Sphere + Plane = ???

Teachers and Students:
If you'd like to complete the activity below in augmented reality in GeoGebra 3D Calculator on your phone or tablet, [b][url=https://www.geogebra.org/3d/brhwztqb]open this link on your device[/url][/b]. [br][br]Otherwise, complete your construction in the app below.
In this app, create a sphere and plane that intersect.
Use the INTERSECT 2 SURFACES tool [icon]/images/ggb/toolbar/mode_intersectioncurve.png[/icon] to create the intersection of this sphere and plane. The press the MOVE tool [icon]/images/ggb/toolbar/mode_move.png[/icon]. Move the point of the plane and sphere around. What does this intersection look like?
Use the remaining tools in the toolbar to show your answer to the question above is correct. How do you know you are correct?
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Information: Sphere + Plane = ???