atmosphere facts Selected as the most interesting among nature related questions in Nature quiz Why is the ozone hole dangerous?It increases UV radiation. In the ozone layer, ozone molecules absorb UV-B and UV-C radiation - short wavelength forms of ultraviolet that can disrupt organic molecules, producing cancerous changes in living cells.Created by: Riho IshiiEarth facts » In which layer of the atmosphere the aurora is created?In the Thermosphere. Auroras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma, mainly in the form of electrons and protons, precipitate them into the upper atmosphere (thermosphere/exosphere) due to Earth's magnetic field, where their energy is lost. Created by: Tschuka Arctic facts » The bright circle around the Sun seen in the picture is known as a halo. What causes it?Refraction of light in ice crystals. Halo is the name for a family of optical phenomena produced by light interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky. Among the best known halo types are the circular halo (properly called the 22° halo), Other common optical phenomena involving water droplets rather than ice crystals include the glory and the rainbow. Created by: Tschuka Sun facts » What is the third by volume, after nitrogen and oxygen, component of dry air?Argon represents 0.934% of the earth's atmosphere and 1.28% of its mass. Ar-40 is an isotope that makes up the majority of the earth's argon. It is a result of decaying of another elements' unstable isotopes, mainly Potassium-40.Created by: Rafałchemistry facts » What cloud occurs in the form of 'almost invisible curtain' and gives no rainfall?Cirrostratus is a high-level, very thin, generally uniform stratiform genus-type of cloud, composed of ice-crystals.Created by: Tschuka clouds facts » This is a rare phenomenon called iridescent clouds. It occurs in the clouds with ...Small droplets or ice crystals. The effect is similar to irisation. Iridescent clouds are a diffraction phenomenon caused by small water droplets or small ice crystals individually scattering light. Larger ice crystals do not produce iridescence, but can cause halos, a different phenomenon.Created by: Tschuka sky facts » What is the name of this cloud?Arcus clouds most frequently form along the leading edge or "gust fronts" of thunderstorm outflow; some of the most dramatic arcus formations mark the gust fronts of derecho-producing convective systems. Roll clouds also may arise in the absence of thunderstorms, forming along the shallow cold air currents of some sea breeze boundaries and cold fronts. Created by: Tschuka weather facts » Play nature quiz and see all the questions.