Earth Sciences

How many eras are there?

• 2

• 5

• 4

• 3

what are eras split up into?

• period

• epochs

• events

• age

what time was the Precambrian era

• 570-245 mya

• 4600-570 mya

• 245-65.5

• 65.5 present day

what was the age of the reptiles

• Mesozoic

• Paleozoic

• cenozoic

when was the age of the mammals?

• Paleozoic

• Mesozoic

• cenozoic

• precambrian

Order of the eras

• Cenozoic,Mesozoic,Paleozoic Precambrian

• Precambrian Cenozoic mesozoic palozoic

• palozoic cenozoic, mesozoic precambrain

How old is the planet

• 4.5

• 3.2

• 4.6

• 8.1

Rocks that contain fossils

• Metamorphic

• sedimentary

• igneous

What killed the dinos

• Dust cloud

• metaphors

• volcanoes

• We have no clue

The devonian period was what

• age of the fishes

• age of the ampibions

• invertebrates