Student Activity Kit
Materials Included In Kit
Filter paper, 125-mm, 100 sheets
Microfossil spoons, 2
Petri dishes with lids, 100-mm, 15
Pipets, Beral-type, 15
Rubber legs, approx. 40
Super glue, 1 tube
Tube of microfossil sievings
Wood dowel sticks, 20
Additional Materials Required
Stereoscope (dissecting scope) with above-stage illumination
- The rubber-tip widgets should be assembled before class by the instructor.
- Place one small dot of super glue on the pointed end of the supplied wood dowel stick (see Figure 2).
- Place one piece of rubber leg onto the super glue on the wood dowel stick (see Figure 3).
- Allow to dry.
Although the materials in this kit are considered relatively nonhazardous, please follow all normal laboratory safety guidelines. Remind students to wash their hands thoroughly with soap and water before leaving the laboratory.
Please consult your current Flinn Scientific Catalog/Reference Manual for general guidelines and specific procedures, and review all federal, state and local regulations that may apply, before proceeding. The microfossils may be saved for future use or disposed of according to Flinn Suggested Disposal Method #26a.
- Enough materials are provided in this kit for 30 students working in pairs. This laboratory activity can reasonably be completed in one 50-minute class period.
- The Microfossil Worksheet should be copied and supplied to the students for multiple microfossil drawings and classifications.
- The microfossil samples may be dispensed (using the microfossil spoon) by the instructor if desired.
- Extra filter paper has been given for additional microfossil sorting.
- 20X magnification works best for the viewing of microfossils.
- The filter paper is used under the microfossil sorting dish to provide a white background for easy microfossil viewing. It may be removed if desired.
- The included microfossil CD contains a wealth of pictures and information about the different types of microfossils that have been isolated from the specific collection site. It is a great student reference and teaching tool for this activity.
- Have students write brief essays describing the biotic environment in which the microfossils found in this activity lived during the Devonian Period.
- Have students research the types of microfossils found in your state and if they can be readily found. If so, have students list the microfossil locations and geological periods.
Category of Microfossil: ___Snail___
Answers to Questions
- What key features (e.g., size, shape, markings, textures) of this microfossil provides key evidence as to its identity?
Coiled shell, smooth surface, etc.
- What structure of the organism formed the microfossil?
This was the shell of the organism.
- Do you think this organism lived in a group or individually?
This microfossil most likely lived individually.
- Do you think this was a free-moving organism?
This was a free-moving organism.
- Do any related marine species still exist today? Which ones?
This organism is related to the common snails of today.
- What is the likely mineral or chemical composition of this microfossil?
- Which categories of microfossils were most commonly found by your group? What about the class?
Student answers will vary.
- Give possible reasons why microfossils in some categories may be more abundant than others.
Student answers will vary. Location gathered, depth of the sample, conditions when organisms were fossilized, etc.
- List similarities and differences between the identified microfossil specimens.
Student answers will vary.
- Besides the categories of organisms represented in the Checklist and Photos of Microfossil Categories in Sievings, what other marine organisms (invertebrate or vertebrate) were also abundant during the Devonian Period, as evidenced from fossil specimens collected worldwide?
The vegetation of the early Devonian consisted primarily of small plants, the tallest being only a meter tall. By the end of Devonian, ferns, horsetails and seed plants had also appeared, producing the first trees and the first forests. Also during the Devonian, two major animal groups colonized the land. The first tetrapods, or land-living vertebrates, appeared during the Devonian as did the first terrestrial arthropods, including wingless insects and the earliest arachnids. In the oceans, brachiopods flourished. Crinoids and other echinoderms, tabulate and rugose corals and ammonites were also common. Many new kinds of fish appeared.
- Find reference information showing continent positions during the Devonian Period (about 400 MYA). Describe the global location/position of the underwater land mass.
During the Devonian Period, there were three major continental masses. North America and Europe sat together near the equator with much of their current land underneath the sea. A portion of modern Siberia lay to the north. A composite continent of South America, Africa, Antarctica, India and Australia dominated the southern hemisphere.
Special thanks to the late Dr. Charlie Drewes, IA, for presenting this activity to Flinn Scientific.
Boardman, R. S. et al. (1987) Fossil Invertebrates, Blackwell Scientific, Palo Alto, 713 pp.
Clarkson, E. N. K. (1998) Invertebrate Palaeontology and Evolution, 4th Ed., Blackwell Science, Oxford, 452 pp.
Lehmann, U. & G. Hillmer (1980) Fossil Invertebrates, Cambridge University Press, Cambridge, 350 pp.
Levin, H. L. (1999) Ancient Invertebrates and Their Living Relatives, Upper Saddle River, NJ, Prentice Hall, 358 pp.
Thompson, I. (1999) National Audobon Society Field Guide to North American Fossils, Knopf Publishing, 848 pp.