Clouds that look like cotton balls are called cumulus clouds. They form when warm, moist air rises. As this air rises, it cools, condensing into water droplets that become puffy clouds. Cumulus clouds develop from the bottom upward.
A:The average winter temperature in a cold desert is usually between -20 and -30 degrees Fahrenheit. The average rainfall for these areas is only between 6 and 10 inches per year. Tundra also experiences brutally cold wind.
A:Condensation and frost on the inside of windows occur when warm, humid air inside comes in contact with a pane of glass chilled by the outside air, according to the American Society of Home Inspectors. This reduces the temperature of the air in contact with the glass, forcing condensation of moisture. If the outside temperature is cold enough, this moisture can freeze on the glass and create interior frost.
A:Weather patterns on Earth are driven by the unequal heating of the surface by sunlight. The Sun is the ultimate source of energy that drives wind, rain and storms across the planet. The movement of wind patterns, ocean currents and even the water cycle can all be thought of as global mechanisms for redistributing heat from the Sun.
A:A tornado is a violently swirling column of air that is formed in severe thunderstorms and contains a hollow core. It is characterized by rotating air that often contains dust and debris and quickly spirals upward. The column’s bottom touches the ground, while the top extends five or more miles into the sky.
A:Hygrometers measure the amount of moisture or humidity in the air, but there are a number of different types of hygrometers, and they display their results in different ways. Most hygrometers display their readings in the amount of water in a given volume of air, making the units milliliters per cubic centimeter. Alternatively, some hygrometers measure relative humidity, which is expressed as a percentage with no units.
A:Dawn, also known as daybreak, is the time of morning when the first light appears in the sky prior to sunrise, which is the appearance of the top of the sun over the horizon. Dawn occurs roughly 30 minutes before sunrise at sea level.
A:Every 24 hours and 50 minutes, the Earth experiences two high tides and two low tides. High tides occur every 12 hours and 25 minutes. From high tide to low tide is a span of six hours and 12.5 minutes.
A:The reason your windows become steamed up or foggy is that water droplets condense out of the air onto the glass. The moisture in the air is not attracted to the glass specifically; rather, the moisture condenses on the coolest surfaces in the area. The windows are usually the coldest surface in a residential home or office building.
A:It is coldest just about the time of sunrise because this is the hour at which the atmosphere has been without the heat of the sun for the longest time. The lowest temperature of the day usually occurs then.
A:The Department of Geological Sciences at San Diego State University names extraterrestrial impacts, gravitational contraction and radioactive decay as the three main sources of Earth's internal heat. However, Earth's internal heat is much lower now than it was at the early period of the solar system’s existence.
A:Rainbows form when sunlight enters water droplets from behind the viewer. The geometry of the water droplets allows for refraction and reflection. Sunlight, which is composed of light of different wavelengths, splits into the constituting wavelengths because of refraction when it enters the water droplet, and it is then reflected from the inner surface of the droplet to the viewer. The ray undergoes refraction again when it exits the droplet.
A:The sun's rays are strongest daily between the hours of 10 a.m. and 4 p.m., according to Sun Safety Alliance. Experts suggest seeking shade, wearing protection or avoiding the sun altogether during these hours.
A:A dry climate is a region of the world where there is little precipitation and the air is very dry, according to Maps of the World. Dry climate is divided by climatologists into the subclassifications of dry arid and dry semiarid.
A:The factors that affect climate include elevation, latitude, wind, water currents and proximity to the ocean. Climate is not the same as weather. Climate is a long-term state, while weather changes constantly.
A:According to Met Office, fog forms when numerous small water droplets become suspended in the air. Fog happens most often in heavily polluted industrial areas where water can cling to the small pollution particles in the air.
A:Yung Chung-hoi of the Hong Kong Observatory explains that the sun is overhead at the equator and at a slant angle at the poles, which is why it is very hot near the equator. The other factors that influence the amount of sunshine received at different places on Earth are absorption and scattering of sunshine when passing through the atmosphere, and reflection by the surface of the Earth.
A:The rainy season in Brazil varies by location, according to Southern Explorations. Brazil is a large country, and its climate and geography vary widely from one place to the next. In most places, the rainy season and the highest amount of rainfall coincide with the Southern Hemisphere's summer.
A:A tsunami is a series of large waves that move rapidly across the water. Tsunamis are caused by landslides, volcanic eruptions and earthquakes. These waves can move across the open ocean at speeds of up to 500 miles an hour.
A:A typhoon is the same thing as a hurricane or cyclone. They are called different names depending on where they occur. Typhoons are the name used for tropical cyclones in the Northwest Pacific, specifically to the west of 180 degrees on a map, where the Japanese Meteorological Agency tracks them.