®Free GED Science Practice Test

20 questions · Free Practice

Question 1 of 20
A researcher measured the heart rates of 20 male athletes and 20 female athletes before and immediately after 30 minutes of continuous strenuous exercise. The strenuous exercise included running for 15 minutes and bicycling for 15 minutes. The researcher recorded the data in the table.

Scientists are Interested in whether certain greenhouse gases have helped cause I recent temperature increases. The graph presents data on carbon dioxide and methane gas levels in the atmosphere for the past several centuries. Human activities began producing large quantities of both gases in the 1700s. This graph, combined with information from--------------------, supports ----------------------.

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Rationale

This graph, combined with information from paragraph 3, supports the anthropogenic climate change model.

The data presented in the graph correlates with the rise in greenhouse gases due to human activities, especially since the 1700s, which supports the anthropogenic climate change model that attributes recent temperature increases to human-induced emissions. A) The Milankovitch climate change model explains long-term climate changes due to Earth's orbital variations, which is not directly related to the recent human-induced increase in greenhouse gases. While this model provides valuable insights into historical climate changes, it does not support the premise that current temperature increases are primarily due to human activities, as highlighted in the question. B) This choice is correct because it refers to the relevant paragraph that likely discusses the impact of human activities on greenhouse gas levels, providing context and support for the conclusion drawn from the graph. The combination of this information reinforces the argument that human-induced emissions are a significant factor in recent climate changes. C) This choice is also correct as it describes the anthropogenic climate change model, which posits that human activities are a primary driver of recent climate changes. The evidence shown in the graph aligns with this model, making it a valid conclusion when examining the relationship between greenhouse gas levels and temperature increases. D) While paragraph 2 may provide some relevant information, it does not directly support the conclusion drawn from the graph regarding anthropogenic climate change. The specific reference to paragraph 3 is crucial for establishing the connection between human activities and greenhouse gas levels. Conclusion The combination of the graph data with information from paragraph 3 effectively supports the anthropogenic climate change model, emphasizing the role of human activities in increasing greenhouse gas levels since the 1700s. Choices A and D do not adequately address the question, while B and C provide necessary context and alignment with the evidence presented. This highlights the importance of understanding human impact on climate change through data representation.

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