4.1 Reptile or Amphibian (Life Science) 4.2 Weird Plants (Life Science) 4.3 Pond Life (Life Science) 4.4 Parasitic Life (Life Science) 4.5 Fighting Infections (Life Science) 4.6 Weather and Currents (Earth Science) 4.7 Hurricanes (Earth Science) 4.8 Fossil Detectives (Earth Science) 4.9 Ice! (Earth Science) 4.10 Wind Power (Earth Science) 4.11 Lighter Than Air (Physical Science) 4.12 How Hot (Physical Science) 4.13 Poles Apart (Physical Science) 4.14 Movie Science (Physical Science) 4.15 Newton and Gravity (Physical Science) 4.16 On the Building Site (Physical Science) 4.17 Eclipse (Space and Technology) 4.18 The Red Planet (Space and Technology) 4.19 Great Inventions (Space and Technology)