• ## Color Mixing and Liquid in Space

Observe what happens when astronauts dissolve an effervescent tablet in water aboard the International Space Station in this video from NASA. Astronauts use food coloring to color the sphere of water and then place an effervescent tablet into the sphere to demonstrate fluid behavior in microgravity.

• ## Teaching from Space: Centripetal Force

Watch a NASA astronaut on board the International Space Station demonstrate centripetal force by swirling a tethered tool around a cord, rotating a bag of tea to demonstrate that the air bubbles are pushed toward the center, and spinning a water droplet to show its deformation based on centripetal force. In this video from NASA's Teaching from Space program, learn more about the force that keeps the planets in orbit around the Sun, keeps the moon in orbit around the Earth, and keeps roller coasters secure as they loop and curl.
• ## Teaching from Space: The Bernoulli Principle

In this video from NASA, astronauts demonstrate the Bernoulli Principle on board the International Space Station. Using everyday objects like tissue boxes and a piece of paper, the astronauts show that when a liquid or gas flows more quickly, its pressure decreases. Also shown are some everyday on-Earth examples of the Bernouilli's Principle in action.
• ## Teaching from Space: Surface Tension

In this video from NASA, join an astronaut aboard the International Space Station as he demonstrates two properties of surface tension using water droplets.
• ## Mass vs. Weight: Air Powered Mass

In this video, astronauts on board the International Space Station conduct an experiment using an air gun to exert a consistent force on two difference masses -- an empty water bag and a full water bag. With different masses, the two bags respond differently to the force, in accordance with Newton's Second Law: F=ma.
• ## Mass vs. Weight: Introduction

In this video from NASA's Teaching From Space initiative, two astronauts aboard the International Space Station (ISS) describe mass and weight and the differences between the two. Embedded animations and demonstrations support the video's learning goals.