New Threat to Earth’s Ozone Layer Ariella Yegudkin



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1.08 Ozone Layer Assessment-Chemistry Fierro



New Threat to Earth’s Ozone Layer
Ariella Yegudkin
3/20/22 1. What information in the article shows that the research has been subject to peer review?
Provide an example.
“In a study published June 27 in Nature Communications, the scientists report...” This shows that the study was published in a scientific journal and that other scientists were able to report on it.
2. What information about the article demonstrates its global access to other scientists?
Provide an example.
“But new research by British and American scientists suggest a chemical not controlled by the international treaty poses a potential risk to the Earth's protective ozone layer...The rapid increase in dichloromethane was revealed by long-term NOAA atmospheric measurements at sites across the globe.” The research was done by British and American scientists so people from those countries alone have more reason to look into the studies. There is global access to this information too because the measurements were taken at numerous sites. Any of those sites themselves could’ve documented the information and gave information about the paper for people interested to look at.
3. Provide two excerpts from the article that include analysis or conclusions that demonstrate logical thinking and reasoning. Explain why the examples selected demonstrate logical thinking and reasoning.
“The chemical is dichloromethane—a chlorine-based industrial solvent and paint stripper whose concentrations have been rising rapidly in the atmosphere over the past decade.”

Unlike chlorofluorocarbons (CFCs) and similar long-lived gases that are responsible for most ozone depletion, dichloromethane has a short lifetime...”
These two quotations from the text show logical thinking and reasoning because they are drawing attention to the similarities and differences between the substances that are causing rifts in the ozone layer.
4. Provide two excerpts from the article that demonstrate the rules of evidence and the scientific method were followed when creating scientific explanations. Explain why the examples selected demonstrate that the scientific method and rules of evidence were followed.


"Concentrations were decreasing slowly in the late 1990s, but reversed course and have doubled since the early 2000s."
“The rapid increase in dichloromethane was revealed by long-term NOAA atmospheric measurements at sites across the globe.”
These two excerpts from the text show rules of evidence and the scientific method were followed because they are evidence proving the claim of the article to be true. They are actual measurements taken that can be proved repeatedly because the scientific method was used. The experiments in the article can be recreated and will result in the same evidence.

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