Eras and Periods

Question 1

Precambrian era

Answer 1

4500-540 mya

Question 2

Paleozoic era

Answer 2

540-248 million years ago

Question 3

Mesozoic era

Answer 3

248-65 million years ago

Question 4

Cenozoic era

Answer 4

65 million years ago-present

Question 5

Periods within the paleozoic era from oldest to youngest

Answer 5

• cambrian
• ordovician
• silurian
• devonian
• carboniferous: Mississippian
• carboniferous: Pennsylvanian
• Permian

Question 6

Periods within the mesozoic era from oldest to youngest

Answer 6

• triassic
• jurassic
• cretaceous

Question 7

Periods within the cenzoic era from oldest to youngest

Answer 7

• tertiary
• quaternary

Question 8

Periods in order from oldest to youngest

Answer 8

• cambrian
• ordovician
• silurian
• devonian
• carboniferous: Mississippian
• carboniferous: Pennsylvanian
• Permian
• triassic
• jurassic
• cretaceous
• tertiary
• quaternary