Learn how the processes of weathering and erosion sculpt Earth's landscapes. Material processes - Classifying materials - Soil Learning Points Weathering is the breaking down of rock into smaller particles. Erosion is the removal of rock and soil particles produced by weathering. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.