What Makes Peanut Butter Smooth? Science Project for Kids

This Science project is good for elementary school children up to 3rd grade.
Have you ever wondered why peanut butter is smooth? Well, in this fun and easy Science experiment kids will learn about the chemical process of hydrogenation.
Question: What makes peanut butter smooth?
Materials: 1 jar of natural peanut butter, 1 jar of Skippy creamy peanut butter, 1 spoon, 2 cereal bowls
Procedure:
Step 1: In the first bowl add two large spoonfuls of the natural peanut butter.  Mix it well with the spoon.
Step 2: In the second bowl add two large spoonfuls of the Skippy creamy peanut butter.  Mix it well with the spoon.
Step 3: Let both bowls of peanut butter sit still for 1 hour.
Step 4: Look what happened and record your results.
What Happened to the Bowls of Peanut Butter?
The Skippy creamy peanut butter will still look creamy and smooth.  The natural peanut butter has a layer of oil on top, why?  Peanuts contain oil naturally.  When peanuts are mashed together to make peanut butter, the oil separates from the peanut. When you mixed the natural peanut butter the oil mixed with the peanuts.  When you let it sit for an hour the oil separated itself from the peanuts again.  This caused the oil to sit on top of the peanut butter.  Why doesn’t this happen to the Skippy peanut butter?  Because it was put through a process called hydrogenation.  Hydrogenation is a chemical reaction that turns liquid oil into solid fat by combining the oil with hydrogen gas.  The hydrogenation process changes the atoms in the liquid oil into a solid fat this makes the peanut butter smooth and creamy.
A closer look
Look at different labels on foods.  See how many ingredients contain hydrogenated oils. You’ll be surprised.