Cheat Sheet: Entering The World Of Secondary Science

1. Entering Secondary Science

1.1 What is Science

1.2 Scientific Models

• Simplified representations that focus only on what matters for a particular question
• Making a model deliberately ignores some details to keep study feasible
• As models become more complex, they include more details for greater accuracy
• Subject-specific models
  • Physics
    • Treated as a single point
    • Ignores shape, colour, size
  • Chemistry
    • Atoms shown as spheres with bonds
    • Ignores quantum behaviour of electrons
  • Biology
    • Cells shown as labelled diagrams
    • Ignores individual molecular interactions
  • Earth Science
    • Earth treated as a smooth layered sphere
    • Ignores mountains, valleys, ocean depths

1.3 The Language of Science

2. Scientific Practice

2.1 Scientific Predictions

• Predictions state what will happen before an experiment
• Predictions are reasoned expectations based on evidence and careful thinking
• When predictions match observations, confidence in the science grows
• When predictions do not match observations, scientists re-examine models, assumptions, and measurements
• Proper scientific predictions rely on measurable, pattern-based evidence

2.2 Limits, Estimation, and Theories

2.2.1 Limits of Scientific Theories

• Theories may fail when new conditions are explored
• Theories may fail when measurements become more precise
• Scientific ideas change only based on new evidence
• No scientific theory is final or beyond question

2.2.2 Estimation

• Approximate reasoning is an important scientific skill
• Estimation strategy
  1. Understand the situation
  2. Identify the key quantities
  3. Make a rough estimate
  4. Check whether the answer is reasonable

3. Units, Branches, and Human Activity

3.1 Importance of Standard Units (SI Units)

• Shared system of units enables worldwide comparison of results
• Using standard units prevents calculation errors from inconsistent units

3.2 Branches of Science

3.3 Science as a Human Activity

• Curiosity
• Creativity
• Collaboration
• Asking careful questions
• Testing ideas
• Sharing results and learning from mistakes