edge, then where?

  Middle of the plate
• The Galapagos volcanoes formed because they are at a plate edge
• The Canary and cape verde formed because they are at the hot spot
• More dense plate will?

  Sink under
• What kind of gas is released into the atmosphere?

  Carbon Dioxide
• What are the 3 advantages of volcanoes?

  Fertile soil, build lands, and hot spring
• Washington is at risk because of the? hint:plate in the Pacific

  ?

  Juan De Fuca
• HOw do we know the structure of the Earth?

  Seismic waves