Determine the amount of calcium carbonate in a sample of crushed rocks.
Determine the specific gravity of mineral specimens
Determine the hardness of mineral specimens
Build a flume to investigate stream flow
Determine the angle of repose for various grain sizes of sand and gravel
2007-03-20 09:01:25
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answer #1
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answered by David A 5
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Build a model to demonstrate how earthquakes are caused
The apparatus consists of a heavy object that is dragged steadily with an elastic cord. Although pulled with a constant velocity, the heavy object repeatedly slides and then stops. A small vibration sensor, attached to a computer display, graphically monitors this intermittent motion.
Difficulty: High school
Compare the porosity of different types of soil
Soils are made of particles of different types and sizes. The space between particles is called pore space. Pore space determines the amount of water that a given volume of soil can hold. Porosity is the percentage of the total volume of soil that consists of pore space. This is an important measurement in areas where drinking water is provided by groundwater reserves
Difficulty: Elementary school
Demonstrate how erosion happens in different ways
No matter where you look, the land you see is a battleground. On one side of the battle are the forces beneath the surface. These forces cause the crust to be faulted, folded, tilted, and lifted. On the other side of the battle are the natural processes of weathering and erosion. Once rock has been broken up by weathering the small pieces can be moved by water, ice, wind, or gravity. Ev
Difficulty: Elementary school
Demonstrate how lava flows when a volcano erupts
This model is easy to demonstrate and very useful in relating hazards associated with lava flows (or mud flows). However, this model costs more and requires you to order a plastic three-dimensional map.
Difficulty: Middle school
Demonstrate how volcano's erupt using an air-pressure model
You may wish to do this demonstration outside. This apparatus will use air pressure to propel tephra (sand) into the air. A fan disperses the tephra downwind where it accumulates to form a cinder cone. Visibility of the tephra is enhanced if a white sheet or cardboard is used as a backdrop and drop cloth.
Difficulty: High school
How soil management affect soil quality?
Soil is one of our most precious natural resources, as it integrates all parts of the ecosystem. It provides a medium for plant growth so that we can have food, clothing, and other materials. Soil filters water, decomposes waste, stores heat, and exchanges gases. Soil is alive- it is the home to billions of micro- and macroscopic organisms. It is a material used for construction, medicine, and art
2007-03-25 08:48:36
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answer #2
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answered by Anonymous
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