Earthquakes
What causes most Earthquakes?
Rocks under the Earths surface move together suddenly
What is the name for melted rock that is beneath the earths surface?
Magma
Up to how fast can tsunami waves travel?
500 miles per hour (jet plane)
Animals can sometimes sense which of the 3 natural disasters?
Earthquakes
What is the name of the area that 90% of Earthquakes happen?
The Ring of Fire
What is the name of the type of volcano that is currently inactive but could erupt again?
Dormant
How can you tell a tsunami is about to come?
The waves will pull back from the sand
Which ocean is surrounded by the Ring of Fire?
Pacific Ocean
About how many earthquakes happen each year?
About 500,000
What causes volcanoes to form?
Movement in the tectonic plates
Where do tsunamis usually occur?
Coastal areas (around the beach)
People will receive a warning of a tsunami if the wave is over how many meters?
+1/+3 meters
True or false: The majority of earthquakes that happen are too small to feel
True
What type of volcano has no more magma and will never erupt again?
Extinct Volcano
What usually causes tsunamis?
Underwater earthquake or volcanic eruption
Earthquakes and volcanoes cause what natural disaster?
Tsunamis
What do we call the point underground where the earthquake starts?
The focus or hypocenter
What does VEI stand for in relation to volcanoes?
Volcano Explosivity Index
What usually happens when tsunamis reach the shore?
They slow down in speed but grow in height
What are the 3 things that usually come out of volcanoes?
Lava, ash, and gas