50 State Rhyme - 34.5 Seconds! The States of the USA. Water phase diagram. Phase diagrams The phase diagram of water Density change Triple points The ice phases Phase diagrams Phase diagrams show the preferred physical states of matter at different temperatures and pressure. The phase diagram of water The phase diagram of water is complex,b having a number of triple points and one, or possibly two, critical points. The mean surface conditions on Earth, (also atmospheric conditions, Mars and Venus on mousing over Earth) are indicated. The high-pressure phase line between ice-ten (X) and ice-eleven (XI) [81] is still subject to experimental verification. Both the critical points are shown as red circles in the phase diagram, above.
Density changes As pressure increases, the ice phases become denser. The liquid-vapor density data for the graphs above, opposite and below were obtained from the IAPWS-95 equations [540]. Other phase diagrams for water are presented elsewhere [681]. [Back to Top Triple points Footnotes a Gaseous water is water vapor. But, where V is the volume. Countries of the World Quiz.
GeoGuessr - Let's explore the world! What you need to know about tornadoes. (CNN) -- A tornado is a funnel-shaped cloud that forms under thunderclouds and contains rapidly rotating air. Most tornadoes form from severe thunderstorms. Hurricanes can also produce tornadoes. Other Facts: Tornado winds may exceed 300 miles (480 kilometers) per hour. Tornadoes can lift cars, mobile homes, and animals into the air. Tornadoes are sometimes called "twisters. " The damage path of a tornado is usually less than 1600 feet wide. Most tornadoes move at less than 35 miles per hour. Most tornadoes last only a few minutes.
The most destructive and deadly tornadoes occur from supercells, which are rotating thunderstorms with a well-defined radar circulation called a mesocyclone. A tornado over a body of water is called a "waterspout. " The United States has the highest number of tornado occurrences in the world with an average of 1,000 tornadoes reported each year. According to the National Weather Service, in 2012 there were 70 tornado-related deaths in the U.S. Timeline: Our amazing planet. Moving slabs [This Dynamic Earth, USGS]
The layer of the Earth we live on is broken into a dozen or so rigid slabs (called tectonic plates by geologists) that are moving relative to one another. "Historical perspective" Geosense: an online world geography game. World Capitals Quiz. Geography of Europe. Länder der Welt Quiz. Asia - geography online games. Flags of Every Country. Education.