Concepts & Models
How scientific models are developed, compared, and refined using evidence.
Development of Atomic Models
Scientists proposed different models of the atom as new evidence became available, each explaining observations earlier models could not.
- Dalton’s atomic theory
- Thomson’s model
- Rutherford’s model
- Bohr model
Comparing Atomic Models
Comparing models highlights what each explains well and where its limitations lie.
- Evidence supporting each model
- Observations not explained
- How later models built on earlier ideas
Role of Evidence in Science
Scientific models change when new evidence challenges existing ideas. Evidence from experiments and observations drives progress.
- Experiments and observations
- Interpreting data
- Why models are revised, not discarded