science

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Across
  1. 4. large hole that formed in a tooth
  2. 6. give us energy to carry out life processes
  3. 8. each food group contiains . . .
  4. 9. a person that goes through life with not enough calcium and vitamin D
  5. 10. instead of teeth birds have . . .
  6. 11. example of flightless birds
Down
  1. 1. animals with internal bony skeletons
  2. 2. mammals that lay eggs
  3. 3. spiders and scorpions belong to a group called
  4. 4. the process sorting living things into different groups
  5. 5. helps us to pass out faeces easily
  6. 7. fish have this all over their body