The Presence of a Mercurian Magnetic Field Surprised the Planetary

question 79

Multiple Choice

The presence of a Mercurian magnetic field surprised the planetary scientists on the Mariner10 team because:

• A)Mercury is low in iron.
• B)Mercury spins too rapidly to produce a stable dynamo.
• C)It's still too hot for its core to have differentiated.
• D)The dynamo theory predicted that Mercury was spinning too slowly for one.
• E)Mercury lacks an iron core.

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