Geology Chapter 3.1 0.0 / 5 ? Geologyformation of sediment ASOCR Created by: abbbywCreated on: 28-12-17 13:41 36547128 Across 1. the in situ chemical alteration + mechanical + biological breakdown of rocks by exposure to the atmosphere, water + organic matter (10) 6. caused by the expansion of freezing water in fractures, which forces rocks apart (5, 10) 7. occurs when sheets of rock split off due to differential expansion + contraction of minerals, during diurnal heating + cooling (11) 8. caused by the expansion + fracturing of rock due to the removal of overlying rock (8, 7) Down 2. the reaction between minerals + water, causing the minerals to decompose (10) 3. the reaction between carbonic acid + minerals (11) 4. causes the mechanical + chemical weathering of rocks by the wedging action of plant roots (4, 6) 5. by invertebrate + vertebrate animals mixes + brings rock + soil particles to the surface. This facilitates weathering at greater depth, by providing access for atmospheric gases + water (9)
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