Weathering and Rocks Revision Crossword Puzzle
QUESTIONS LIST: granite : a rock prone to hydrolysis due to the presence of feldspar, carbonation : caco3 reacts with acid water and forms calcium bicarbonate which is soluble and removed in solution, oxidation : iron compounds react with oxygen to produce a reddish brown coating, limestone : a rock composed of caco3 which is susceptible to carbonation, tor : an isolated mass of rock, often granite, left standing on a hilltop after the surrounding rock has been broken down and removed, humic acids : acids which are derived from the decomposition of vegetation and help to weather rocks. (2), regolith : unconsolidated material found on the earth's surface including soil, scree, weathered bedrock and deposited material, grikes : the large joints in limestone which are widened by weathering on limestone pavements, peltier : diagram which shows how weathering is related to moisture availability and average annual temperature, salt : decomposition of rock by solutions of salt. if temps are between 26-28 degrees c, na2so4 and na2co3 expand by 300% (..........?crystallisation), hydration : when certain minerals absorb water, expand and change. shale and mudstone increase in volume by 100% when the clay minerals absorb h2o, aspect : the direction a slope faces, granular : different minerals in rocks expand and contract at different temperatures which leads to weathering. (...............?disintegration)), freeze thaw : also called frost shattering - when water in joints freezes and expands by about 10% (2)