Plate Tectonics
What are the 3 types of plate boundaries?
Divergent, Convergent, and Transform
What is the outermost layer of the Earth?
Crust
What is the first stage in the life cycle of a star?
nebula
The hottest stars are what color? The coolest stars are what color?
Hottest: blue
Coolest: red
Who proposed the continental drift theory?
Alfred Wegener
Describe subduction
the process in which a dense plate sinks under a less dense plate and melts into the Earth's mantle.
What is the innermost layer of the Earth?
Core
What is a 'babystar' called?
protostar
The sun is considered an
average size star
Who proposed the theory of seafloor spreading?
Harry Hess
Describe the plate movements at each type of boundary
Convergent: Plates collide with each other
Divergent: Plates move away from each other
Transform: Plates slide past each other in opposite directions
Put these in order from innermost layer to outermost layer:
mantle, core, asthenosphere, crust, lithosphere
Core, mantle, asthenosphere, lithosphere, crust
What is located on the horizontal and vertical axis on an HR diagram?
Horizontal: temperature/ spectral class
Vertical: magnitude/ luminosity (brightness)
Fossils, geological features, coastal outlines that fit like puzzle pieces
What causes plate movement?
Convection currents
What is the lithosphere?
What is found in the lithosphere?
Crust and top part of the mantle
Tectonic plates are found here
Name 3 types of stars
Ex: red giants, blue giants, supergiants, white dwarfs, main sequence
Most stars are classified as what type of star?
Main sequence stars
What was Alfred Wegener's theory?
"Pangaea"
Name one type of land formation found at each type of boundary
Convergent: mountains, volcanoes, ocean trenches, subduction zones
Divergent: mid ocean ridge, rift valley
Transform: earthquakes, faults
What is the asthenosphere? And what is found in the asthenosphere?
The upper layer of the Earth's mantle below the lithosphere. Convection currents are found here.
Stars are classified by 3 things, what are they?
temperature, composition, luminosity (brightness)
Name two types of stars that are found on the HR diagram?
Ex: blue giants, red giants, red super giants, main sequence, white dwarfs
Describe what superposition is
sedimentary rock in which the oldest layer is at the bottom and the youngest layer is at the top