Geologic Time

Question 1

What is Earth history?

Answer 1

time broken up into huge amounts

Question 2

How is Earth history broken down?

Answer 2

Era (largest) is broken into periods (smaller) which is broken into epochs (smallest)

Question 3

What is the current Era/Period/Epoch?

Answer 3

Cenozoic Era, Quaternary Period, and Anthropocene Epoch (used to be Holocene)

Question 4

What are the Eras?

Answer 4

Pre-Cambrian, Paleozoic, Mesozoic, and Cenozoic

Question 5

What is the Pre-Cambrian Era?

Answer 5

• the beginning of Earth with very primitive life
• oldest + longest era (most distant)
• 2 periods = Azoic and Archazoic

Question 6

What is the Paleozoic Era?

Answer 6

(Age of Ancient Life)
Has 6 Periods:
-Cambrian
-Ordovician
-Silurian
-Devonian
-Carboniferous
-Permian

Question 7

What is the Mesozoic Era?

Answer 7

(Age of Reptiles)
- time of the dinosaurs (time they evolved to the time they became extinct)
3 Periods:
- Triassic
- Jurassic
- Cretaceous

Question 8

What is the Cenozoic Era?

Answer 8

(Age of Mammals)
2 Periods:
- Tertiary
- Quarternary