Topics discussed include sedimentary rocks, igneous rocks, metamorphic rocks, weathering, erosion, glaciers, rivers, and modifying farm land.
(Topics; discussed; ) (Topics discussed; include; sedimentary rocks, igneous rocks, metamorphic rocks, weathering, erosion, glaciers, rivers, and modifying farm land)
Topics Topics discussed
discussed include
sedimentary rocks, igneous rocks, metamorphic rocks, weathering, erosion, glaciers, rivers, and modifying farm land