Layers of the Earth
What is the definition of Earth’s Crust?
“the thin and solid outermost layer of the Earth above the mantle”
Who is Alfred Wegener?
The inventor of the theory of Pangea and Continental Drift.
What is the definition of Tectonic Plates?
“the hypothesis that states that the continents once formed a single landmass, broke up,
and drifted to their present locations”
What is the definition of the Earth’s Mantle?
“ The layer of the Earth between the crust and the core”
When you spin the globe two times it represents
What is 48 hours
What are some physical characteristics of the crust?
The thinnest layer of the earth is solid and made of rock .
What is Pangaea?
Pangaea is the name of the landmass that Wegener believed to be all of the continents joined together millions of years ago.
What is Convection?
It is the cause of the oceanic lithosphere moving sideways and away from the mid-ocean ridge.
What are some physical characteristics of the mantle?
It is mostly solid rock, but less viscous at tectonic plate boundaries and mantle plumes
The Earth rotates on its
what is axis
What is Oceanic Crust?
thin part of the earth's crust which underlies the ocean basins.
What is Sea-Floor spreading?
“the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies”
Explain what happens at a Divergent boundary.
At a divergent boundary, two plates are moving away from each other. The pulling away creates tension and they break apart, with magma filling the gap. A common example is mid-ocean ridges.
s the definition of the Earth’s Core?
“the central part of the Earth below the mantle”
What are the planet from smallest to largest
Mercury, Mars, Venus, Earth, Neptune, Uranous, Saturn, Jupiter
What is Continental Crust?
the outermost layer of Earth's lithosphere that makes up the planet's continents and continental shelves
What are the three types of plate boundaries?
Convergent, Divergent, and Transform.
Explain what happens at a Convergent boundary.
A convergent boundary is where two plates moving at different speeds collide. Sometimes this results in both plates folding up and mountains forming and sometimes one plate slips under another, causing a subduction zone.
What is the Listhosphere?
Crust and Upper Mantle make up the lithosphere.
My Very Earthly Mother Just Served Us Nachos mimic stands for what
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
What is the composition of the earth’s Inner Core vs the Outer Core?
The core inner is made almost entirely of metal were as the outer core is made mostly of liquid iron and nickel And is about 1,367 miles thick,
What were the four major types of evidence that he used to propose the idea of Continental Drift?
Fossils of the same animals being on different continents, puzzle piece shapes, the same rock layers being on different continents, and mountains fitting together.
Explain what happens at a Transform boundary.
At a transform boundary, two plates slip past each other horizontally. They move at different speeds and sometimes move in different directions causing grinding and jerking that can cause earthquakes.
What is the athensosphere
Lower mantle that has the magma.
Is the Earth always titled in the same way
The Earth is always tiled in the same way.