Plate Tectonics
What are the 3 types of plate boundaries
-convergent
-divergent
-transform
Name 1 type of volcano
-sheild
-cinder cones
-composite
How old is the earth?
-4 billion years old
What happens ate each of the 3 plate boundaries
Convergent- collide
Divergent- spread apart
Transform- slide past each other
What is the most common volcano
-cinder cone
What are 3 layers of the earth?
-crust
-mantle
-inner or outer core
What plate boundary’s are volcanoes MOST common at
-convergent
-divergent
Which type of volcano forms large, broad volcanoes
-sheild
Who are paleontologists?
-scientists who use evidence from rocks and fossils, to know what occurred in the history of life
How do volcanoes form at divergent plates
-when they pull apart, the lithosphere thins and magma erupts, forming new lithosphere from cooled lava
What is a composite volcanoe also known as
-stratavolcanoes
What is the “Ring of Fire”
-it is a name for where the world’s most active volcanoes are located around the edges of the Pacific Ocean
What are sheild volcanoes
-large and broad volcanoes, that release fast moving lava and are less explosive eruptions