| Topics | Subtopics | |
| 1 | Respiration | 1.1 The human respiratory system |
| 1.2 Gas exchange | ||
| 1.3 Breathing | ||
| 1.4 Respiration | ||
| 1.5 Blood | ||
| 2 | Ecosystems | 2.1 The Sonoran Desert |
| 2.2 Different ecosystems | ||
| 2.3 Intruders in an ecosystem | ||
| 2.4 Bioaccumulation | ||
| 3 | Diet and growth | 3.1 Nutrients |
| 3.2 A balanced diet | ||
| 3.3 Growth, development and health | ||
| 3.4 Moving the body |