Here are the key points from the activities: - Finches on different islands evolved different beak sizes/shapes suited to food sources - In drought years, larger beaked finches survived better as they could crack larger seeds - In wet years, smaller beaked finches thrived as they could access more nectar/smaller seeds - Over generations, natural selection led to different finch populations on different islands The gizmo showed how beak characteristics changed with rainfall amounts. It demonstrated evolution through natural selection based on environmental pressures like food/water availability. Let me know if any part needs more explanation!