Classroom Activity

Neutral Buoyancy: Astronaut Training Is Not Always "Sink or Swim."
First page of Neutral Buoyancy: Astronaut Training Is Not Always "Sink or Swim."

The information in this document was accurate as of the original publication date.

Audience: Educators
Grades: 9-12


Watch the short NASA Brain Bites video "Why Do Astronauts Practice Underwater?" and use the accompanying resource sheet to explain sinking and floating. NASA astronauts simulate floating in space as they train for spacewalks in a huge pool called the Neutral Buoyancy Laboratory. The video shows the NBL, and the resource sheet lists questions, answers and resources to stimulate a discussion on density and Archimedes' Principle. The resource sheet includes links to more buoyancy activities.

Neutral Buoyancy: Astronaut Training Is Not Always "Sink or Swim."  [88KB PDF file]

Why Do Astronauts Practice Underwater?
>  View video  →

More NASA Brain Bites resource sheets
What Is the Temperature of Space?
Spacesuits: Pressurized Protection from Thermal Effects