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64 Cards in this Set
- Front
- Back
True or false: Ultraviolet radiation has more energy than gamma rays.
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False |
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What is the name of the scale used to measure tornado damage?
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Fujita Scale |
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What type of cloud usually forms at lower altitudes and then develops vertically?
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Cumulus |
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During the day, air along slopes is heated more intensely than air along the valley floor, resulting in air being pulled upslope. |
Valley breeze |
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Any location along a single isobar has the same:
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Pressure |
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Which type of wind occurs during the evening hours when the land cools faster than the sea?
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Land breeze |
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A cold, humid air mass: |
Maritime polar
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Water that has condensed on the ground and other objects whose temperature has dropped below the dew point. |
Dew |
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A cold front advancing on a warm front: |
Occluded front |
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True or false: Graupel and rime is the same thing. |
False |
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Which of the following optical effects involves hot air near the surface? Glory Halo Mirage Rainbow |
Mirage |
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Forces that affect wind do NOT include: |
Isobars |
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True or false: The Hurricane damage potential scale is called the Saffir-Simpson scale |
True |
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Which temperature scale has no negative temperatures? |
Kelvin |
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True or false: If a cold air mass is advancing under a warm air mass, a cold front is created. |
True |
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Which instrument is used to measure wind direction? |
Wind vane |
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A tornado watch means that: |
Conditions are right for a tornado to form |
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True or false: The dry bulb of a psychrometer measures the air temperature. |
True |
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What are the layers of the atmosphere in order from the ground up? |
Troposphere, stratosphere, mesosphere, thermosphere |
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Does melting absorb or release heat? |
Absorbs heat |
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Closely spaced isobars indicate: |
Steep pressure gradient |
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What does adiabatic mean? |
Without adding or removing heat |
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Most heat is transferred in the form of what type of electromagnetic energy? |
Infared |
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Changing from a solid to a gas is called: |
Sublimation |
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Why is the sky blue? |
Gas molecules scatter blue light more than other colors |
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Which of the following optical phenomena involves raindrops? Mirage Glory Halo Rainbow |
Rainbow |
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A method of forecasting that relies on gas laws: |
Numerical |
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Which of the following is not one of the ways man attempts to control the damaging effects of the weather? Fog dispersal Hail suppression Wind suppression Frost prevention |
Wind suppression |
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The heat index is related to: |
Temperature and humidity |
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What are the names of the 4 global ideal pressure zones? |
Polar high, subpolar low, subtropical high, equatorial low |
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Which of the following is not one of the three mechanisms of heat transfer? Radiation Conduction Absorption Convection |
Absorption |
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True or false: When air is saturated, the temperature equals the dew point. |
True |
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True or false: Hurricanes have a steeper pressure gradient than tornadoes. |
False |
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What direction does a cyclonic storm rotate? |
Counterclockwise |
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How much latent heat is released when 10 grams of water is frozen? |
800 cal |
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A psychrometer reads the dry bulb at 85F and the wet bulb at 80F. What is the relative humidity? |
90% |
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During this stage precipitation begins to fall: |
Mature |
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Updrafts stop in this stage: |
Dissipative |
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The noon Sun is directly above which location on the spring equinox? |
Equator |
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True or false: Large contrasts in temperature result in faster jet streams. |
True |
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Which cloud type is a layered cloud? |
Stratus |
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True or false: It is possible for water to remain a liquid below 0C (32F) |
True |
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Which instrument is used to measure atmospheric pressure? |
Barometer |
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What is the cloud cover? |
60-80% |
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What is the current dew point? |
45 degrees |
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Which of the following causes instability in the atmosphere? |
Forceful lifting caused by orographic lifting, frontal wedging, or convergence |
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If the air temperature is 0 degrees F and there is a 5 mph wind blowing, what is the wind chill? |
-11 degrees F |
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Even though winds are much faster in tornadoes, hurricanes cause more damage. Why? |
Hurricanes are much larger storms |
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Condensation: |
Releases heat |
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True or false: The temperature in the stratosphere decreases sharply. |
False |
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How do you read a psychrometer? |
Subtract the difference between the dry bulb and the wet bulb. Then, on the chart, find the relative humidity by tracking the dry bulb on the side and the difference between the dry and wet bulbs on the top. |
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What is the order of the electromagnetic spectrum, from lowest to highest energy? |
Radio waves, infared, ultraviolet, x-rays, gamma rays |
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When matter is changed into a more solid state, heat is: |
Released |
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When matter is changed into a more gas-like state, heat is: |
Absorbed |
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Instability in the atmosphere is enhanced by: |
intense solar heating that warms the air from below (convective lifting);
heating of an air mass from below as it passes over a warm surface; forceful lifting caused by orographic lifting, frontal wedging, or convergenceradiation; cooling from the tops of clouds |
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Stability in the atmosphere is enhanced by: |
radiation cooling of the earth’s surface after sunset;
cooling of an air mass from below as it passes over a cold surface; subsidence of an air column (subsidence is a general downward flow of air) |
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Sleet
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This is snow crystals that pass through a layer of warm air that melts them, after which they fall through a layer of freezing air. Think of them as “frozen raindrops.”
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Freezing rain |
Also known as glaze, this is rain that falls as supercooled liquid onto a surface that is below the freezing point. The surface is coated with a thin layer of ice as the rain hits and freezes.
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Hail |
These are hard, rounded pellets or irregular lumps of ice. They form in cumulonimbus clouds where updrafts are strong enough to overcome the pull of gravity on raindrops. This pushes them into sub-freezing layers of the cloud where they freeze and collect more ice.
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Rime |
These delicate “ice feathers” form into the wind on surfaces as fog passes through a sub-freezing region.
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Graupel |
Commonly called “soft hail,” graupel forms as rime collects on snow crystals.
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Rain |
Rain is generally produced by nimbostratus or cumulonimbus clouds that are often the result of snow at higher altitudes, which passes through a warm layer of air and melts.
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Snow |
The crystalline structure of ice allows snowflakes to have six sides, though there is an indefinite amount of variability possible (no two snowflakes are identical).
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How do you read a synoptic weather chart? |
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