Plate Techtonics Flashcards
San Francisco has frequent earthquakes because it is built on a
___________ ____________
Fault line
A tsunami is a huge ocean _________ caused by the movement of earths crust
Wave
What fault line is located in California?
San Andreas
An earthquake is the _____________ of the ground.
Shaking
The flowing of the upper _______ causes the Earths’ plate to move
Mantle
A ______________ is a mountain formed at the opening in the crust where molten rock, hot gases, and ash erupt
Volcano
The earths crust is the thickest under the _____________
Continental plate
The earths crust is the thinnest under the __________________
Ocean plates
What landforms are shaped by water?
Valleys, Canyons
What landforms are shaped by wind?
Beaches and Sand dunes.
What is the flattest kind of landforms without any hills or mountains?
Plains
The tallest and most visible landforms are
Mountains
Streams and rivers can cut small _________ or gullies where they flow
Channels
Gust of wind can pile into large mounds called sand ___________.
Dunes
_________________ measures vibrations in the Earth
Seismograph
What landform is formed when the river meets the ocean?
Delta
The __________ is the top layer of the earth.
Crust
A large landmass surrounded by ocean or other land is called _____________________.
Peninsula
Valleys and canyons are examples of landforms shaped by
Water
The gentle sloping edge of a continent that connects the shore to the sea is called
Continental shelf
What layer has a magnetic field?
Outer core
What earth layer is made of solid metal?
Inner core
What type of boundary is an area where two tectonic plates are moving apart?
Divergent boundary
What is solid rock cost to liquefy by extreme heat and pressure?
Magma
Molten rock that reaches the earth surface for a volcano where other opening is called _____________
Lava
What type of boundary is an area for two tectonic plates are colliding?
Convergent boundary
There are blank ___________ types of different volcanoes
Three
What type of volcano is most destructive?
Stratovolcano
The ring of _________ is a zone of high earthquake and volcanic activity and encircling the Pacific Ocean.
Fire
Mount Saint ________ in the state of Washington is part of the ring of fire
Helens
How many volcanoes are active?
1500 volcanoes
How many earthquakes take place each year worldwide?
About 500,000
An active hotspot created the _____________ volcanoes
Hawaiian
The continents today word once joined in one huge continent called _____________
Pangea
The continents only drift a few __________ a year
Inches
Name the four earth layers
Inner core, outer core, mantle, and crust
What earth layer is solid rock?
Mantle
What type of volcano is also known as a stratovolcano?
Composite
What two metals make up the inner core?
Nickel and iron
What part of the ocean floor do you find mountains deep trenches and undersea volcanoes?
Ocean ridges
Mount Saint Helens is an example of what kind of volcano?
Stratovolcano
