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Name _________________________________ Weathering PowerPoint Notes 1. _________________ is the breaking up of rock into smaller pieces or ___________. 2. The two processes that work together to decompose or break down rocks are _______________________ & _____________________ weathering. 3. ___________________ weathering or decomposition, takes place when at least some of the rocks minerals are changed into different substances. 4. Chemical processes that break down rocks include ____________ rain, acid-excreting _________________, and __________________. 5. The main agent of chemical weathering is ____________________. 6. _________________ climates have lots of chemical weathering because there is lots of ____________________ and _____________ temperatures. 7. Oxidation, or rusting, is common in rocks with the element ______________. 8. ___________________ weathering involves physically changing the rocks without a change in the chemical make-up of the rock. 9. ____________ _____________ is the freezing and thawing of water in cracks. 10. Mechanical ____________________ is the peeling of rock in sheets as they expand. 11. Plant roots must be ________________, and therefore can grow into rock cracks and cause fractures. 12. ______________________ is the pattern of weather over many years in an area. 13. Chemical weathering is rapid where there is lots of _____________________ & warm ____________________________ 14. Mechanical Weathering is rapid in areas where ___________________ & _____________________ take place. 15. If particles that have been weathered start to move, then it’s _________________. 16. Erosion involves __________________ & ______________________. Identify the following as Weathering, Erosion, or both 1. Waves that are crashing on a sand beach __________________________ 2. Water expands as it freezes in the cracks of rocks _____________________ 3. Pebbles move down a stream with the current _______________________ 4. Acid rain causes the decomposition of a statue in New York ___________________ 5. A man shovels dirt to plant a tree ______________________ 6. A glacier slowly moves down a mountain ______________________ 7. A tree’s roots grow into the cracks of rocks _______________________ 8. A major volcano erupts ______________________ 9. A shovel is left outside and begins to rust _______________________