Citizen Math used to be called Mathalicious. If you have a current account on Mathalicious, you can use those credentials to log in to your Citizen Math account. Learn more here.

Logo icon 2 color
Bottledwater lessonpage

Bottled Water

What’s the best size of disposable water bottle?

Login to add lessons to your favorites

Bottled Water

What’s the best size of disposable water bottle?

Login to add lessons to your favorites
Bottledwater lessonpage
Log In or Sign Up to Access Lesson Materials
Log In or Sign Up to Access Lesson Materials
Log In or Sign Up to Access Lesson Materials

What’s the best size of disposable water bottle? Bottled water is one of the best-selling drinks on Earth. While disposable bottles offer a convenient way to stay hydrated, they also require a lot of plastic that can be harmful to the environment.

In this lesson, students use the volume and surface area of cylinders to compare disposable water bottles and consider environmentally-friendly ways to stay hydrated.

REAL WORLD TAKEAWAYS

  • Millions of tons of single-use plastic water bottles have ended up in the oceans and are wreaking havoc on wildlife
  • Our daily consumption habits, like what size and material water bottle to use, affect the well-being of the planet and a host of creatures living on it.
  • We can slow the flow of plastics into the oceans when we: (1) reduce, (2) reuse, (3) recycle, (4) repair, (5) rethink, (6) refuse.

MATH OBJECTIVES

  • Use the formulas for volume of a cylinder and volume of a sphere to solve real-world problems.
  • Model with geometry.
  • Reason about the surface area of a real-world object. (No formulas required.)

Appropriate most times as students are developing conceptual understanding.
Lesson gauge medium
Grade 8
Cones, Cylinders, Spheres
Lesson gauge medium
Grade 8
Cones, Cylinders, Spheres
Content Standards 8.G.9 Know the formulas for the volumes of cones, cylinders, and spheres and use them to solve real-world and mathematical problems.
Mathematical Practices MP.3 Construct viable arguments and critique the reasoning of others. MP.4 Model with mathematics. MP.7 Look for and make use of structure.

Other Grade 8 Lessons