Ozone Layer Flashcards
What is the primary function of the ozone layer?
To absorb the majority of the sun’s harmful ultraviolet (UV) radiation.
True or False: The ozone layer is located in the troposphere.
False
What layer of the atmosphere contains the ozone layer?
Stratosphere
Fill in the blank: The ozone layer is crucial for protecting life on Earth from _____ radiation.
ultraviolet (UV)
Which gases are primarily responsible for ozone depletion?
Chlorofluorocarbons (CFCs)
What international agreement aimed to phase out the use of ozone-depleting substances?
Montreal Protocol
Multiple Choice: What is the main consequence of ozone layer depletion?
Increased UV radiation reaching the Earth’s surface.
True or False: The ozone layer can regenerate itself over time.
True
What year did the Montreal Protocol come into effect?
1989
Short Answer: Name one health risk associated with increased UV radiation.
Skin cancer
Fill in the blank: Ozone is a molecule composed of three _____ atoms.
oxygen
What is the measurement unit commonly used to express the thickness of the ozone layer?
Dobson units
Multiple Choice: Which of the following is NOT an effect of UV radiation?
Improved plant growth
True or False: The ozone layer is consistent in thickness across the globe.
False
What phenomenon is characterized by a seasonal decrease in ozone concentration over Antarctica?
Ozone hole
Short Answer: What human activities have contributed to ozone layer depletion?
Use of CFCs and other ozone-depleting chemicals
Fill in the blank: The ozone layer is typically found at altitudes of _____ to _____ kilometers.
15 to 35
Multiple Choice: Which of the following is a natural source of ozone?
Photochemical reactions in the atmosphere
True or False: The ozone layer is uniform in its composition.
False
What is the effect of ozone depletion on marine ecosystems?
It can harm phytoplankton, which are foundational to marine food webs.
Short Answer: How does increased UV radiation affect animals?
It can lead to eye damage and weakened immune systems.
Fill in the blank: The ozone layer is usually thicker in the _____ regions.
tropical
What chemical reaction leads to the destruction of ozone in the stratosphere?
Catalytic reactions involving chlorine and bromine.
Multiple Choice: Which of the following is a consequence of the ozone layer being depleted?
Increased skin cancer rates
True or False: The ozone layer protects against all types of radiation.
False
What role do polar stratospheric clouds play in ozone depletion?
They provide a surface for reactions that lead to ozone destruction.
Short Answer: Name a common product that historically contained CFCs.
Aerosol sprays
