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Exam 2 answers
Terms in this set (50)
What are the six ways water can change state?
You have 10 g of water at 5C. You apply 20 calories of heat to the water. What will the final temperature of the water be after all 20 calories of heat have been absorbed by the water?
the water frozen on the tree releases heat into the tree that keeps it at at least 32F.
Why does water freezing on an orange tree help to keep it above freezing even if the surrounding air temperature drops into the 20s?
600; released into
When water vapor turns into liquid water [80, 100, 300, 600] calories of heat are [absorbed from, released into] the atmosphere.
680; absorbed from
When ice turns directly into water vapor [80, 180, 380, 680] calories of heat are [absorbed from, released into] the atmosphere.
T or F: Warm air not only can have more water vapor, it ALWAYS contains more water vapor than cold air.
The mixing ratio is 5g/kg, and the relative humidity is 50%. What is the saturation mixing ratio?
T or F: When the temperature goes up, the relative humidity usually goes down.
An air bubble at the surface has a temperature of 30C. It rises and remains unsaturated all the way up to 3 kilometers above the ground. What is the temperature of the air bubble at 3 km?
1. frontal lifting
2. orographic lifting
List two different ways air bubbles can be forced to rise.
A rising air bubble is warmer than its environment. In this situation we say that the atmosphere is ______ with respect to this air bubble, and therefore the air bubble will ______.
temperature inversion (gets warmer with height)
You see smoke rising in the air, and then it suddenly stops and flattens out. What is likely to be present in the atmosphere where the smoke flattens out?
The tops of thunderstorms tend to flatten out when they strike the [mesopause, stratopause, thermopause, tropopause].
all rising air bubbles cool, and humidity increases
Why do rising air bubbles, and not sinking air bubbles, have the best chance to develop into clouds?
Tiny particles in the air that allow water vapor to collect and to stick to one another forming tiny little water droplets are called [condensation nuclei, freezing nuclei, adiabatic nuclei, saturation points].
What does the relative humidity of a rising air bubble usually have to be in order for a cloud to form?
they're made of tiny water droplets
If clouds weigh thousands of tons each, how is it possible for them to float in the air?
A cotton ball-like cloud located in the MIDDLE levels of the atmosphere would be called [cirrocumulus, altocumulus, nimbostratus, cirrostratus].
There is a halo around the sun. What kind of clouds produce this effect? [cirrostratus, altostratus, nimbostratus, cumulonimbus]
At the top of a flattened thunderstorm, you see a big cumulus cloud that continues to rise above the anvil top. What is this called? [hypercloud, overshooting top, stratobreaker, capbuster]
These clouds are sometimes mistaken for UFO's: [cumulus, lenticular, cirrus, fractus]
Nearly saturated air rises up the side of a mountain slope and instantly forms fog. What type of fog is this? [advection, steam, upslope, radiation]
Warm moist air flows over a cold snow field and instantly forms fog. What type of fog is this? [advection, steam, upslope, radiation]
What happens to a liquid water drop when it is next to but NOT touching an ice crystal? The water droplet will [evaporate, freeze, become larger, quickly move away].
What do we call liquid water that is below 32F?
T or F: In order for the Collision-Coalescence process to work, it is very important for there to be roughly equal numbers of water droplets and ice crystals in the cloud.
At what temperature do most freezing nuclei activate? [0C, -5C, -10C, -15C]?
all of the above
A snowflake falling through a cloud gets covered in ice. We call this precipitation type [snow pellets, soft hail, graupel, all of the above].
T or F: Sleet usually forms when a snowflake completely melts in the atmosphere and then refreezes in midair hitting the ground as a little round ball of ice.
Fog forms, and the temperature is 25F. When the fog clears, you notice everything is coated in feathery ice crystals. You are looking at [sleet, freezing rain, rime, glaze].
The process in which rain is produced by having supercooled water AND ice crystals next to each other at the same time is called the ________ Process.
In order for a droplet of water to be considered a raindrop it must be at least ____mm
Precipitation that evaporates before reaching the ground is called [fog, virga, mist, drizzle]
An ice storm has hit Dallas. What kind of precipitation is responsible for most of the damage? [snow pellets, soft hail, graupel, freezing rain]
T or F: Hail forms when huge falling raindrops freeze solid in midair just before they hit the ground.
It pushes the rising warm air to the ground
Describe how using a large wind machine can prevent frosty temperatures from developing near the surface of the Earth
T or F: Bacteria can sometimes serve as Condensation Nuclei.
[Hygroscopic, hydrophobic] nuclei are the most effective condensation nuclei because water is readily attracted to these tiny particles, and thus water vapor condenses onto them very easily.
In order to be classified as a HIGH CLOUD, the base of the cloud must be at least [1000, 2000, 5000, 6000] meters above the ground.
These clouds often produce the so-called "Mackerel Sky" which yield beautiful sunrises and sunsets. The type of cloud in a Mackerel Sky is called [altostratus, cirrocumulus, stratus, cumulus].
What word is added to a cloud name that lets us know that there is precipitation falling from it?
They sky is completely covered with a dull, gray cloud with no precipitation. What cloud type are you looking at? [cirrus, cumulus, stratus, mammatus]
Sometimes dramatic pouches of cloud material can be seen protruding down from the anvil of a cumulonimbus cloud. These clouds are called [mammatus, cirrus, unicus, fractus]
The skies are clear, the winds are light, and the air is very close to saturation. What type of fog is likely to occur very soon?
T or F: The width of a human hair is often larger than the typical condensation nuclei.
If there are no freezing nuclei present in a water droplet, at what temperature must that water droplet be in order to turn to ice? [0C, 32F, -40C, -100C]
T or F: When solid ice at 0C changes into liquid water, the temperature increases slightly to 0.1C during the phase change.
The relative humidity is 100%. In the next hour, the air temperatures gets much warmer. What is the most likely change to the relative humidity?
T or F: It is possible for water to evaporate when the relative humidity is 100% but only if an equal number of water molecules condense.
The temperature at which air must be cooled in order to see some form of condensation take place is called the [frost point, dew point, adiabatic, water critical] temperature.
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