Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.
Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.There are other very strange, very rare forms of matter as well. Degenerate matter can come into being under incredibly high pressure inside white dwarf and neutron stars. A Bose-Einstein condensate can only form at temperature near absolute zero, and was first created in a lab in 1995. There are several other very exotic and unusual forms of matter that we don't encounter in daily life. Stars are made of plasma, so plasma is the most abundant form of matter in the Removing electrons from atoms (usually in a gas) to produce a plasma is called "ionization". Sometimes (usually at low pressure) a solid can become a gas directly (without first melting to become a liquid) this transformation is called " sublimation". Condensation is changing from a gas to a liquid. The transition from liquid to gas can happen by boiling or evaporation. Freezing is turning from a liquid to a solid melting is turning from a solid to a liquid. There are special names for most transitions from one state to another. A plasma created from water would include electrons, protons (hydrogen atom nuclei), and oxygen atom nuclei (protons and neutrons). We call water in its gaseous form "water vapor". This figure shows the four common states of matter: solid, liquid, gas, and plasma.Ĭonsider water as an example.
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