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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: Bother trends seem to stay the same throughout so it does in fact look like a good place to take CO2 levels because it is pretty much the same as the global CO2

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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: Solar irradiance is growing and the temperature is starting to get hotter and stay the same heat.

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

Is the hypothesis true or false? false
Explain your answer, using the graph as evidence: The graph is showing a large number of people agreeing that it is human-caused

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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: The predictions and the observed temperatures are very similar and technology has improved a lot since 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 graph shows that both lines and both variables seem to be the stay thesame.

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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: The changes in temperature (in red) increase throughout the years.

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

Is the hypothesis true or false? true
Explain your answer, using the graph as evidence: We see that that the atmospheric carbon dioxide level spike then come back down in cycles that repeat about every 100,000 years.

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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: There are many more human causes than natural causes, showing that there is an increase of CO 2 in the past 70 years is not fully natural.

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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: We see that the change in temperature does not line up with the changes in volcanic activity, hence global warming is not caused by volcanic activity.

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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: The temperature change is caused by both Cosmic Rays and humans, because on the graph both Cosmic Ray and Global temp are increasing meaning they are both cause temperature changing.

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Independent Variable: Time (year)

Dependent Variables: Number of cosmic Rays, Average global temp

How do the trends of the two dependent variables compare? Red: nonlinear, decreasing at the beginning and increase at the end Blue: nonlinear, decreasing at the beginning and increase at the middle and decreasing at the end

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Independent Variable: Time (year)

Dependent Variables: Changes in Temperatures, Change in Volcanic Activity.

How do the trends of the two dependent variables compare? Changes in temperature are increasing while the changes in volcanic activity are cycles.

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Independent Variable: time year

Dependent Variables: temperature change, observed temperatures

How do the trends of the two dependent variables compare? they are somewhat similar trends increasing and then decreasing

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Pie Chart:

What overall trend does the pie chart show? more people are agreeing that global warming is happening

Line Graph:

Independent Variable: expertise in climate science

Dependent Variable: % that agree global warming is human-caused

What overall trend does the graph show? non linear increasing

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Independent Variable: Time (years)

Dependent Variables: Changes in Temperature, Changes in solar irradiance

How do the trends of the two dependent variables compare?: red: nonlinear increasing blue: nonlinear increasing at the beginning but decreasing at the end

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Independent Variable: Time (years)

Dependent Variables: Atmospheric Carbon Dioxide Levels (ppm)

How do the trends of the two dependent variables compare?: Increasing linear

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Independent Variable: Contribution to global warming

Dependent Variable: % of the warming effect caused by this contributor.

What overall trend does the graph shown in the % contribution to global warming based on the difference between human causes and natural causes? There are far more human causes rather than natural causes.

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Independent Variable: _Time( years before present)

Dependent Variable: Atmospheric Carbon dioxide levels( ppm)

What overall trend does the graph show? Cycles, the cycle repeats about every 100,000 years.

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Independent Variable: Time (years before present)

Dependent Variables: Temperature, CO2

How do the trends of the two dependent variables compare? pretty equal

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Independent Variable: Time (year)

Dependent Variable: Temperature change (c)

What overall trend does the graph show? Increasing linear

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