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Hypotheses - change position and edit content

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Hypotheses - change position and edit content

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Analyses - edit content, do not change position

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Analyses - edit content, do not change position

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"CO ₂ measurements are inaccurate. The CO ₂ measurements used as evidence are taken at the top of Mount Mauna Loa Volcano in Hawaii – which doesn’t seem the best place to be measuring CO ₂!"

Is the hypothesis true or false?
False
Explain your answer, using the graph as evidence:
According to graph 5, the measurements are taken both globally and on Mauna Loa, and both are very close to each other.

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"The sun is getting hotter. Over the past few hundred years, there has been an increase in the numbers of sunspots and therefore solar irradiance, which directly correlations with global warming.”

Is the hypothesis true or false? True
Explain your answer, using the graph as evidence:
As the years go on the sun shows to be getting hotter according to the graph lines on graph 1

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"Most scientists disagree. 31,000 scientists signed a petition, stating that there is no convincing scientific evidence human’s are causing global warming.”

Is the hypothesis true or false?
False
Explain your answer, using the graph as evidence:
Most the scientists agree that Human -Caused global warming is happening but according to the graph, there is no data providing that anyone signed a petition.

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"The scientific models used to predict climate change are unreliable. Models created in the 70s have not accurately predicted temperature so far, so why would they be able to predict the future?"

Is the hypothesis true or false?
False
Explain your answer, using the graph as evidence:
Even though the prediction from the 70's is not perfectly accurate, the prediction in graph 5 was made in 2000, 30 years later, so that would mean that it could be more accurate than predictions made in the 70s.

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"CO ₂ has nothing to do with global warming. Changes in CO ₂ do not match up with changes in temperature on earth."

Is the hypothesis true or false? False
Explain your answer, using the graph as evidence: The graphs of temperature and of CO2 are correlated and have many similar peaks and troughs.

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"The earth hasn’t warmed in the last 100 years. In fact, global warming has stopped and a cooling period is beginning.”
Is the hypothesis true or false? False
Explain your answer, using the graph as evidence: From the graph, we only need to analyze the changes in temperature. From that line we can see that from 100 years ago, the temperature has increased significantly since that time.

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“The CO ₂ changes are normal! Levels of CO ₂ have changed drastically throughout history based on many different factors - the current high levels of CO ₂ just follow these natural patterns.”

Is the hypothesis true or false?
This hypothesis is false.
Explain your answer, using the graph as evidence:
This statement is false because over the years, the CO2  levels have gone up and down, the highest point before present day was at 300 ppm 300,000 years ago. Now, the current level is close to 400 ppm, which has never happened before.

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"CO ₂ is increasing naturally. There are many natural sources of CO ₂, including plant and animal respiration and volcanic eruptions. The human causes are very small compared with the natural causes"

Is the hypothesis true or false?
False
Explain your answer, using the graph as evidence:
According to graph 4, human causes have a higher contribution to climate change than natural causes.

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“Global warming is caused by Volcanic activity. It’s outside of our human control, so we should just enjoy life and not worry about it!"

Is the hypothesis true or false?
False
Explain your answer, using the graph as evidence:
According to Graph 9, there is no human activity on the graph, and thus we cannot conclude if humans do or do not contribute to global warming. Also, the changes in temperature and volcanic activity do not have the same trend, for the change in temperature increases over time, but the changes in volcanic activity fluctuates over time.

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“The temperature change is caused by Cosmic Rays, not humans! There is a high correlation between the number of cosmic rays (produced by the sun) and the temperature on earth.”

Is the hypothesis true or false? False
Explain your answer, using the graph as evidence: Although cosmic rays cause more than the average in the last 40 years, humans are not measured on the graph for the amount of temperature change so there is no way to tell whether the analysis is true or false. Also, as cosmic rays increases, the average global temperature decreases, thus not contributing to global warming.

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Independent Variable: Time (years)

Dependent Variables: number of cosmic rays, average global temperature

How do the trends of the two dependent variables compare? They both have patterns with many peaks and troughs, although as time goes on, the number of cosmic rays starts to increase exponentially in the red line.

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Independent Variable: time (year)

Dependent Variables: Changes in temperature, Changes in Volcanic activity

How do the trends of the two dependent variables compare? As time increases, the changes in temperature increases almost steadily, where the changes in Volcanic activity fluctuate.

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Independent Variable: Time (years)

Dependent Variables: Temperature changes predicted by a scientific model in 2000, observed temperature

How do the trends of the two dependent variables compare? The black line is more linear than the red line, although it does still have a few peaks and troughs. The red line is constantly in flux with many peaks and troughs.

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Pie Chart:

What overall trend does the pie chart show? __How many scientific articles(published from 1992 to 2012 this also shows that Human-caused global warming is happening.

Line Graph:

Independent Variable: expertise in climate science

Dependent Variable: % who agree that global warming us human-caused_

What overall trend does the graph show? _a graph comparing expertise in climate science with agreement that global warming is human-caused ____

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Independent Variable: Time

Dependent Variables: Changes in Temperature, Changes in Solar Irradiance

How do the trends of the two dependent variables compare? The blue line shows a lower change in solar irradiance than the higher changes in temperature shown by the red line.

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Independent Variable: Time(Years)

Dependent Variables: Global CO2, Mauna Loa CO2

How do the trends of the two dependent variables compare?  the atmospheric carbon dioxide is following the same line as the time.

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Independent Variable: contribution to global warming

Dependent Variable: % of warming effect caused by this contribution

What overall trend does the graph show in the % contribution to global warming based on the difference between human causes and natural causes? That both of the trends are non-linear, but human contribution out weighs the natural causes.

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Independent Variable: Atmospheric Carbon Dioxide Levels (ppm)

Dependent Variable: Time (years before present)

What overall trend does the graph show? A pattern with many peaks and troughs

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Independent Variable: Temperature

Dependent Variables: Co2, Temperature

How do the trends of the two dependent variables compare? As time increases, both CO2 and temperature are at a constant state of flux.

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Independent Variable: Time(Year)

Dependent Variable: Temperature change (C)

What overall trend does the graph show? A graphed out pattern on how the temperature will rise depending on the time

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