Fossil Dig


Norman Barstowby:  Norman Barstow

Simulated Fossil Dig

Archeology is the study of society through the discovery, recovery and analysis of the material culture and environmental data that humans have left behind. The data can include artifacts, architecture, and cultural landscapes. Paleontology is the scientific study of prehistoric life.  It includes the study of fossils to determine organisms’ evolution and interactions with each other and their environments.  Most readers will recognize fictionalized accounts of the action and adventures in the pursuit of archeological or paleontological discovery from such blockbuster films as ‘Indiana Jones’ or ‘Jurassic Park’.  While this exercise may not feature the nonstop action and Hollywood fanfare of those films, it is still a fun and valuable classroom activity, not to mention much less expensive.

Objectives

The student will:

  • Practice fossil preparation skills using real tools and techniques by removing real fossils from an artificial matrix.
  • Be able to explain the difference between a chunk (broken piece) of fossil and a complete fossil bone.
  • Be able to list reasons why broken fossils are more common in nature than complete fossils.

Materials

* Plastic butter tubs (1 per student) OR larger plastic trays (for a student group).

* Sand (use contractor or play sand, clean, with no pebbles)

* Fossil Sorting Kit from Educational InnovationsFossil Dig Kit

* Potting soil (to add to matrix mixture and to cover the completed matrix).

* Plaster

* Water (sink)

* Bucket

* Stirring stick

* Small rocks and pebbles (per tub/tray) to add reality to the scene.

* Dental picks (w/erasers on one end, 1 per student) or dental picks with handles **

* Plastic knife

* Toothbrush or other stiff brush. (1 per student)

* Plastic trays (1 per student)

* Ziploc bags (1 per student)

* Permanent markers (1 or more)

* Pith helmet (optional)

**  Available from the Widget Supply Company

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The Science of Sound Waves


Michelle Bertkeby:  Michelle Bertke

Sound can be a difficult concept to portray because the sound waves cannot be seen or touched.  Luckily, there are several at home experiments that demonstrate the properties of sound waves.

Water tank to show ‘Sound Waves’

Sound WavesYou can use a fish tank half filled with water to give a visual demonstration of ‘sound waves’.  Water is a perfect medium to show the propagation of waves. This demonstrates how sound waves travel though the air.  There are two ways to display this activity.  One way is to simply press your hands onto the top of the water and allow the waves to be made by the pressure of your hand.  This allows students to see how waves travel though a medium.  You can also use this to point out the aspects of a wave such as frequency and amplitude.  Another way to show waves is to place a speaker next to the tank and allow the sound to produce the waves.  This can show that sound is a form of pressure just like your hand. Read the rest of this entry »