What are 3 facts about the outer core?
The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances. The outer core is responsible for Earth’s magnetic field. As Earth spins on its axis, the iron inside the liquid outer core moves around.
Why is the outer core liquid?
Because of its high temperature, modeling work has shown that the outer core is a low-viscosity fluid that convects turbulently. The outer core is not under enough pressure to be solid, so it is liquid even though it has a composition similar to the inner core. Sulfur and oxygen could be present in the outer core.
How do we know the Earth’s outer core is liquid?
More detailed knowledge of the structure of the Earths interior comes from observations of seismic waves. Scientists figured out that the outer core must be liquid because S waves do not pass through it, but P waves do. The behavior of P and S waves also indicates that the inner core is solid.
What would Earth lack if Earth didn’t have a liquid outer core?
What would Earth lack if Earth didn’t have a liquid outer core? Earth would lack its magnetic field if Earth didn’t have a liquid outer core.
What are the layers of earth from coolest to hottest?
The Earth’s layers from coolest to hottest are: crust, mantle, outer core, and inner core.
What type of geoscientist interprets data from certain instruments to help detect earthquakes and identify faults?
In the passage this question is provided for, you should be able to locate the fallowing text: “Seismologists interpret data from seismographs and other instruments to help detect earthquakes, along with identifying fault lines.”
Which layer of Earth acts as a very effective insulator because it’s made of rock?
mantle
Does the crust act like an insulator?
Earth’s solid crust acts as a heat insulator for the hot interior of the planet. Magma is the molten rock below the crust, in the mantle. Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents.
What makes the lithosphere and crust move?
The lithosphere is divided into huge slabs called tectonic plates. The heat from the mantle makes the rocks at the bottom of lithosphere slightly soft. This causes the plates to move. The movement of these plates is known as plate tectonics.
What happens to crust as plates move apart?
A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust. When two plates come together, it is known as a convergent boundary.