Atmosphere Composition and Weather Exam WX201
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Questions and Answers

What substance is found naturally in Earth's atmosphere as a solid, liquid, and gas?

  • Carbon dioxide
  • Ozone
  • Water (correct)
  • Molecular oxygen

Which weather element consistently decreases with altitude in the atmosphere?

  • Moisture
  • Pressure
  • Temperature (correct)
  • Wind

In which layers of the atmosphere does temperature always increase with height?

  • Stratosphere and Mesosphere
  • Stratosphere and Thermosphere (correct)
  • Troposphere and Stratosphere
  • Troposphere and Mesosphere

Which gases are the most abundant in Earth's atmosphere by volume?

<p>Nitrogen and oxygen (B)</p> Signup and view all the answers

Which of the following is classified as a variable gas in Earth's atmosphere?

<p>Water vapor (B)</p> Signup and view all the answers

What effect does ozone (O3) in the stratosphere have on life?

<p>Protects life from harmful ultraviolet rays (C)</p> Signup and view all the answers

Which atmospheric layer contains most of Earth's weather phenomena?

<p>Troposphere (D)</p> Signup and view all the answers

What is the main role of ozone in the stratosphere?

<p>To filter out ultraviolet radiation (B)</p> Signup and view all the answers

What is the combined albedo of Earth and the atmosphere approximately?

<p>30 percent (A)</p> Signup and view all the answers

What process is described when atmospheric gases absorb outgoing infrared radiation?

<p>The greenhouse effect (D)</p> Signup and view all the answers

What term describes the capacity to do work on matter?

<p>Energy (C)</p> Signup and view all the answers

Which day has the fewest hours of daylight in the Northern Hemisphere?

<p>Winter solstice (D)</p> Signup and view all the answers

What prevents polar regions from becoming progressively colder despite radiating more heat than they receive?

<p>Circulation of heat by atmosphere and oceans (D)</p> Signup and view all the answers

The lag in daily temperature refers to the time lag between which two aspects?

<p>Time of maximum solar radiation and maximum temperature (A)</p> Signup and view all the answers

What is typically the daily minimum temperature associated with?

<p>Time of minimum solar radiation (B)</p> Signup and view all the answers

What effect does the release of latent heat have when polar ice melts?

<p>Heats the atmosphere (A)</p> Signup and view all the answers

Which gas is known to have doubled in concentration in the atmosphere?

<p>Nitrogen (D)</p> Signup and view all the answers

What condition does a temperature inversion describe?

<p>Temperature increases with altitude. (D)</p> Signup and view all the answers

Which statement is an indication of weather rather than climate?

<p>In Daytona Beach, the temperature is currently 53°F with light rain. (A)</p> Signup and view all the answers

What does the environmental lapse rate describe?

<p>How temperature changes with altitude. (A)</p> Signup and view all the answers

What measurement is generally used to indicate the average speed and kinetic energy of air molecules?

<p>Temperature (A)</p> Signup and view all the answers

What type of heat transfer occurs during condensation?

<p>Latent heat (D)</p> Signup and view all the answers

What determines the type and amount of radiation an object emits?

<p>The object's temperature (A)</p> Signup and view all the answers

In what part of the spectrum does the sun emit its greatest intensity of radiation?

<p>Visible portion (A)</p> Signup and view all the answers

Particles that serve as surfaces on which water vapor may condense are called _____?

<p>condensation nuclei (C)</p> Signup and view all the answers

What type of fog develops as the result of warm, moist air moving over a cold surface?

<p>Advection fog (D)</p> Signup and view all the answers

If fog is forming in Denver, Colorado, and the wind is blowing from the east, then the fog is most likely _____?

<p>radiation fog (A)</p> Signup and view all the answers

Radiation fog typically forms on _____.

<p>clear, calm nights (D)</p> Signup and view all the answers

Which of the following cloud types has significant vertical development?

<p>cumulonimbus (B)</p> Signup and view all the answers

Which statement about the position of the noonday Sun during the vernal equinox is accurate?

<p>The noonday Sun is directly overhead at the equator. (D)</p> Signup and view all the answers

If the air temperature remains constant, evaporating water into the air will ____ the dew point and ____ the relative humidity.

<p>increase; increase (B)</p> Signup and view all the answers

The partial pressure of water vapor is referred to as the ____.

<p>actual vapor pressure (B)</p> Signup and view all the answers

What is the purpose of radiational cooling?

<p>To cool the ground and air by emitting infrared energy. (A)</p> Signup and view all the answers

As the air temperature increases, the saturation vapor pressure for that air parcel will ____.

<p>increase (B)</p> Signup and view all the answers

For the most accurate determination of outdoor temperature, where should a thermometer be placed?

<p>In a shaded area. (D)</p> Signup and view all the answers

Dew is most likely to form on ____.

<p>clear, calm nights (B)</p> Signup and view all the answers

Why are summers in the Southern Hemisphere generally not warmer than those in the Northern Hemisphere?

<p>The Southern Hemisphere is predominantly covered in water. (C)</p> Signup and view all the answers

What condition represents ideal conditions for a strong radiation inversion?

<p>Clear, calm, dry, winter night. (D)</p> Signup and view all the answers

At what time of day is the relative humidity normally at a minimum?

<p>when the air temperature is highest (B)</p> Signup and view all the answers

Which of the following will increase in an unsaturated rising parcel of air that stays intact?

<p>saturation vapor pressure (B)</p> Signup and view all the answers

What does the temperature to which air must be cooled in order to become saturated refer to?

<p>Dew point temperature. (C)</p> Signup and view all the answers

Which statement correctly compares the phases of water?

<p>Molecules in liquid phase vibrate faster than in solid phase. (D)</p> Signup and view all the answers

Frost results when temperatures drop below freezing and the dew that is already on the ground ____.

<p>freezes (D)</p> Signup and view all the answers

Which cloud type is composed of ice crystals and can cause a halo to form around the Sun or the Moon?

<p>Cirrus (A)</p> Signup and view all the answers

What term describes the percentage of water vapor present in the air relative to that required for saturation?

<p>Relative humidity. (A)</p> Signup and view all the answers

Flashcards

Most abundant gases in Earth's atmosphere

Nitrogen and oxygen are the most abundant gases in Earth's atmosphere by volume.

Variable gas in atmosphere

Water vapor is considered a variable gas because its concentration in the atmosphere varies.

Substance found as solid, liquid, and gas

Water (H2O) is the only substance found naturally near Earth's surface in solid, liquid, and gaseous states.

Decreasing weather element with altitude

Atmospheric pressure decreases with increasing altitude.

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Temperature increasing layer(s)

Temperature increases with altitude in the stratosphere and thermosphere.

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Layer of weather

Almost all weather occurs in the troposphere.

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Stratospheric Ozone

Ozone (O3) in the stratosphere protects life from harmful UV rays.

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Location of most weather

The troposphere is the layer of the atmosphere where most weather phenomena occur.

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Environmental Lapse Rate

The rate at which temperature changes with altitude in the atmosphere.

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Temperature Inversion

A situation where temperature increases with altitude instead of decreasing.

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Weather vs. Climate

Weather describes short-term atmospheric conditions; climate describes long-term average conditions.

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Kinetic Energy of Air Molecules

Average speed and energy of air particles, related to temperature.

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Latent Heat

Heat energy absorbed or released during a phase change (e.g., liquid to gas).

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Radiation Wavelength & Temperature

Hotter objects emit radiation with shorter wavelengths.

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Ultraviolet Radiation

Electromagnetic radiation with wavelengths shorter than violet light.

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Solar Radiation Intensity

The sun emits most intense visible light, not ultraviolet or gamma rays.

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Earth's albedo

The percentage of incoming solar radiation reflected by Earth's surface and atmosphere.

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Radiative Equilibrium

The balance between incoming and outgoing radiation energy in the atmosphere.

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Greenhouse Effect

The process where the atmosphere traps heat radiated from Earth, warming the planet.

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Energy

The ability to do work.

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Winter Solstice

The shortest day of the year in the Northern Hemisphere.

