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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 __________________ & ______________________.
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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 _______________________