Attrition - rocks smashing into each other and breaking down becoming smaller and smoother
Abrasion - rocks that are in the river wearing down the banks and river bed
Solution - soluble particles dissolving
Hydraulic Action - when there are cracks in the banks / cliffs, water can push air into them which creates pressure causing the cracks to get bigger
Hope this is what you wanted and I hope it helps. :)
False. There are other gasses such as nitrogen in the atmosphere.
Answer:
The crop failures were caused by late blight, a disease that destroys both the leaves and the edible roots, or tubers, of the potato plant. The causative agent of late blight is the water mold Phytophthora infestans. The Irish famine was the worst to occur in Europe in the 19th century.
