I need the River Erosion Gizmo Student Exploration answer key to review my answers!

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

answerblank(1); afferent neurons; blank(2); efferent neurons;