Shop Windows to the Universe

Earth Science Rocks! Select one of our four cool NESTA t-shirts from our online store, and express your love of Earth and space science!
This is a diagram of the nine different kinds of ice.
Click on image for full size
Image from: Bridgeman, [1937]

There are Nine Different Kinds of Ice

The phase of ice means the form of ice which takes shape. There are nine different kinds of shapes the ice crystal can assume. It all depends upon what temperature the ice feels, and what pressure the ice is under. The diagram tells under what environment to expect to find these different kinds of ice.

A basic ice cube from your refrigerator is known as Ice I, which is the form of ice which exists at the temperatures and pressures in the bottom left corner of this diagram. If the temperature get high enough, that form of ice melts, just as an ice cube would on your kitchen table, and forms water.

As a moon evolves, it may cool down from a period of being warm. The question is whether it is presently warm enough inside a moon for ice to be in motion, to form layers of water, or for evidence of interior activity to be produced visibly on the surface.

Shop Windows to the Universe Science Store!

Learn about Earth and space science, and have fun while doing it! The games section of our online store includes a climate change card game and the Traveling Nitrogen game!

Windows to the Universe Community

News

Opportunities

You might also be interested in:

Cool It! Game

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

Internal Warming of an Icy Moon

If the satellite has means of warming itself, then beside surface changes due to evolution, then the interior may go through many startling changes as the moon evolves. The moon may have water inside,...more

Amalthea

Amalthea was discovered by E Barnard in 1872. Of the 17 moons it is the 3rd closest to Jupiter, with a standoff distance of 181,300 km. Amalthea is about the size of a county or small state, and is just...more

Callisto

Callisto was first discovered by Galileo in 1610, making it one of the Galilean Satellites. Of the 60 moons it is the 8th closest to Jupiter, with a standoff distance of 1,070,000 km. It is the 2nd largest...more

Evolution of Callisto

Most of the moons and planets formed by accretion of rocky material and volatiles out of the primitive solar nebula and soon thereafter they differentiated. Measurements by the Galileo spacecraft have...more

Very Large Impact Crater

Many examples of the differing types of terrain are shown in this image. In the foreground is a huge impact crater, which extends for almost an entire hemisphere on the surface. This crater may be compared...more

Surface of Callisto

The surface of Callisto is deeply pockmarked with craters. It looks to be perhaps the most severely cratered body in the solar system. There are also very large craters to be found there. The severity...more

Europa

Europa was first discovered by Galileo Galilei in 1610, making it one of the Galilean Satellites. Europa is Jupiter's 4th largest moon, 670,900 km from Jupiter. With a diameter that is about half the distance...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF