The Earth through time

By measuring the __________ of rocks, geologists have found that the Earth is 4600 million years old.

• eons

• eras

• radioactivity

Tags

NGSS.MS-ESS1-4

Geologists divide the history of the Earth into four great __________

• eons
• eras

• periods

Tags

NGSS.MS-ESS1-4

Eons are divided into ________

• decades
• periods

• eras

Tags

NGSS.MS-ESS1-4

Eras are divided into _________

• eons

• centuries
• periods

Tags

NGSS.MS-ESS1-4

The ________ era was the age of the dinosaurs.

• Jurassic
• Cretaceous
• Mesozoic

List the four eons of the Earth's history in the correct sequence, earliest first.

• Hadean, Archean, Proterozoic, Phanerozoic.

• Archean, Hadean, Phanerozoic, Proterozoic.

• Phanerozoic, Archean, Proterozoic, Hadean.

Tags

NGSS.MS-ESS1-4

The continents we know today were formed in the ___________

• Phanerozoic eon

• Hadean eon

• Proterozoic eon

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The whole Earth was hot and there were many volcanoes. ___________

• Phanerozoic eon

• Archean eon

• Hadean eon

Oxygen built up in the Earth's atmosphere. ___________

• Phanerozoic eon

• Archean eon

• Proterozoic eon

Tags

NGSS.MS-LS1-6

Microscopic living things first appeared. ___________

• Archean eon

• Hadean eon

• Proterozoic eon