Geologic Time Scale

the tool we use to organize Earth's events as they happened

• era

• law of superposition

• geologic time scale

• original horizontality

Tags

NGSS.MS-ESS1-4

absolute age

• The actual age in years of an event or object
• A record of the geologic events and life forms in Earth's history.
• the remains or traces of ancient living things

relative age

• the age of rocks and geologic features compared with other rocks and features nearby
• Distinctive fossil used to compare the relative ages of fossils. They were on the Earth for a short period of time.
• The actual age in years of an event or object

Tags

NGSS.MS-ESS1-4

The Law of Superposition states

• Younger rocks layers are on top of older rock layers

• Fossils are found in sedimentary rocks

• Older rock layers are on top of younger rock layers

• Absolute age dating

Tags

NGSS.MS-ESS1-4

The Earth is _____________________ years old.

• 4.6 million

• 4.6 billion

• 4.6 trillion

• 4.6 zillion

Tags

NGSS.MS-ESS1-4

Which period are we currently in?

• Quaternary
• Holocene
• Jurassic
• Tertiary

Tags

NGSS.MS-ESS1-4

Which of the following periods occurred first (is the oldest)?

• Cretaceous

• Jurassic

• Triassic

• Permian

Tags

NGSS.MS-ESS1-4

Which of the following is the most recent epoch (newest)?

• Pleistocene

• Paleocene

• Eocene

• Holocene

• Miocene

Tags

NGSS.MS-ESS1-4

The Phanerozoic eon began about _______ years ago.

• 542 m.y.a.

• 248 m.y.a.

• 2500 m.y.a.

• 4500 m.y.a.

• 1 m.y.a

Tags

NGSS.MS-ESS1-4

Which era is the longest?

• Cenozoic

• Cambrian

• Precambrian

• Phanerozoic

Tags

NGSS.MS-ESS1-4