Basics
What page in the reference table has the map of tectonic plates
12
Plates colliding
Convergent
What is a mantle plume
large section of heated magma rising from the core up to the crust
Why does earth have a magnetic field?
it is caused by the liquid, iron outer core
What tectonic plate is NY a part of?
North American Plate
What ESSRT page has Earth's interior model?
11
Plates dividing
Divergent
Does a hot spot move
no, they are stationary
how is Earth's polarity recorded
Iron in liquid magma/lava aligns with Earth's magnetic field and remains in that alignment when the lava solidifies.
What are the three main types of plate boundaries
Divergent, Convergent and transform
Who first discovered plate tectonics
Alfred Wegener
Plates sliding parallel to each other
Transform
Why does a hot spot create a chain of islands
Because the tectonic plate above the hot spot is moving
What pattern is created in rocks in the oceanic crust
it is a mirror image or reflection
What causes tectonic plates to move?
Mantle convection
What layer of Earth do the tectonic plates make up?
Lithosphere
What forms on a continent during plate convergence?
Mountains and volcanoes
How does the age of the island relate to its distance from the hotspot?
The further an island is from the hot spot, the older it is.
What is seafloor spreading
divergent tectonic plates on either side of a mid ocean ridge, moving apart and new rock forming at the center
What type of boundary is California on?
Transform
What is the theory of plate tectonics?
The Earth's outer crust is divided into several plates that glide over the plastic-like and less rigid upper mantle.
What forms on the surface at a divergent plate boundary?
Rift/ridge
Why are the older islands smaller than the younger islands
Because erosion makes the islands smaller over time
Why does the ocean floor show reversed magnetism during parts of Earths history
Because Earth's polarity reverses roughly every 100 thousand years.
Why do volcanoes form above subducting plates
The subducting plate melts as it reaches the got upper mantle. The melted materials rises and comes to the surface creating a volcano.