Lesson 1.1 - 1.4 Flashcards
Earth is compared to a grape that contracted into a raisin due to the cooling process.
Raisin Theory
When did the Big Bang happened?
about 13.77 billion years ago
Caused contraction and pressure that allowed some parts of the crust to rise, while others buckled downward.
The cooling process
Who proposed the term “Isostasy” in 1889?
Clarence Edward Dutton
Equilibrium exists on the Earth’s surface, equal mass
Isostasy
equal mass, equal volume
Isostasy
the term tectonic is derived from the Greek word? Which means?
Tekton
Carpenter or builder
Tectonic plates are also known as?
Lithospheric plates
Are massive slabs of solid rock that surrounds the earth’s surface
Tectonic plates or lithospheric plates
Earth’s crust consists of several large interlocking plates that move in different directions and velocities.
Tectonic plate theory
large continental mass must be composed of lighter materials
Isostasy
plates that move around by floating on top of the mantle
tectonic plates
According to tectonic plate theory…?
the earth’s outermost layer is divided into a dozen or more large and small slabs known as lithospheric plates.
Rocky outer part of the earth made up of a brittle crust and the top part of the upper mantle
lithosphere
The denser and weaker layer beneath the lithosphere mantle.
Asthenosphere
Much hotter and fluid than the lithosphere
asthenosphere
Magma chamber, extreme hot and pressure
asthenosphere
Causes the movement in the asthenosphere
convection current