Question: Which beaches in South Maui are Detrital and Biogenic?
Hypothesis. I hypothesize that big beach is biogenic and black sand beach is detrital.
Prediction: If big beach is biogenic, when we do the experiment the sand will crackle, if its detrital it wont do anything.
Procedure:
1.) Gathered materials
2.) Went to Big beach and Black sand beach
3.) Collected and Observed sand from those beaches.
4.) Put sand in beaker
5.) Added 20 drops of vinegar to sand
5.) Observed to see if the sand crackled and popped.
Materials: Pipette, Beaker, Sand, Vinegar, Journal, Plastic Cup
On Monday we went to the beaches to collect samples of sand. I observed that the sand at Big Beach was light brown with more of a fine texure and had a thinner feeling. Black sand beaches' sand was more rocky, and dark with light colors mixed together, it was also thicker and felt more dirty.
On Wednesday we tested the sand and found that both big beach and black sand beaches sand reacted to the vinegar, which made them snap and crackle, I was a little surprised that the sand from black sand beach was detrital, but I think it was because their was some lighter color sand from elsewhere that was blended in with that sand.
Conclusion: My question was which beaches in South Maui are detrital and biogenic. I hypothesized that Big beach would have biogenic sand and black sand beach would have detrital sand. My hypothesis was half correct, Big Beach did have biogenic sand but black sand beach did also.
Some errors could have possibly occurred, if we added too much vinegar to the sand during the experiment, also if the sand was accidentally mixed together with other sands.
BIG BEACH
BLACK SAND BEACH
Classmates observing sand
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