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This knowledge is based on the behavior of seismic waves, particularly the behavior of P-waves and S-waves. S-waves are unable to travel through liquids, and this particular wave trait indicates a boundary between the solid mantle and the liquid outer core. As S-Waves do not propagate through the outer core a "shadow" zone is created on the other side of the earth from the source of seismic waves. In this zone no S-waves are detected. The boundary between the inner core and outer core is also detected by a difference in velocities of P-waves. The Earth's magnetic field also originates in the liquid outer core by the movement and currents of molten metal in this layer.
What else can I help you with?
Molten rock that reaches the earths surface is called?
Molten rock that reaches the Earth's surface is called lava.
Molten rocks that cool at the earths surface are known as?
Lava.
What is the complete predicate in volcanoes are places on the earths surface where molten rock gases and ash from deep inside the earth are ejected?
"are places on the earth's surface where molten rock, gases, and ash from deep inside the earth are ejected."
What do you call Molten rock within earths surface?
Lava
Is there a hidden land in the center of the earth?
There is no scientific evidence to support the existence of a hidden land in the center of the Earth. The Earth's core is composed of molten iron and nickel, making it impossible for a habitable landmass to exist there.
What is earths magnetic field called?
It is Earths' "Magnetosphere".
Molten rock that reaches the earths surface is called?
Molten rock that reaches the Earth's surface is called lava.
Why is iron the earths most abundant element?
It makes up the majority of the molten core of the earth.
Is earth's magnetism related to the circulation of molten material within Earths core?
TRUE (this is the correct answer)
Where does the convection that causes earths magnetic field?
The convection that causes Earth's magnetic field happens in Earth's molten outer core.
Which layer of earth is the source of molten rock called magma that sometimes rises to earths surface?
the mantle
Molten rocks that cool at the earths surface are known as?
Lava.
Where does the earths magnetic field originated from?
The Earth's magnetic field is generated by the the Earth's spin and the fact that it has molten iron in its core. When convecting molten metals spin they generate electric currents and with these a magnetic field.
Which of Earths spheres do each of the five branches of Earth Science study?
Which of these spheres do each of the five branches of earth science study?
What is the area of earth science that examines the physical and biology changes that have occurred in earths past called?
The area of earth science that examines the physical and biological changes that have occurred in Earth's past is called paleontology. This field focuses on studying fossils and other evidence to understand the history of life on Earth and how it has evolved over time.
What are some forces that act on the earths plate?
The only forces that act on the earth's plates are the Sun, the Moon and the molten inner core of the earth itself.
What is the material at earths surface called?
Molten rock material on Earth's surface is called lava. When under Earth's surface it's called magma
