Project Description  (5) Students will design and build their own boats using recyclable/every day items. They will practice math skills by working with a materials budget. The students will observe the concepts of buoyancy and density at work and gain a greater understanding of how this effects boats. 

Recommended Grade  5th grade 
Category 
S.
T.
E.
A.
M.

Sciece Topic  Force and Motion 
Standards  Force and Motion: North Carolina
Engineering: NGSS

Content  Why do things float? It has to do with their density. Density describes how much mass is packed into an object. Mass is the stuff that everything is made of. Something with more stuff will be more massive. Water is pretty dense and only objects with a greater density than water will sink. 
Learning Outcomes  Students should be able to describe what happens to the mass and buoyancy of the boat when the pennies are added. Students should be able to describe the forces acting on the boat before and after the pennies are added. Students will have to work within their budget and learn to iterate to produce a costeffective boat that holds a maximum number of pennies. 
Materials  Materials:
Prep

Directions  1. Introduce the project and then introduce the students to the basics of buoyancy and density. We do a demonstration with items that will float and sink.
Debrief
Time Estimate: 75 minutes 
Comments  The 20162017 school year will be our first year with 5th grade students. We are excited to try a more indepth version of this project with our 5th graders.
