Refl ection: How successful was your presentation?

3.5 How do we know if food is safe to eat? 42 3.6 How can we be safe online? 44 Unit 3 Final task: Talk about safety 46 Refl ection: How did you contribute to the presentation? 48 Unit 4: One step at a time 49 4.1 How is planet Earth? 50 4.2 What is happening under water? 52 4.3 How can we fi nd out about life in water? 54 4.4 What is happening on land? 56 4.5 How can weather affect life on land? 58 4.6 How can we help planet Earth? 60 Unit 4 Final task: Plan a way to help planet Earth 62 Refl ection: How well did we work together? 64 Unit 5: Which activities are good for us? 65 5.1 How can we keep healthy? 66 5.2 How fast do we breathe? 67 5.3 How fast do our hearts beat? 68 5.4 Can our heart and breathing rates change? 70 5.5 How do we record fi ndings? 72 5.6 What other sources of information can we use? 74 Sample Pages Unit 5 Final task: Make a poster about the benefi ts of exercise 76 Refl ection: How successful was your poster? 78 Glossary of key terms x Acknowledgements 81