10 most difficult clouds riddles A list of clouds related questions that are most often answered incorrectly Weather quiz What cloud is that?Morning Glory cloud. The Morning Glory cloud is a roll cloud, or arcus cloud, that can be up to 1,000 km long, 1 to 2 km high and often only 100 to 200 metres above the ground. The southern part of the Gulf of Carpentaria in Northern Australia is the only known location where it can be predicted and observed on a more or less regular basis due to the configuration of land and sea in the area.very hard 28% Morning Glory cloudMorning Glory cloud28%Kelvin-Helmholtz cloudKelvin-Helmholtz cloud33%AsperitasAsperitas18%Cumulonimbus IncusCumulonimbus Incus20%Created by: Ninjai. Statistics based on 103 answers in 3 languages »meteorology riddles » 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.very hard 35% CirrocumulusCirrocumulus18%CirrostratusCirrostratus35%StratocumulusStratocumulus24%StratusStratus21%Created by: Tschuka. Statistics based on 2370 answers in 2 languages »atmosphere riddles » What clouds produce a drizzle?Stratus. The term stratus is used to describe flat, hazy, featureless clouds of low altitude varying in color from dark gray to nearly white. Stratus clouds may produce a light drizzle or a small amount of snow. These clouds are essentially above-ground fog formed either through the lifting of morning fog or through cold air moving at low altitudes over a region. very hard 38% stratusstratus38%cumuluscumulus17%cumulonimbuscumulonimbus20%cirruscirrus23%Created by: Tschuka. Statistics based on 4381 answers in 3 languages »weather riddles » 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. very hard 39% Arcus cloudArcus cloud39%CirrostratusCirrostratus16%StratusStratus12%NimbostratusNimbostratus30%Created by: Tschuka. Statistics based on 4554 answers in 2 languages »nature riddles » What cloud is it?Cumulus clouds are clouds which have flat bases and are often described as "puffy", "cotton-like" or "fluffy" in appearance. Cumulus clouds can be formed from water vapor, supercooled water droplets, or ice crystals, depending upon the ambient temperature. They come in many distinct subforms, and generally cool the earth by reflecting the incoming solar radiation. hard 44% cumulonimbuscumulonimbus13%cirruscirrus29%cumuluscumulus44%stratusstratus12%Created by: Tschuka. Statistics based on 5201 answers in 2 languages »sky riddles » What cloud is it?Cumulonimbus, from the Latin cumulus ("storm cloud"), is a dense, towering vertical cloud associated with thunderstorms and atmospheric instability, forming from water vapor carried by powerful upward air currents. If observed during a storm, these clouds may be referred to as thunderheads. Cumulonimbus can form alone, in clusters, or along cold front squall lines. These clouds are capable of producing lightning and other dangerous severe weather, such as tornadoes. hard 45% stratusstratus7%cumuluscumulus37%cumulonimbuscumulonimbus45%cirrostratuscirrostratus8%Created by: Tschuka. Statistics based on 5744 answers in 2 languages »nature riddles » What is the name of this phenomenon?Iridescence is the phenomenon of certain surfaces that appear to gradually change colour as the angle of view or the angle of illumination changes. Examples of iridescence include soap bubbles, butterfly wings and sea shells, as well as certain minerals. It is often created by structural coloration (microstructures that interfere with light).hard 55% advectionadvection12%iridescenceiridescence55%rainbowrainbow13%Morning GloryMorning Glory19%Created by: Ninjai. Statistics based on 1782 answers in 3 languages »optics riddles » 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.average 60% volcanic dustsvolcanic dusts13%sulphuric acidsulphuric acid15%detergent vaporsdetergent vapors10%small droplets or ice crystalssmall droplets or ice crystals60%Created by: Tschuka. Statistics based on 19361 answers in 2 languages »illusions riddles » What kind of weather should you expect seeing these clouds called Cumulus humilis?Sunny. These puffy clouds are called "fair weather cumulus". They have little vertical extent and do not give precipitation. When they appear in a clear sky, they are an indicator of pleasant weather for the next several hours.average 63% sunnysunny63%rainyrainy9%stormystormy5%windywindy21%Created by: Harcerka. Statistics based on 12749 answers in 2 languages »geography riddles » On planet, except Earth, the greenhouse effect is observed? Venus. If a planet's atmosphere contains radiatively active gases, they will radiate energy in all directions. Part of this radiation is directed towards the surface, warming it. The greenhouse effect on Venus is particularly large because its dense atmosphere consists mainly of carbon dioxide.easy 70% SaturnSaturn9%JupiterJupiter12%UraniumUranium7%VenusVenus70%Created by: Tschuka. Statistics based on 1190 answers in 3 languages »space riddles » Play weather quiz and see all the questions.