Which of the following is true about Earth's atmosphere?
answer
The ozonosphere and ionosphere shield the surface from harmful radiation.
question
Three criteria used for classification of the atmosphere are
answer
Composition, temperature, and function.
question
Based on composition, the atmosphere is divided into
answer
Two broad classifications: hemisphere and heterosphere.
question
Based on temperature, the atmosphere is divided into
answer
Four regions: ranging from the troposphere to the thermosphere.
question
Based on function, the atmosphere has
answer
Two areas that absorb radiation from the Sun.
question
The thermosphere closely corresponds to
answer
Both the ionosphere and the heterosphere.
question
At sea level, the pressure of the atmosphere is about____ kg/cm2.
answer
1.0
question
Which of the following is true?
answer
The atmosphere exerts a force of 1 kg/cm2 i.e. 14.7 in/in2. Air molecules exert air pressure through their motion, size, and number. Air pressure decreases with increasing altitude.
question
Half of the total mass of Earth's atmosphere lies below an elevation of_____ meters.
answer
5500.
question
The outermost region of the atmosphere, based on composition, is the
answer
Heterosphere.
question
The heterosphere is the layer of the atmosphere in which the gases are____ because of____
answer
Poorly mixed; the influence of gravity which causes gases of different weight to separate into layers.
question
Which of the following is true of gases in the heterosphere?
answer
The hydrogen and helium occur at the top of the heterosphere, and the nitrogen and oxygen at the bottom.
question
The region of the atmosphere that is so evenly mixed that it behaves as if it were a single gas is
answer
Homosphere.
question
The thermopause is located
answer
Approximately 480 km (300 miles) above Earth's surface.
question
The highest temperatures in the atmosphere occur in the
answer
Thermosphere.
question
The tropopause altitude is highest____ because of the _____.
answer
At the equator; intense heating from the surface.
question
Temperatures within the stratosphere
answer
Increase with altitude because of the absorption of ultraviolet radiation.
question
The high temperature in the upper thermosphere
answer
Is more a measure of kinetic energy than sensible temperature.
question
In which two atmospheric zones does temperature increase with altitude?
answer
Stratosphere and thermosphere.
question
In which two atmospheric zones does temperature decrease with altitude?
answer
Troposphere and mesosphere.
question
Why is the hole in the ozone greatest over Antarctica?
answer
Chlorine freed from CFC's elsewhere migrate to the Antarctic region, where they are trapped by the polar vortex.
question
Which of the following is true of the ionosphere?
answer
The region principally absorbs gamma rays, x-rays, and interacts with the solar wind.
question
Which of the following lists the correct sequence of gases, from the most to least concentration, in terms of percentage within the homosphere?
The three stable (i.e. non variable) gases in the atmosphere, in order of abundance from the most to the least, are
answer
Nitrogen, oxygen, argon.
question
The two most abundant gases in the atmosphere are
answer
Nitrogen and oxygen.
question
Nitrogen (N2) is
answer
Cycled through the environment via the activity of bacteria.
question
Which of the following is true of nitrogen?
answer
The nitrogen that the human body needs is devoured from food, not the air.
question
Which of the following is true of carbon dioxide?
answer
It occurs in large amounts in the atmosphere relative to nitrogen and oxygen.
question
About half of Earth's crust consists of compounds containing
answer
Oxygen.
question
Oxygen (O2) is
answer
A by-product of photosynthesis.
question
Which stable (non variable) gas in the atmosphere is inert and unusable in life processes?
answer
Argon.
question
A by-product of photosynthesis is
answer
Oxygen.
question
Which of the gases listed below has accumulated in the atmosphere as a result of biological processes?
answer
Oxygen.
question
Which is true of the amount of CO2 in our atmosphere?
answer
The level of CO2 increased at the rate of 1.1 percent per year from 1990 to 1990.
question
Which is true of the level of CO2 in our atmosphere?
answer
It is reached 400 pm in 2013.
question
Which of the following is true regarding the depletion of the ozone in the ozonosphere?
answer
It results from chemical reactions with chlorine derived from CFCs.
question
The ozonosphere is critical to life because it
answer
Absorbs most ultraviolet wavelengths.
question
The homosphere is so called because
answer
The blend of gases is nearly uniform throughout.
question
Which of the following is true of the mesosphere?
answer
It contains clouds that are visible at night.
question
In 1974, Dr. Rowland and Dr. Molina made what observation regarding ozone (O3)?
answer
The photochemical interactions of chloroflourocarbons and O3.
question
Which of the following is true of chlorofuorocarbons?
answer
They are used in refrigeration systems. They are used to make foam products. They have been used as propellants in spray cans.
question
Which of the following is true of chlorofuorocarbons?
answer
The CFC molecules react with ultraviolet light to release chlorine which then destroys ozone.
question
The Montreal Protocol
answer
Aims to reduce and eliminate all ozone depleting substances.
question
Why is the stratospheric ozone loss a concern?
answer
Stratospheric ozone absorbs harmful ultraviolet radiation (UVB and UVC).
question
Which of the following is true of UV exposure?
answer
UVA radiation is not filtered by the ozone layer and amounts for about 95% of all UV radiation reaching Earth's surface. UV radiation varies spatially according to the season, local weather conditions, and overhead ozone depletion. UV radiation is potentially harmful and individuals should take appropriate precautions depending on the UV index.
question
Which of the following is true regarding ozone depletion in Antarctica?
answer
Maximum ozone depletion occurs during the Antarctic spring, following the development of polar stratospheric clouds in winter.
question
The atmospheric portion of the biosphere occurs in the
answer
Troposphere.
question
Which of the following is correct regarding lapse rates in the troposphere?
answer
The environmental lapse rate refers to the actual lapse rate at any particular time and may differ substantially from the normal lapse rate.
question
Which atmospheric zone supports the biosphere and is the region of principle weather activity?
answer
Tropopshere.
Haven't found what you need?
Search for quizzes and test answers now
Quizzes.studymoose.com uses cookies. By continuing you agree to our cookie policy
