ATSC 113 SNOW Exam Questions with 100% Correct Answers (Graded A+)

ATSC 113 SNOW Exam Questions with 100% Correct Answers (Graded A+) gradient - Answer-is a change in a property, such as temperature, over a distance Faceted crystals, or facets, - Answer-are produced when a strong vertical temperature gradient exists. The water vapour is moving quickly, and crystal growth happens quickly. The rule of thumb is that faceting takes place when the temperature gradient is larger than 1°C per 10 cm depth, or equivalently 10°C per metre. Under these conditions, snow crystals near the bottom of the snowpack (where it is warmer) can become very large and angular (Fig. 7de.3). This is also known as depth hoar. - Answer-snow crystals near the bottom of the snowpack (where it is warmer) can become very large and angular Rounded crystals, or rounds, - Answer-are produced when temperature gradients are weak, water vapour moves slowly, and crystal growth happens slowly. Typical rounding occurs when the vertical temperature gradient within the snowpack is less than 1°C per 10 cm depth, or equivalently, 10°C per metre. - rounding occurs more often in warmer, wetter, coastal climates, where cloud cover is more frequent, and the snowpack is deeper crystal metamorphism - Answer-The characteristics of these little crystals have direct implications for avalanche danger. Generally speaking, faceted crystals are weakly bonded, making the snowpack weaker and more unstable. Rounded crystals are strongly bonded, making the snowpack stronger and more stable. Deposition - Answer-occurs when a substance undergoes a phase change directly from the gas to the solid phase, without the liquid stage in between. For instance, the deposition of water is when it changes from water vapour (gas) into ice (solid) without passing through the liquid water phase. It literally deposits itself onto the snow surface. Dewpoint temperature - Answer-is the air temperature at which water vapour starts to condense into liquid droplets, while being cooled Frostpoint temperature - Answer-is the dewpoint temperature if the air is below 0°C. Instead of dew, frost forms. Surface hoar or hoarfrost or just frost - Answer-is essentially the frozen version of dew. It is produced by deposition onto the snow surface when the air temperature falls below the frostpoint temperature. The outcome is the formation of ice crystals on the top of the snow surface. What is needed for surface hoar to form? - Answer-clear night skies, calm winds, A strong temperature inversion,