What Can Be Said About Tectonic Activity on Ganymede

question 116

Multiple Choice

What can be said about tectonic activity on Ganymede?

• A) Active volcanoes give evidence of current tectonic activity.
• B) Young, lightly cratered terrain separating older more heavily cratered regions suggests tectonic activity in the past.
• C) An intrinsic magnetic field suggests current tectonic activity.
• D) Ganymede has a subsurface liquid ocean. This requires tectonic activity to provide the heat to keep the ocean from freezing.

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