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