Ozone Answers

How do chlorofluorocarbons (CFCs) contribute to ozone depletion?a.chlorine atom (Cl) breaks apart the ozone moleculeb.CFCs build up and block the filtering effects of the ozone layerc.chlorine atom (Cl) bonds to the ozone molecule and changes its chemical propertiesd.breaks off an oxygen atom (O) and attaches it to a hydroxide ion (OH) to form water

How is good (stratospheric) ozone formed?a.combining an oxygen molecule (O2) an atom of chlorine (Cl)b.combining a single oxygen atom (O) with an oxygen molecule (O2)c.combining two single oxygen atoms d.breaking apart an oxygen molecule

The ozone layer helps to sustain terrestrial life by __________.a.absorbing incoming UV radiationb.keeping levels of ozone in the troposphere lowc.maintaining the Earth's temperature structured.all of the above

The environmental and health risks associated with ground-level ozone are greater than the environmental and health risks associated with the depletion of the ozone layer.

Over 95% of incoming UV-B radiation is absorbed in the stratosphere. Please select the best answer from the choices provided

Which of the following is a health risk associated with ground-level ozone?a.cataractsb.skin cancerc.respiratory illnessd.all of the above

Halons contain halogens, which are highly reactive with oxygen.

How does the ozone layer affect life on Earth?a.causes respiratory illnessb.increases photosynthesis in plantsc.causes damage to living tissued.filters out harmful ultraviolet radiation

The troposphere contains 90% of the ozone in the atmosphere.

How are individual atoms of oxygen formed in the stratosphere?a.Individual oxygen atoms are formed when oxygen molecules collide with each other.b.Individual oxygen atoms are formed in the sun.c.Individual oxygen atoms are formed during photosynthesis.d.Individual oxygen atoms are formed when UV rays strike oxygen molecules.