Classic Science offers Life Science For Free. Although I could not find great descriptions or extensive info, the Life Science is FREE
| Unit 1 Basic Needs/Resources Chapter 1 Living and Non-Living Things Chapter 2 Material and Non-Material Resources Chapter 3 Reduce, Reuse and Recycle Chapter 4 Habitats and Niche Unit 2 Biomes Chapter 5 Grasslands and Forests Chapter 6 More Forest Biomes Chapter 7 Tundra and Desert Chapter 8 Aquatic Biome Unit 3 Life Cycles Chapter 9 Species and Offspring Chapter 10 Plant Structure Chapter 11 Reptiles and Amphibians Chapter 12 Birds, Mammals and Insects Unit 4 Classification Chapter 13 Classifying Animals Chapter 14 Classifying Plants Chapter 15 Classifying Fungi and Protists Chapter 16 The Bacterial Kingdoms | Unit 5 Food Webs Chapter 17 Food Chains Chapter 18 Food Webs Chapter 19 Famine, Disease and Viruses Chapter 20 Conservation Efforts Chapter 21 Taste and Smell Chapter 22 Vision, Hearing and Touch Chapter 23 “Other” Senses Chapter 24 The Brain Unit 7 Body Organs Chapter 25 Skin, Muscle and Bone Chapter 26 Heart and Lungs Chapter 27 Stomach, Intestines and Kidneys Chapter 28 Pancreas, Liver and Gallbladder Unit 8 Cells Chapter 29 Cells 101 Chapter 30 Organelles Part I Chapter 31 Organelles Part II Chapter 32 Bacterial Cells Unit 9 Health and Nutrition Chapter 33 Hygiene and Health Chapter 34 Immune System Chapter 35 Nutrition Chapter 36 Drugs and your Body |