1. The Geological Priods:
- Cambrian
- Ordovician
- Silurian
- Devonian
- Carboniferous
- Permian
- Triassic
- Jurassic
- Cretaceous
- Tertiary
- Quaternary
2. COS D Carboniferous PeT Jurassic CreT Q
3. The layers order is:
- D
- A
- E
- B
- C
1. The Geological Priods:
2. COS D Carboniferous PeT Jurassic CreT Q
3. The layers order is:

that are all interesting in their own ways, but in my opinion biology and geology are my favorite. I like geology because of the way rocks and the heat of the earths core controls the movement of the continents.
I also enjoy biology because it is all about living things, life, and nature.