Looking through Earth inside Flashcards
2 ways to classify the layers of Earth
- Material or chemical composition
- Mechanical characteristics
3 compositional layers of Earth
- crust
- mantle
- core
Scientists associate the mantle’s material to be similar to that of an ultramafic rock called __________, which is made of iron and magnetism.
peridotite
The core is made up of _______ and _____________.
iron, nickel alloy
The mantle extends to about _______ km thick and has a mass of ______________ kg.
2,900
4.01 x 10^24
5 mechanical layers of earth
- lithosphere
- asthenosphere
- mesosphere
- outer core
- inner core
The core makes up of ___% of earth’s composition.
31
A region of partially molten mantle materials that can flow.
Asthenosphere
The quick change in seismic velocities in a boundary.
Seismic discontinuity
The boundary between the crust and the mantle.
Mohorovicic discontinuity or Moho
The boundary between the inner and outer core.
Lehmann discontinuity
The boundary at which the mantle meets the core.
Gutenberg discontinuity
Her discovery is a breakthrough in the study of Earth’s interior. Who is she?
Inge Lehmann
The source of our planet’s internal heat.
core
The lithosphere won’t break under pressure and mechanical interaction. True or False?
False. It has a tendency to break under pressure and mechanical interaction, which is responsible for earthquakes.
