Science · Year 6 · Science as a Human Endeavor · Term 3

Famous Scientific Discoveries

Investigating how historical breakthroughs have changed our understanding of the world.

• ACARA Content Descriptions
• AC9S6H01

About This Topic

Scientific discoveries are not just 'eureka' moments; they are the result of curiosity, observation, and the willingness to change one's mind when new evidence appears. In Year 6, students investigate historical breakthroughs, from the discovery of penicillin to the development of the telescope, and how they have changed our world. This is a key part of the ACARA Science as a Human Endeavor strand.

Students will learn that science is a collaborative and ongoing process. They will also explore the contributions of diverse scientists, including the deep ecological and astronomical knowledge of First Nations Australians, which has been developed over tens of thousands of years. This topic comes alive when students can role-play as famous scientists or participate in 'mock conferences' to present 'new' evidence.

Key Questions

1. Analyze how the invention of the microscope fundamentally altered our comprehension of disease.
2. Justify why established scientific theories are subject to revision when new evidence emerges.
3. Evaluate the essential role of curiosity in driving the process of scientific discovery.

Learning Objectives

• Analyze how the invention of the microscope changed the understanding of microscopic organisms and disease.
• Explain the process by which new scientific evidence can lead to the revision of established theories.
• Evaluate the role of curiosity in driving scientific inquiry and discovery.
• Compare the impact of two different historical scientific discoveries on society.
• Synthesize information about a historical scientific discovery to present its significance.

Before You Start

Observation and Recording Data

Why: Students need to be able to make careful observations and record them accurately to understand the foundation of scientific discovery.

Basic Properties of Living Things

Why: Understanding what constitutes life provides context for discoveries made through microscopy, such as cells and microorganisms.

Key Vocabulary

Microscope	An instrument used to see objects that are too small to be seen with the naked eye, revealing a hidden world of cells and microorganisms.
Theory	A well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment.
Evidence	Information or facts that support a claim or hypothesis, crucial for validating or challenging scientific ideas.
Curiosity	A strong desire to know or learn something, serving as a primary motivator for scientific exploration and questioning.
Discovery	The act of finding something that was previously unknown or unrecognized, often leading to significant changes in knowledge or technology.

Watch Out for These Misconceptions

Common Misconception

Science is 'finished' and we know everything now.

What to Teach Instead

Students often think of science as a book of facts. Use peer discussion about recent discoveries (like new species or space data) to show that science is a living process where our understanding is always being updated.

Common Misconception

Discoveries are always made by one lone genius.

What to Teach Instead

The 'lone scientist' myth is common. Collaborative research tasks can help students see that most breakthroughs happen through teamwork, sharing data, and building on the work of people who came before.

Active Learning Ideas

Role Play: The Great Debate

Students take on the roles of historical figures (e.g., Galileo and the church leaders of his time). They must debate whether the Earth or the Sun is at the center of the solar system, using only the evidence available at that time.

45 min·Whole Class

Gallery Walk: Discovery Timeline

Groups research a specific discovery (e.g., vaccines, electricity, the structure of DNA) and create a poster showing what people believed *before* and *after* the discovery. The class moves through the timeline to see how knowledge builds over time.

40 min·Small Groups

Think-Pair-Share: The Next Big Thing

Students think about a problem in the world today (like plastic waste) and imagine a scientific discovery that could solve it. They pair up to discuss what kind of evidence they would need to prove their discovery works.

20 min·Pairs

Real-World Connections

• Medical researchers at institutions like the Walter and Eliza Hall Institute use advanced microscopes to study viruses and bacteria, leading to the development of new vaccines and treatments for diseases like influenza and tuberculosis.
• Astrophysicists at the CSIRO Parkes Observatory analyze data from radio telescopes, which are modern descendants of early telescopes, to discover new celestial objects and understand the universe's origins.
• Forensic scientists use specialized equipment, including microscopes, to examine evidence at crime scenes, helping to solve complex cases by identifying trace materials or biological samples.

Assessment Ideas

Exit Ticket

Provide students with a card asking: 'Name one scientific discovery and explain how it changed our understanding of the world. What was one question that led to this discovery?'

Discussion Prompt

Pose the question: 'Imagine you discover something completely new in science. What steps would you take to convince other scientists that your discovery is valid?' Encourage students to discuss the importance of evidence and peer review.

Quick Check

Display images of historical scientific tools (e.g., early microscope, telescope). Ask students to write down the name of the tool and one scientific breakthrough it enabled. Collect and review for understanding of tool-discovery links.

Frequently Asked Questions

Why do scientific theories change?

Scientific theories are based on the best evidence we have at the time. When new tools (like better microscopes or telescopes) are invented, we can see things we couldn't see before. If the new evidence doesn't fit the old theory, scientists have to change the theory.

What is an example of an ancient Australian scientific discovery?

First Nations Australians discovered that certain plants, like the Davidson Plum or Tea Tree, had powerful medicinal properties. They also developed sophisticated fish traps (like the Brewarrina Fish Traps) based on a deep understanding of river hydraulics and fish behavior.

Who is a famous Australian scientist?

There are many! For example, Fiona Wood invented 'spray-on skin' for burn victims, and Elizabeth Blackburn won a Nobel Prize for her work on DNA. These scientists show how Australian research helps people all over the world.

How can active learning help students understand famous discoveries?

By role-playing as scientists, students step into the shoes of the people who made these breakthroughs. They experience the challenge of defending a new idea against old beliefs, which helps them understand that science is not just about facts, but about evidence, persuasion, and courage.