sometimes violent movement of the earth, produced when tectonic plates grind or slip past each other at a fault
What is an earthquake?
100
molten rock material formed when solid rock in the earth's mantle or crust melts
What is magma?
100
a giant ocean wave, caused by an underwater earthquake or volcanic eruption, with great destructive power
What is tsunami?
100
America's first female astronaut
Who is Sally Ride?
100
8 tectonic plates meet in this zone
What is the Ring of Fire?
200
point on the earth's surface that corresponds to the location in the earth where an earthquake begins
What is epicenter?
200
a way to measure information collected by seismographs to determine the relative strength of an earthquake
What is Richter scale?
200
a natural event, formed when magma, gases, and water from the lower part of the crust or mantle collect in underground chambers and eventually erupt and pour out of cracks in the earth's surface
What is volcano?
200
study the movement of the plates and the changes they cause in order to understand how the earth is continually being reshaped--and how earthquakes and volcanoes occur.
Who are geographers?
200
often creates hills and mountains
What is lava?
300
fracture in the earth's crust
What is fault?
300
chain of volcanoes that lines the Pacific Rim
What is Ring of Fire?
300
smaller magnitude quakes
What are aftershocks?
400
a device that measures the size of the waves created by an earthquake
What is seismograph?
400
fracture in the earth's crust
What is fault?
400
a geyser in Yellowstone
What is Old Faithful?
400
Ocean where the Ring of Fire is found
What is the Pacific Ocean?
500
magma that has reached the earth's surface
What is lava?
500
an enormous moving shelf that forms the earth's crust
What is tectonic plate?
500
hot spring that occasionally erupts with steam jets and boiling water
What is a geyser?
500
results in collapsed buildings, landslides, and displacement of land