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Daily Temperature Lag

The time delay between the maximum solar radiation and the maximum surface temperature.

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Convection

The vertical exchange of heat.

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Heat Capacity

The amount of heat needed to raise the temperature of a substance by a certain amount.

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What happens to dew point when water evaporates?

If the air temperature remains constant, evaporating water into the air will increase the dew point and decrease the relative humidity.

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Mixing Ratio

The ratio of the mass of water vapor in a given volume of air to the mass of the remaining dry air describes the mixing ratio.

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Partial Pressure of Water Vapor

The partial pressure of water vapor is called the actual vapor pressure.

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Saturation Vapor Pressure and Temperature

As air temperature increases, the saturation vapor pressure for that air parcel increases.

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When is relative humidity lowest?

The relative humidity is normally at a minimum just before sunrise.

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What happens to a rising air parcel?

In an unsaturated rising parcel of air that stays intact and does not mix with the surrounding air, relative humidity increases.

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Dew Formation

Dew is most likely to form on clear, calm nights.

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Frost Formation

Frost results when temperatures drop below freezing and the dew that is already on the ground freezes.

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Seasons and Earth Distance

The statement 'Our seasons are caused by how close the Earth is to the Sun' is false. Seasons are primarily caused by the tilt of Earth's axis, not its distance from the Sun.

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Vernal Equinox Sun

On the vernal equinox, the Sun is directly overhead at noon at the equator.

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Accurate Thermometer Placement

To get the most accurate outdoor temperature, you should place the thermometer in the shade, not in direct sunlight.

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Southern Hemisphere Summers

The statement 'Summers in the Southern Hemisphere are not warmer than summers in the Northern Hemisphere because over 80% of the Southern Hemisphere is covered with water' is false.

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States of Matter and Vibrational Speed

Molecules in the solid phase (ice) have the slowest vibrational speed, and molecules in the gaseous phase (water vapor) have the highest vibrational speeds.

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Radiational Cooling

Radiational cooling is the process of cooling that occurs when both the ground and the air above it radiate infrared energy.

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Radiation Inversion Conditions

Ideal conditions for a strong radiation inversion are a clear, calm, dry, winter night.

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Temperature for Saturation

The temperature to which air must be cooled in order to become saturated is called the dew point temperature.

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Condensation Nuclei

Tiny particles in the atmosphere that provide surfaces for water vapor to condense onto, forming cloud droplets.

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Advection Fog

Fog that forms when warm, moist air moves horizontally over a cooler surface, causing the air to cool and condense.

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Upslope Fog

Fog that forms as moist air is forced to rise along a sloping terrain, cooling and condensing as it ascends.

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Radiation Fog

Fog that forms on clear, calm nights when the ground cools rapidly and cools the air above it, causing condensation.

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Cumulonimbus Clouds

Large, towering clouds with significant vertical development, often associated with thunderstorms.

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Study Notes

Exam 1 - WX201

  • No electronic devices allowed during the exam.
  • Name must be on both the questions and the answer sheet.
  • Students must return both the questions and answer sheet to receive credit.
  • Fill in the correct circle on the answer sheet in pencil.
  • Northern Hemisphere references are assumed unless otherwise specified.

Atmosphere Composition and Properties

  • Most abundant gases in Earth's atmosphere by volume are nitrogen and oxygen.
  • Variable gas in Earth's atmosphere: water vapor.
  • Only substance found naturally in the atmosphere as a solid, liquid, and gas is water.
  • Temperature decreases as you ascend in the troposphere
  • Temperature increases in the stratosphere and thermosphere.
  • Most weather occurs in the troposphere.

Weather elements

  • Pressure decreases as you ascend.
  • Moisture (water content) in the atmosphere changes as altitude increases or decreases.

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Related Documents

WX201 Exam 1 Fall 2024 PDF

Description

Test your knowledge on the composition and properties of Earth's atmosphere as well as the elements of weather. This exam covers key concepts such as gas abundance, temperature variations with altitude, and the behavior of moisture in the atmosphere. Prepare to demonstrate your understanding of the atmospheric sciences.

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