One of our favorite peeps from Sassafras Science, Summer Beach, loves to finish off a good sandwich-lunch with a cookie for dessert and these sedimentary rock cookies are a perfectly yummy way to blend science and food during the summer!
Before we share the recipe for the rock cookies, let's review a bit about sedimentary rocks.
Rocks are the hard objects that make up the Earth's surface. We can literally find them everywhere!
Rocks can be broken into three main categories based on how they were formed. There are igneous, metamorphic, and sedimentary rocks.
Sedimentary rocks are made from various layers of crushed minerals and the decayed remains of plants or animals. The layers can easily be seen and sedimentary rock tends to be very weak.
These rocks make up about 75% of the Earth's surface! Sandstone, limestone, coal, and gypsum are all examples of sedimentary rocks.
So now that we know what these rocks are, let's get to the yummy science!
These sedimentary rock cookies are made layer by layer, just like sedimentary rocks. You will need the following ingredients:
Here's how to make the cookies:
Let the cookies cool a bit before cutting them into squares. After they cool completely, you can eat and enjoy your sedimentary rock treats!
Want to learn more about rocks, here are a few ways we can help with that:
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