10 most difficult clouds riddles A list of clouds related questions that are most often answered incorrectly Nature quiz 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 2026 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 4194 answers in 2 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 4333 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 4986 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 5511 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 54% advectionadvection12%iridescenceiridescence54%rainbowrainbow13%Morning GloryMorning Glory19%Created by: Ninjai. Statistics based on 1385 answers in 2 languages »meteorology 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 18683 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 62% sunnysunny62%rainyrainy9%stormystormy5%windywindy21%Created by: Harcerka. Statistics based on 12270 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.average 67% SaturnSaturn12%JupiterJupiter13%UraniumUranium7%VenusVenus67%Created by: Tschuka . Statistics based on 567 answers in 2 languages »Venus riddles » Which acid mostly contributes to acid rains?Sulfuric acid. The most important gas which leads to acidification is sulfur dioxide, coming from fossil fuel combustion and industry (and, in lesser amounts, from volcanoes and wildfires). In recent years, emissions of nitrogen oxides which are oxidized to form nitric acid are of increasing importance due to stricter controls on emissions of sulfur containing compounds. easy 77% hydrochloric acidhydrochloric acid5%sulfuric acidsulfuric acid77%nitric acidnitric acid14%citric acidcitric acid1%Created by: Cleo. Statistics based on 13959 answers in 4 languages »acids riddles » Play nature quiz and see all the questions.