Day 19 in SCI110: Water Quality, Rock Cycle
- Spring 2005 Schedule
- Last time:
- Today:
- Sorry: the exams aren't graded yet.
- Hour 1: Water quality presentation preparation
- Hour 2: Water quality presentation presentations
- Hour 3: The rock cycle
- Tim and Moby on
- Minerals
- Naturally occurring
- inorganic solid element or compound
- crystalline structure
- Examples: salt, quartz, "native elements" (e.g. gold)
- Classified into silicates versus non-silicates
(Table 14.1, p. 278)
- Three types of rock (aggregations of one or more
minerals):
- igneous (from Latin ignis, meaning fire)
- Extruded from magma
- Examples: granite, obsidian, pumice
- sedimentary
- made up of fragments of other rocks
- show layers of deposition
- sedimentary rocks may contain fossils
- Examples: sandstone, limestone
- metamorphic - "after - form"
- sedimentary or igneous rocks that
have been altered by heat and/or
pressure
- "foliations" (bands in the rock) may
appear to be layers of
deposition - watch out!
- See Figure 14.12
- Examples: slate, marble
- Rock identification (p. 52, using some rock resources):
- Homework:
- Read
- Chp. 17: 353-361 (water), and
- Chp. 14: 276-282 (rocks)
- Questions for Thought to answer next time: p. 372, 4-6
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