Final answer:
The periods in the Precambrian era are the Hadean, Archean, and Proterozoic. They are followed by the Paleozoic, Mesozoic, and Cenozoic eras in the Phanerozoic eon.
Step-by-step explanation:
The periods in the Precambrian era are divided into the following order:
- Hadean Eon (4.6 billion - 4 billion years ago)
- Archean Eon (4 billion - 2.5 billion years ago)
- Proterozoic Eon (2.5 billion - 541 million years ago)
The Phanerozoic eon, which follows the Precambrian era, is divided into three eras:
- Paleozoic Era (541 million - 252 million years ago)
- Mesozoic Era (252 million - 66 million years ago)
- Cenozoic Era (66 million years ago - present)
Each era is then further divided into periods, epochs, and ages, marking significant changes and events throughout Earth's history.