Introduction: Magic Coffee Beans
Use "magic" coffee beans to turn marbles into table tennis balls!
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Necessary Materials
- Plastic box
- Table Tennis Balls
- Coffee Beans
Step 2: How to Prepare the Experiment
Fill the plastic box with the coffee beans
Place the table tennis balls on top of the coffee beans
Bury them until they are not visible.
Place the marbles over the coffee beans.
Now just shake the box with left / right movements
Step 3: Science Explains!
All materials have their own density. In this experiment we are using table tennis balls that are less dense than coffee beans and marbles that are denser than table tennis balls and coffee beans.
When we shake the box we are making the materials organize by density. Being the densest at the bottom of the box (the marbles), in the middle the coffee beans and the least dense at the top (the table tennis balls).
Remember that the density of a substance is its mass per unit volume.
This is an entry in the
Coffee Speed Challenge