NASA KSNN How do clouds form?

Author:

NASA's Center for Distance Learning

Subject:

Science and Technology

Institution Name:

NASA

Collection:

NASA Kids Science News Network (NASA KSNN)

Grade Level:

Primary

Abstract:

Clouds form when water evaporates from rivers, ponds, oceans, and lakes. The air containing this evaporated water vapor rises and expands at higher altitudes where the air pressure is lower. The expanding air cools, and as this cooling occurs, the water vapor condenses (changes) from a vapor to a liquid. Many tiny water droplets form and a cloud is born.

Languages:

English, Spanish

Material Type:

Teaching and Learning Strategies, Other

Media Format:

Graphics/Photos, Text/HTML, Video

Technical Requirements:

Internet connection, Quicktime Player for streaming

Conditions of Use:

Public Domain
NASA still images; audio files; video; and computer files used in the rendition of 3-dimensional models, such as texture maps and polygon data in any format, generally are not copyrighted. You may use NASA imagery, video, audio, and data files used for the rendition of 3-dimensional models for educational or informational purposes, including photo collections, textbooks, public exhibits, computer graphical simulations and Internet Web pages.