Day 20 in SCI110: Water cycle; Rock density; plate tectonics
- Spring 2005 Schedule
- Last time:
- Water quality presentation preparation
- Water quality presentation presentations
- The rock cycle
- Minerals
- Naturally occurring
- inorganic solid element or compound
- crystalline structure
- Examples: salt, quartz, "native elelments" (e.g. gold)
- Three types of rock (aggregations of one or more
minerals):
- igneous (from Latin ignis, meaning fire)
- sedimentary
- metamorphic - "after - form"
- Rock identification (p. 52, using some rock resources):
- Today:
- No field trip! The Licking was (is?) too high and dangerous....
- Return and discuss the exams
- Rock identification - how did we do?
- Rock density experiment
- Hydrologic cycle
- Tim and Moby
- ocean/evaporation/runoff
- evaporation would cover the earth 85cm deep per year
- Freshwater (3%)
- surface water
- must be filtered
- susceptible to bacterial and inorganic
contamination
- watersheds
- groundwater (25 times surface)
- naturally filtered
- less susceptible to bacterial
contamination
- stored in aquifers - see p. 358
- water table
- divides saturated/unsaturated zone
- How can we foul things up?
- Salt water (97%): How can we foul things up?
- Questions for Thought: p. 372, 4-6
- Plate tectonics
- Homework:
- Read
- Chp. 14: 282-293 (plate tectonics)
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