Wednesday, March 4, 2009
Osakis Earth Science Investigations
Lake Core Investigation, Osakis High School
Names: Paul, Rachelle, Becka, John
Procedure: 1. Drop two drops of water on glass slide.
2. Smear the sample onto the slide with tooth picks.
3. Put the cover slip on.
4. Examine the samples under a microscope.
Materials: 1. Glass slides
2. Cover slips
3. Compound microscope
5. Science journal
6. Tooth picks
7. Water dropper
8. Core sample (at 1cm and 33cm).
Data/Result: Total Diatoms-166
Conclusion: We found that there are more diatoms at 33 cm that at 1 cm. Three out of four of our people had more diatoms in 33 cm than in 1 cm. We think that there are more diatoms at 33 cm because it had more time to develop.
Do only certain diatoms live during a certain time or doesn't it matter when or where they lived.