Heat Transfer
This process transfers heat energy through molecular collisions without the bulk movement of material.
What is conduction?
This is the primary reason oceanic crust subducts beneath continental crust.
What is "it is more dense"?
This nuclear process occurs at a constant, spontaneous rate and is used as a "geologic clock."
What is radioactive decay?
This specific layer of the mantle has the property of plasticity and contains convection currents.
What is the asthenosphere?
This process, occurring at mid-ocean ridges, is evidenced by magnetic patterns on the ocean floor.
What is seafloor spreading?
This method of heat transfer involves the movement of heated fluids, such as liquids or gases.
What is convection?
This term describes the combination of the crust and the rigid uppermost part of the mantle.
What is the lithosphere?
If a sample originally had 100g of an isotope and now has 25g, this many half-lives have passed.
What is two?
These two physical properties of the Earth's interior both increase as depth increases.
What are temperature and density?
This occurs when the more dense oceanic crust sinks beneath the less dense continental crust during a collision.
What is subduction?
It is the specific process where less dense, warm air rises while more dense, cool air sinks.
What is convection?
Most earthquakes and volcanoes are located in these specific geographic areas.
What are plate boundaries?
If a material has a half-life of 10 days, this percentage remains after 30 days
What is 12.5%?
Compared to the continental crust, this type of crust is more dense and more mafic (basaltic).
What is oceanic crust?
This is the specific location where the youngest oceanic bedrock is most likely to be found.
What is a mid-ocean ridge?
This happens to the density of a mass of air as its temperature increases.
What is "it decreases"?
This is the zone formed when an oceanic plate converges with a continental plate, usually creating a trench.
What is a subduction zone?
This is the approximate half-life of Uranium-238.
What is 4.5 billion years?
Unlike the liquid outer core, this deepest layer of the Earth is composed of solid material.
What is the inner core?
At this type of plate boundary, crust is neither created nor destroyed
What is a transform boundary?
This occurs primarily because molecules at the hot end of an object vibrate and collide with neighboring molecules.
What is conduction?
New oceanic crust is formed at divergent boundaries by this specific process
What is the upwelling of magma?
This isotope has the longest half-life according to the Earth Science Reference Tables.
What is Samarium-147?
This term refers to the portion of the mantle below the asthenosphere and above the outer core.
What is the mesosphere?
Most earthquakes and volcanoes are found along the edges of these geographic features.
What are tectonic plate boundaries?