Dust in the Wind; Chemicals in the Water
Laboratory Materials List by Laboratory Stations
Laboratory Station #1
Laboratory Station #2
Laboratory Station #3
Laboratory Station #4
Laboratory Station #5
Laboratory Station #6
Laboratory Station #7
Laboratory Station #8
Chemical Weathering
Materials List
Chalk
Water
Vinegar
3 Jars or plastic bags
Mechanical Weathering
Materials List
Sandpaper
Assorted Rocks
Chemical Weathering
Materials List
Sugar cubes
Hot water (a hot plate might be useful)
Warm Water
Cold Water (water in an ice bath)
3 Jars or plastic bags
Mechanical Weathering
Materials List
Assorted Rocks
Assorted Jars
Chemical Weathering
Materials List
Steel Wool
Water
Vinegar
3 Jars or plastic bags
Mechanical Weathering
Materials List
Sugar cubes
Jars
Blow Dryer
Chemical Weathering
Materials List
Sugar Cubes
Water
Mechanical Weathering
Materials List
Assorted pieces of Sand stone
White Aquarium sand
http://pulse.pharmacy.arizona.edu/9th_grade/culture_cycles/earth_science/erosion.htm
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Laboratory Teacher explanation by Laboratory Station
Laboratory Station #1
This is an example of chemical weathering because the chalk
(which is analogous to limestone) reacted to the vinegar (acid)
and has been changed into a new material. Acids (in water or
rain) will dissolve many minerals.
Laboratory Station #2
This is much like what occurs in a river or a sand dune.
Particles of sand (the sand paper) abrade the surrounding rock
turning them into sand as well. Students may also notice that
the sandpaper is self has become eroded.
Laboratory Station #3
The temperature of water effects chemical weathering. Hot
water will erode faster because the water molecules are moving
faster and there is more space to store the eroded material in
the water. What about melting points, what is happening to the
material?
Laboratory Station #4
This demonstrates rock falls. As a rock falls onto another rock
they fracture each other. The fractures split the rocks. After
enough successive fractures the rocks become sand.
Laboratory Station #5
Both the water and the vinegar chemically weather the steel
wool. The rust is the new material that is formed from the iron
in the steel wool.
Laboratory Station #6
This demonstrates wind erosion. It is a slow process, gradually
pushing particles off the sugar cube (which represents a rock).
How do they use the jar?
Laboratory Station #7
This demonstrates dissolving of minerals in water. Depending
upon the make-up of the rock, some compound may actually
break into their elemental components.
Laboratory Station #8
This can demonstrate wind erosion or how sand in moving
water erodes. The particles from the colored rock are abraded
by the sand and soon become bits of sand themselves.
http://pulse.pharmacy.arizona.edu/9th_grade/culture_cycles/earth_science/erosion.htm
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