What two theories attempt to explain the earth’s magnetic field?

Which theory is the most scientifically valid?

Scientists measured Earthquake activity for a region that sits near the middle of one of the plates in the earth’s crust, and in another region that is very near a boundary of two plates. Which region will have the greatest earthquake activity?

The asthenosphere is composed of __________________

The earth’s magnetic field is generated in the earth’s _____________

__________ is a hypothetical supercontinent that might have existed in earth’s past.

People can ___________observe the atmosphere, hydrosphere, and crust.

_________________ rock is formed by molten rock solidifying.

Earthquakes can be caused by motion of rock masses along a _______________

The _____________discontinuity separates the mantle from the core.

The _____________discontinuity separates the crust from the mantle

The earth’s ____________ core is solid.

The boundary between a section of moving rock and section of stationary rock.

The point along a fault where an earthquake begins.

Rock formed when heat, pressure, and chemical reactions cement materials together.

A deposit of sand and mineral fragments, usually laid down by water.

If an earthquake measures 5 on the Richter scale and is followed by an aftershock that measures 3, how many times more energy was released in the original earthquake as compared to the aftershock?

A trembling or shaking of the earth as a result of rock masses suddenly moving along a fault.

Rock that behaves like something between a liquid and a solid.

The point on the surface of the earth directly above an earthquake’s focus.

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