|
Specific Ideas
|
- The idea of systems provides a framework in which
students can investigate the four major interacting
components of the earth system - geosphere, hydrosphere,
atmospshere, and biosphere. In the holistic approach to
studying the planet, physical, chemical, and biological
processes act within and among the four components on a
wide range of time scales to change con tinually earth's
crust, oceans, atmopshere, and living systems. NSES pgs.
158-159
- The cycling of water in an out of the atmosphere
[includes]
falling again to the surface,
where it colelxcts in rivers, lakes, and porous layers of
rock. SFAA p. 43
- Water is a solvent. As it passes through the water
cycle it dissolves minerals and gases and carries them to
the oceans. NSES p. 160 D1g.
- The cycling of water in and out of the atmosphere
plays an important role in determining climatic patterns.
Water evaporates from the surface of the earth, rises and
cools, condenses into rain or snow, and falls again to
the surface. The water falling on land collects in rivers
and lakes, soil, and porous layers of rock, and much of
it flows back into the ocean. Benchmark 4B7
- Fresh water, limited in supply, is essential for life
and also for most industrial processes. Rivers, lakes,
and groundwater can be depleted or polluted, becoming
unavailable or unsuitable for life. Benchmarks 4B8
- This ground water, which is a major source [of
fresh water] for many people, takes a long time to
accumulate in the quantities now being used. In some
places it is being depleted at a very rapid rate. SFAA p.
44
- The benefits of the earth's resources--such as fresh
water, air, soil, and trees--can be reduced by using them
wastefully or by deliberately or inadvertently destroying
them. The atmosphere and the oceans have a limited
capacity to absorb wastes and recycle materials
naturally. Cleaning up polluted air, water, or soil or
restoring depleted soil, forests, or fishing grounds can
be very difficult and costly. Benchmarks 4B11
|
|
Developmental & Instructional
Implications
|
This indicator is a good opportunity for a lab-based
assessment, in which students demonstrate the
factors.
[Regarding the dissolving of sugar in water] the
majority of students in a sample of 500 between the ages of
5 and 17 depicted bits of sugar without drawing the water.
Driver p. 101
|