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The graph shows October ozone concentrations above Halley Bay in Antarctica between 1956 and 1998 - HSC - SSCE Chemistry - Question 10 - 2003 - Paper 1
Question 10
The graph shows October ozone concentrations above Halley Bay in Antarctica between 1956 and 1998. Based on these data alone, which of the following is a valid stat... show full transcript
Worked Solution & Example Answer:The graph shows October ozone concentrations above Halley Bay in Antarctica between 1956 and 1998 - HSC - SSCE Chemistry - Question 10 - 2003 - Paper 1
Step 1
It was greater in 1998 than in 1993.
Answer
To validate this statement, we need to refer to the graph. If the ozone concentration in 1998 is higher than in 1993, then the statement is true. Reviewing the data from the graph, we find that the ozone concentration in 1998 indeed appears higher than that in 1993.
Step 2
It will be greater in 2004 than in 1998.
Answer
This statement requires a forecast based on trends observed in the graph. Since the data only extends to 1998, we cannot definitively make this claim about 2004 based on what is visible from the graph. Thus, this statement cannot be validated.
Step 3
The variation in ozone concentration between 1960 and 1970 was due to changes in atmospheric CFC concentrations.
Answer
This statement cannot be confirmed solely based on the graph. The graph illustrates ozone levels but does not provide direct correlations to CFC concentrations. Therefore, without additional data, we cannot validate this assertion.
Step 4
The variation in ozone concentration from one year to the next is due only to changes in atmospheric CFC concentrations.
Answer
Similarly, this statement presupposes a singular cause for variations in ozone levels. The graph shows fluctuations, but attributing these solely to CFCs lacks substantiation without further scientific context. Hence, this statement cannot be validated.