How often does Earth's magnetic field change direction? A. About every one million years B. About every two million years C. About every four millions years D. About every three million years
Question
Updated 4/22/2020 11:10:01 AM
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Original conversation
User: How often does Earth's magnetic field change direction? A. About every one million years B. About every two million years C. About every four millions years D. About every three million years

Weegy: The study of magnetic field of the Earth is known as paleomagnetism.
|Score .6505|selymi|Points 23305|

User: The magnitude of an earthquake is typically calculated according to the _______ scale. A. Mercalli B. Richter C. Saffir-Simpson D. Fujita

Question
Updated 4/22/2020 11:10:01 AM
Rating
8
The magnitude of an earthquake is typically calculated according to the Richter scale.

Questions asked by the same visitor
Which type of volcano is formed from alternating layers of lava and ash? A. Composite volcano B. Hot spot volcano C. Shield volcano D. Fissure
Weegy: Composite volcano is formed from alternating layers of lava and ash. (More)
Question
What term refers to the point below the surface where an earthquake begins? A. Seismogenic zone B. Seismic zone C. Epicenter D. Hypocenter
Question
Updated 7/9/2019 6:27:19 PM
Hypocenter refers to the point below the surface where an earthquake begins.
Confirmed by yumdrea [7/9/2019 7:12:41 PM]
What is typically responsible for forming volcanic island chains in the oceans? A. Composite volcanoes B. Shield volcanoes C. Fissures D. Hot spot volcanism
Question
Updated 7/9/2019 6:28:57 PM
Hot spot volcanism is typically responsible for forming volcanic island chains in the oceans.
In which layer does mantle convection occur? A. Asthenosphere B. Lithosphere C. Inner core D. Crust
Question
Updated 3/13/2020 1:35:36 PM
Mantle convection occurs in the Asthenosphere.

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