Weathering of rocks, year 8 science, erosion,

1. Weathering of rocksConcept map

2. Grains of minerals Rocks are porous Rocks are non porous Close together Spaces in between Made from Very slow process – takes millions of years. Mechanical changes – including thermal changes , water and wind. How long? Rocks Chemicals – including acid rain. Breaking up is called Fossils of plants or animals Weathering Breaking up caused by Breaking up caused by Particles being transported away by water and wind That may have: Followed by: Sedimentary rocks Which results in: Erosion Deposited Particles move faster and further if: They become: To become Then they are: Due to: The particles are small Smaller and rounder Abrasion

3. Grains of minerals Rocks are porous Rocks are non porous Close together Spaces in between Made from Very slow process – takes millions of years. Mechanical changes – including thermal changes , water and wind. How long? Rocks Chemicals – including acid rain. Breaking up is called Fossils of plants or animals Weathering Breaking up caused by Breaking up caused by Particles being transported away by water and wind That may have: Followed by: Sedimentary rocks Which results in: Erosion Deposited Particles move faster and further if: They become: To become Then they are: Due to: The particles are small Smaller and rounder Abrasion