Millions of years of geology, pressed into a sandwich
Hello parents, teachers and students! If you’re looking for a fun way to explore how fossils are made, check out these gummy worms and bread fossils.
Be sure to check out GMSA@9 on Wednesdays, when KSAT Meteorologist Sarah Spivey demonstrates and explains the science behind it.
HERE’S WHAT YOU’LL NEED
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4 slices of bread
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Gummy candy
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Plastic wrap
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Heavy books
DO THE EXPERIMENT
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STEP 1: Place a few gummy candies onto a slice of bread. SEE BELOW
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STEP 2: Top the gummy candies with another slice of bread, and repeat until you use 4 slices of bread.
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STEP 3: Wrap your “sandwich” in plastic wrap. SEE BELOW
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STEP 4: Place heavy books on top of the “sandwich.” You can either wait for 24 hours or press down on the books.
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STEP 5: Unwrap your “sandwich” and remove the layers of bread and gummy candies. Notice how the gummy candies leave imprints in the bread.
HOW IT WORKS
This experiment shows how pressure over time can create fossils.
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The books represent the pressure on soil and rock over millions of years.
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The imprints left by the gummy candies represent fossils!
SCIENCE WITH SARAH
If you’d like Sarah to come to your school and conduct a science experiment live on KSAT, fill out this form. “Winners” are selected at random.
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About the Author
Great Job Sarah Spivey & the Team @ KSAT San Antonio for sharing this story.

