| 01 | The scientific method | 48.7 |
| 02 | Energy and conservation | 44.7 |
| 03 | Digital Systems and Networks | 40.7 |
| 04 | The Copernican Principle | 40.5 |
| 05 | falsifiability | 36.9 |
| 06 | correlation vs. causation | 35.8 |
| 07 | Laws of thermodynamics and entropy | 35.7 |
| 08 | Hypothesis and testing | 35.3 |
| 09 | Theories | 33.2 |
| 10 | Atomic Theory | 30.8 |
| 11 | Cause and effect | 30.0 |
| 12 | Quantum Mechanics | 28.0 |
| 13 | Probability and uncertainty | 27.7 |
| 14 | Evolution by natural selection | 25.5 |
| 15 | DNA | 25.3 |
| 16 | sciencenews.org | 25.0 |
| 17 | Experimental Evidence as Arbiter | 25.0 |
| 18 | Cosmology and the Big Bang | 24.4 |
| 19 | Observation and measurement | 23.1 |
| 20 | relativity | 20.8 |
| 21 | web.stanford.edu | 19.2 |
| 22 | Statistical Significance and Probability | 19.2 |
| 23 | Evidence | 17.7 |
| 24 | Models | 16.3 |
| 25 | Evolution and Life's Interconnection | 14.7 |
| 26 | Evolution and adaptation | 14.7 |
| 27 | Peer review and replication | 13.8 |
| 28 | The Germ Theory of Disease | 13.5 |
| 29 | Gravity | 13.5 |
| 30 | Relativity and Quantum Mechanics | 13.1 |