Engineering Challenge -- What Makes an Object Float?

Read about the concept of buoyancy.  We will be applying this concept in our engineering task this week.  We will be creating boats out of aluminum foil and seeing how many pennies they can hold.
Read more about buoyancy basics here.
How do boats float?  Wonderopolis
The buoyant force of water. (bonus activity idea)
Here is your task:  Float My Boat.  We will use this chart to record our designs.