13-Year-Old Science Worksheet: How New Evidence Changes Scientific Knowledge — Multidisciplinary Teams, Ethics & Science Communication

Instructions

1. Read through each section carefully. The worksheet is designed to explore how scientific ideas grow and change.
2. Complete the activities in each section. You will be analysing scenarios, filling in tables, and answering questions.
3. Think critically. There are often no single "right" answers for the open-ended questions. Use evidence and reasoning to support your ideas.
4. Attempt the optional Challenge Question at the end if you want to stretch your thinking further.
5. Once you are finished, you can check your work against the Answer Key at the end.

Section 1: When a Planet Isn't a Planet Anymore

For over 70 years, everyone learned that our solar system had nine planets. The ninth planet was Pluto. But in 2006, scientists decided Pluto was no longer a major planet and reclassified it as a "dwarf planet." This happened because new, more powerful telescopes allowed us to see more of the outer solar system. Scientists discovered many other objects similar in size and orbit to Pluto in an area called the Kuiper Belt. This new evidence forced them to rethink the very definition of a "planet."

1. What was the new evidence that led scientists to reconsider Pluto's status as a planet?
   
   


2. Based on the Pluto story, why is it a good thing that scientific knowledge can change? What would happen if scientific ideas could never be updated?
   
   

Section 2: Build Your Dream Team to Power a City

Imagine your city has decided to build a huge new solar power farm to generate clean electricity. This is a massive project that requires many different kinds of experts. No single person has all the answers.

Your Task: You are in charge of putting together a small, multidisciplinary team of four experts to lead this project. Choose your four essential team members from the list below and explain why each one is crucial for success.

1. My Dream Team:
   • Expert 1:
     Justification:
   
   
   • Expert 2:
     Justification:
   
   
   • Expert 3:
     Justification:
   
   
   • Expert 4:
     Justification:


2. Different experts can have different priorities. What potential disagreement could arise between the Wildlife Biologist and the Materials Engineer on your team? How could they work together to find a solution?
   
   

Section 3: Weighing the Consequences

Every major scientific or technological project has wide-ranging effects. To make good decisions, we must consider four key areas: Economic (money and jobs), Environmental (nature and ecosystems), Social (people and communities), and Ethical (what is right and fair).

Scenario: Your coastal town is considering building a large offshore wind farm to generate electricity. This will replace the old, polluting coal power plant that currently employs many local people.

Your Task: In the table below, list one potential positive consequence and one potential negative consequence for each of the four areas.

Section 4: The Science of Communication

How scientific information is shared with the public and with leaders is incredibly important. The same information can be presented in different ways, leading to very different reactions and decisions.

Scenario: A new scientific study finds that a particular pesticide used in farming might harm bee populations, but it also increases crop yield by 20%, which helps keep food prices low.

Your Task: Analyse the two different news headlines below, which are based on the same study.

1. How might a reader's opinion be shaped differently by Headline A compared to Headline B?
   
   


2. Imagine you are a government official responsible for food safety and environmental protection. Which headline would make it harder for you to make a balanced policy decision, and why?
   
   


3. Your turn to be a science communicator! Write a short, clear, and balanced public statement (like a Tweet, max 280 characters) that accurately summarizes the pesticide study's findings.
   
   

Challenge Question (Optional)

Think about the development of genetically modified (GM) foods. Briefly describe one ethical consideration and one economic consideration related to GM crops. How has science communication (e.g., news, advertising, labels) shaped public opinion about them?

Answer Key

Section 1: When a Planet Isn't a Planet Anymore

1. New evidence: Scientists discovered other objects in the outer solar system (in the Kuiper Belt) that were similar in size and orbit to Pluto. This meant Pluto wasn't as unique as they once thought, leading them to create a stricter definition for a planet.
2. Why change is good: It allows our knowledge to become more accurate and complete as we get new information and better technology. If ideas couldn't be updated, science would be stuck with incorrect or incomplete theories, and we would not be able to make progress.

Section 2: Build Your Dream Team to Power a City

1. My Dream Team (Example Answers):
   • Expert 1: Materials Engineer. To design and choose the most efficient and durable solar panels.
   • Expert 2: Economist. To figure out if the project is affordable, how to fund it, and what the impact on electricity prices will be.
   • Expert 3: City Planner. To determine the best location for the farm that doesn't interfere with housing, traffic, or future city growth.
   • Expert 4: Wildlife Biologist. To study the impact on local animals and ecosystems and find ways to minimize harm.
   (Note: Many combinations are valid if well-justified. A Lawyer could manage permits, a Sociologist could study community impact, etc.)
2. Potential Disagreement: The Materials Engineer might want to use a specific type of reflective coating on the panels for maximum efficiency. However, the Wildlife Biologist might point out that this coating disorients migrating birds. Solution: They could work together to research and test alternative coatings that are still efficient but less harmful to wildlife, or they could develop strategies like using deterrent sounds or visual markers to guide birds away from the area.

Section 3: Weighing the Consequences

(Example answers; other valid points are acceptable)

Section 4: The Science of Communication

1. Headline A uses emotional language ("Killer," "Annihilates") to create fear and anger, likely making a reader strongly against the pesticide. Headline B presents the issue as a complex problem with two sides, encouraging the reader to think about the trade-offs.
2. Headline A would make it harder. It creates public pressure to ban the pesticide immediately, without considering the economic impact on farmers and food prices. It oversimplifies the issue and promotes a reactive, rather than a thoughtful, policy decision.
3. Example Tweet: "New study: A common pesticide boosts crop yields, helping food costs, but also poses a risk to bee populations. Balancing food production and protecting our pollinators is a key challenge for regulators. #Science #Environment"

Challenge Question (Optional)

Example Answer: For GM foods, an ethical consideration is whether it is right to alter the genetics of a living organism and whether consumers have a right to know if their food is genetically modified. An economic consideration is that GM seeds can be patented, meaning large companies can control the food supply and smaller farmers may not be able to afford them. Science communication has been crucial; terms like "Frankenfood" create public fear, while industry advertising highlights benefits like higher yields and better nutrition. Food labeling policies are a direct result of this public debate shaped by communication.