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This is the theory that continents once formed a single land mass, broke up and drifted to their current positions
What is Continental Drift?
This is the name of the single landmass that broke apart and became the Earth's continents
What is Pangea?
This person developed the theory of Continental Drift
Who is Alfred Wegner?
This is a boundary where two plates are moving away from each other
What is a divergent boundary?
These are the sections of the Earth's upper layer that move around the mantle
What are tectonic plates?
The undersea mountain chain where a new ocean floor is produced. (divergent ocean plate boundary)
What is a mid-ocean ridge?
This person proposed the "Seafloor Spreading" theory
Who is Harry Hess?
This is a place where two tectonic plates meet
What is a plate boundary?
The direction that boundaries move in a convergent boundary
What is toward each other?
The direction that boundaries move in a transform boundary?
What is horizontally past each other?
Type of geologic feature you would find at a convergent collision boundary
What are mountains?
This is the type of geologic feature you would find at a transform boundary
What is an earthquake?
This is a deep valley where two continental plates move apart
What is a rift valley?
The type of geologic features would you find at a divergent boundary
What are ridges and rift valleys?
These are three pieces of evidence that support the theory of Continental Drift
What are:
1. Continents fit together like puzzle pieces- South America and Africa fit together almost perfectly?
2. Similar plant fossils on separate continents- Early Glossopteris Flora fossils found on all continents?
3. Similar animal fossils on different continents- Mesosaurus on South America and Africa?
This is the idea that the Earth's upper layer is broken into sections called plates that move around the mantle
What is the Theory of Plate Tectonics?
This is a technique that uses sound rays, usually under water to navigate, communicate, or to map the ocean floor
What is Sonar?
This is a break in the Earth's crust where slabs of rock slip past each other
What is a fault?
The geologic features you would find at a convergent boundary (ocean-continent)
What are trenches and subduction volcanoes?
True or False- the Atlantic Ocean is getting bigger and the Pacific Ocean is shrinking
What is true?
The type of geologic features you would find a a convergent boundary (ocean-ocean)
The process by which molten material adds new oceanic crust to the ocean floor. The sea floor spreads along both sides of the mid-ocean ridge as new crust is added
What us seafloor spreading?
The direction that boundaries move in a divergent boundary
What is away from each other?
This is formed when forces continue to stretch land on either side of a rift valley, and the area widens and fills with water to become a narrow sea?
Subduction causes slabs of oceanic crust to sink through a deep-ocean trench into the mantle. The crust melts and forms magma, which then rises back to the surface. When the magma from the melted crust erupts as lava, these are formed
What are subduction volcanoes?