1. Living things
   1. Bacteria
   2. Fungi
   3. Plants
   4. Animals
2. Non-living things
   1. Materials
      1. Metal
      2. Glass
      3. Wood
      4. Rubber
      5. Plastic
      6. Ceramic
   2. Physical Properties
   3. Strength
   4. Hardness
   5. Flexibility
   6. Ability to float on or sink in water
3. Science (Diversity).xmind