Lesson 11.3: Conflicting Viewpoints Passages

Introduction

In the ACT Science section, you may encounter passages that present conflicting viewpoints. These passages involve two or more competing hypotheses or theories about a phenomenon, providing you with an opportunity to analyze and compare different scientific perspectives. Understanding how to track claims, evidence, and the assumptions underlying each viewpoint is critical. This lesson will delve into the strategies you can employ when faced with conflicting viewpoints, enabling you to summarize and contrast the competing scientific arguments effectively.

Learning Objectives

By the end of this lesson, students should be able to:

1. Identify two or more competing hypotheses or theories on one phenomenon.
2. Track and evaluate each viewpoint's claims and the evidence they accept.
3. Summarize and contrast competing scientific viewpoints.
4. Answer questions regarding agreement, disagreement, and supporting evidence.
5. Understand the main ideas and terminology related to conflicting viewpoints passages.

Understanding Conflicting Viewpoints Passages

Conflicting viewpoints passages typically present a situation where scientific interpretations differ. They may introduce hypotheses that explain a particular phenomenon, showing the debate between different ideas. Recognizing the structure of these passages is crucial in navigating them. Here are the key components:

1. Competing Hypotheses: These are different explanations for the same observed phenomenon. Each hypothesis comes with its claims and supporting evidence.
2. Claims and Evidence: For each viewpoint presented, claims are the positions taken by the hypothesis, while evidence includes data, experiments, or observations that support those claims.
3. Conclusion and Comparison: It is essential to summarize the major points of agreement and disagreement among the viewpoints and evaluate the strengths and weaknesses of each argument.

Example of Conflicting Viewpoints

Consider a passage discussing the effects of a new pesticide. Hypothesis A argues that the pesticide increases crop yield without harming beneficial insects, while Hypothesis B claims that the pesticide severely affects bee populations, leading to long-term ecological damage.

Hypothesis A:

• Claim: The pesticide increases crop yield.
• Evidence: Studies showing a 20% increase in yield compared to untreated fields over two growing seasons.

Hypothesis B:

• Claim: The pesticide harms bee populations.
• Evidence: Research indicating a significant decline in bee populations in areas where the pesticide is extensively used, correlating with reduced pollination rates.

To analyze this passage:

1. Identify the claims made by both hypotheses.
2. Examine the evidence provided for each claim.
3. Consider the implications of accepting each viewpoint. For example, if Hypothesis A is correct, what does that imply for agricultural practices? If Hypothesis B is true, what should be the focus of environmental regulations?

Strategies for Handling Conflicting Viewpoints

When faced with conflicting viewpoints on the ACT, here are some strategies to apply:

1. Read Actively: As you read, mark key terms and phrases that indicate claims and supporting evidence. Pay attention to contrasts between viewpoints (e.g., “in contrast,” “however,” “on the other hand”).
2. Summarize Each Viewpoint: After reading, state the main claim and supporting evidence for each hypothesis in your own words. This helps clarify your understanding and memory.
3. Create Comparisons: Make a table or two-column notes that list similarities and differences between the viewpoints and their evidence.
4. Check for Bias: Consider any potential bias in how the passage presents the hypotheses. Is one viewpoint favored over the other? Why might that matter?
5. Practice with Sample Questions: Familiarize yourself with typical question types associated with conflicting viewpoints passages, which may ask you to determine which viewpoint supports certain evidence or identifies an assumption made by a viewpoint.

Worked Example

Assume you encounter a passage with two competing models explaining climate change:

Model A claims human activity is the primary driver, while Model B posits that natural cycles are more responsible for recent changes.

Questions You Might Encounter:

1. Which model suggests that the increase in CO2 levels is directly linked to industrial activity?
2. What evidence does Model B provide concerning historic climate patterns?
3. How might the conclusions drawn from these models influence climate policy?

Conclusions and Answer Strategies

After studying conflicting viewpoints passages, students should be skilled at identifying the main claims and distinguishing between the evidence presented. When answering questions:

1. Look for keywords that connect claims and evidence.
2. Evaluate the logic of claims based on the evidence provided.
3. Consider what other data might alter the interpretation of a viewpoint.

By developing these skills, you will be better prepared to confront the complexity of scientific discussions, which often reflect the dynamism of ongoing research and debate in the scientific community.

Study Notes

• Conflicting viewpoints passages feature two or more hypotheses on the same phenomenon.
• Carefully track each viewpoint’s claims and supporting evidence.
• Summarize and compare different scientific arguments.
• Focus on the implications of each viewpoint in real-world contexts.
• Practice applying strategies like summarizing, comparing, and evaluating biases in passages.
• Familiarize with the question formats specific to conflicting viewpoints passages to answer efficiently during the ACT Science section.