1. UNIT 1: THE EARTH, AN INHABITED PLANET

2. Common substances to all living beings - Water - Minerals - Carbohydrates - Fats - Proteins

3. UNIT 1: THE EARTH, AN INHABITED PLANET WATER: about seventy five percent of our body.

4. UNIT 1: THE EARTH, AN INHABITED PLANET MINERALS: necessary for blood. For example: iron,...

5. UNIT 1: THE EARTH, AN INHABITED PLANET CARBOHYDRATES: energy for our body (for example sugar,...).

6. UNIT 1: THE EARTH, AN INHABITED PLANET FATS: store of energy (for example olive oil,...).

7. UNIT 1: THE EARTH, AN INHABITED PLANET PROTEINS: they are vital for growth (for example meat,...).

8. ACTIVITY 1 Which of the following are inorganic substances: water, proteins, carbohydrates and minerals

9. ACTIVITY 2 Match the substances with the foods: