ERAU WX 201

ERAU WX-201 Test 1 with correct Answers Graded A+ Lapse rate The rate at which temperature decreases with an increase in altitude. Wind direction the direction from which the wind is blowing a variable gas in the Earth's atmosphere is water vapor Troposhere The atmosphere layer closest to Earths surface in which we live Air molecules are held near the earth's surface by ____. Gravity The Temperature of the tropopause is much _____ than the temperature at Earth's...

Exam 2, WX 201 Questions and Answers Graded A+ The heat index (HI) is used by the National Weather Service, and combines ____ with ____ to determine an apparent temperature. - dew point temperature; mixing ratio - air temperature; specific humidity - actual vapor pressure; specific humidity - air temperature; relative humidity - mixing ratio; saturation vapor pressure air temperature; relative humidity The initial stage of an ordinary thunderstorm is the - dissipating stage - m...

Quiz 1 WX 201 with correct Answers Graded A+ At night, when the weather is extremely cold and dry, atmospheric pressure in the trophosphere - increases with increasing altitude. - remains constant with increasing altitude. - stays the same, then drops suddenly. - first increases, then decreases with increasing altitude. - decreases with increasing altitude. decreases with increasing altitude. Which of the following is MOST likely associated with fair weather? - a cold front - ...

Weather Exam 2- WX 201 ERAU Questions and Answers Radar Reflectivity The amount of energy received by the radar that is scattered back to it, usually by precipitation particles Attenuation Reduction of radar power by absorption of radiation by targets WSR-88D Weather Surveillance Radar 1988 Doppler dopplar radar specialized radar that can detect precipitation and movement of small particles and can approximate wind speed Aircraft Radar Low power(300-500w), 3cm wavelengt...

WX 201 - Exam #1 Questions and Answers Permanent Gases in the Atmosphere Constant concentration in the atmosphere 78% Nitrogen, 21% Oxygen, 1% Other Gases: Argon, Neon, Helium, Krypton, Hydrogen Variable Gases in the Atmosphere The amount/concentration in the atmosphere varies or changes Includes: Water Vapor, Carbon Dioxide, Methane, and Ozone Sources produce gases Ex: decaying plants/animals, volcanoes, photosynthesis Sinks deplete (remove) gases Ex: soil bacteria, resp...

WX 201 - Exam 1 Questions and Answers Nitrogen and Oxygen The most abundant gases in the earth's atmosphere by volume are... Water vapor Which of the following is considered a variable gas in Earth's atmosphere? Water The only substance near Earth's surface that is found naturally in the current atmosphere as a solid, liquid, and a gas is... Pressure Which weather element ALWAYS decreases as we climb upward in the atmosphere? Air temperature The Earth's atmosphere ...

WX 201 - Exam 2 Chapter 6-10 Questions and Answers The elevation where clouds form is called ____ level. condensation If the environmental lapse rate is 5 ° C per 1,000 m and the temperature at Earth's surface is 25 ° C, then the air temperature at 2,000 m above the ground is 15°C. What transfers heat upward into the atmosphere? thermals Just above cumulus clouds, you would expect to find a stable layer. If an air parcel is given a small push upward and it falls back...

WX 201 - Exam 2 Questions and Answers The subtropical jet stream is usually found between ________. 20 degrees to 30 degrees latitude, 200-mb level The summer monsoon in eastern and southern Asia is characterized by ________. wet weather and winds blowing from sea to land The wind around a surface high pressure center in the Northern Hemisphere, blows _______ and outward from the center. clockwise Both the polar front jet stream and the subtropical jet stream are found at whic...

WX 201 Chapter 2 Exam with correct Answers The amount of heat energy required to bring about a small change in temperature in a substance is called the heat capacity. Sunlight that bounces off a surface is said to be ____ from the surface. reflected The temperature of a rising air parcel always cools due to expansion. The horizontal transport of any atmospheric property by the wind is called advection When water changes from a liquid to a vapor, we call this process eva...

WX 201 Chapter 3 Sandbox Exam Questions and Answers When a liquid thermometer is held in in the shade, it will: accurately measure the air temperature. The maximum in daytime surface temperature typically occurs before Earth receives its most intense solar radiation. False When in danger of a hard freeze, citrus farmers often spray a mist of water that will freeze and create a protective coating of ice over the fruit. True In July, at middle latitudes in the Northern Hemispher...