🧪 Science with Sarah: Fossil Sandwiches🦖🍞 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
Here are the materials you'll need to make your own bread fossils (Copyright KSAT 2022 - All rights reserved) 4 slices of bread
Gummy candy
Plastic wrap
Heavy books
DO THE EXPERIMENT STEP 1 : Place a few gummy candies onto a slice of bread. SEE BELOW
STEP 1: Place a few gummies on a slice of bread (Copyright KSAT 2022 - All rights reserved) STEP 2: Top the gummy candies with another slice of bread, and repeat until you use 4 slices of bread.
STEP 3: Wrap your “sandwich” in plastic wrap. SEE BELOW
Wrap your "sandwich" in plastic wrap (Copyright KSAT 2022 - All rights reserved) STEP 4: Place heavy books on top of the “sandwich.” You can either wait for 24 hours or press down on the books.
STEP 5: Unwrap your “sandwich” and remove the layers of bread and gummy candies. Notice how the gummy candies leave imprints in the bread.
"Fossils" formed on your bread sandwiches! (Copyright 2026 by KSAT - All rights reserved.) HOW IT WORKS This experiment shows how pressure over time can create fossils.
The books represent the pressure on soil and rock over millions of years.
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.
Copyright 2026 by KSAT - All rights reserved.
About the Author Sarah Spivey headshot
Sarah Spivey is a San Antonio native who grew up watching KSAT. She has been a proud member of the KSAT Weather Authority Team since 2017.
Sarah is a Clark High School and Texas A&M University graduate. She previously worked at KTEN News.
When Sarah is not busy forecasting, she enjoys hanging out with her husband and cat, and playing music.
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