| Select | | View | Download | | 2.1 Planet Earth as a source of chemicals | | |
| 2.2 Classification of matter | | |
| 2.3 Physical properties and chemical properties of substances | | |
| 2.4 Physical changes and chemical changes | | |
| 2.5 The atmosphere and composition of air | | |
| 2.6 Separation of oxygen and nitrogen from air | | |
| 2.7 Test for oxygen | | |
| 2.1 Planet Earth as a source of chemicals (bilingual version) | | |
| 2.2 Classification of matter (bilingual version) | | |
| 2.3 Physical properties and chemical properties of substances (bilingual version) | | |
| 2.4 Physical changes and chemical changes (bilingual version) | | |
| 2.5 The atmosphere and composition of air (bilingual version) | | |
| 2.6 Separation of oxygen and nitrogen from air (bilingual version) | | |
| 2.7 Test for oxygen (bilingual version) | | |
| The atmosphere (combined version) | | |
| The atmosphere (bilingual, combined version) | | |