High school chemists concentrate on the formation of polymers through condensation reactions. A video also explains the process of breaking them down through hydrolysis.

Young scientists will never look at clouds the same way again after watching this video from PBS Digital Studios. Viewers learn about the different types of clouds and their formation. The video will make your classes want to lie on...

Sweating isn't gross; it actually serves an important purpose! Learn how evaporation absorbs energy and condensation releases energy. 

What happens to humans when there is a limited supply of freshwater? This is the focus of a video that discusses the affects on communities of freshwater as a limited resource.

How does water travel? This is the focus of a video that describes how water moves via the water cycle. An in-depth discussion explains the constant repetition of evaporation, condensation, and precipitation that makes up the water...

Will tomorrow's soccer game be rained out? That depends on the water cycle. An animated feature explains precipitation, evaporation, transpiration, and condensation with diagrams and dialogue between Sam and RJ as they huddle under a...

Try this experiment with your class. Condensation in relation to temperature and water vapor in the air is shown through a simple experiment using cold glasses. Show this clip to your class or repeat this experiment and hold a scientific...

An expert on the water cycle is featured giving a lecture about the basics of the water cycle. The teacher stands at a whiteboard that has a particularly good illustration that shows how the cycle works quite nicely. He makes a special...

Although very short, this video imparts the basic information associated with the water cycle. It might be best-used as a refresher for the teacher to make sure he/she has the most important vocabulary words and their definitions down.

This animated video shows many different aspects of the water cycle. This resource has additional links that explore the impact of global warming and groundwater removal on the water cycle.

In this video segment adapted from ZOOM, cast members assemble a solar still and make fresh water from saltwater, demonstrating two steps of the water cycle, evaporation and condensation. 3m 32s

A video lecture explaining that vapor pressure is the pressure exerted by a vapor in equilibrium. Also explained is how kinetic energy relates to temperature and vapor pressure. The video also explores how evaporation plays a role in...

This animation from NASA visualizes the steps of the water cycle, including precipitation, evaporation, transpiration, and condensation. [0:52]

This lesson will review the terminology of phase transitions. It is 2 of 2 in the series titled "Changes of State: Terminology."

Learn to make a very impressive cloud form in a plastic bottle! By pumping air into an empty plastic bottle and quickly releasing the pressure, we can cool off the air and force the water to condense into a thick cloud. It's a very...

Watch a class discusses their ideas about evaporation and condensation. [9:45]

In this video, a teacher demonstrates heating water in a beaker. [3:16]

A video poem describing the path water takes as it travels through water cycle as it evaporates, condenses and turns into precipitation. [1:50]

A video showing an experiment to find out the reason why water collects on the outside of a cold glass. The experiment concludes that the water must come from the water vapor in the air. [1:44]

This lesson will introduce the phase changes that occur at the boiling, freezing, and melting points. It is 3 of 4 in the series titled "Boiling, Freezing, Melting Point."

This lesson will review the terminology of phase transitions. It is 1 of 2 in the series titled "Changes of State: Terminology."