Geologic Time Scale

A record of the geologic events and life forms in Earth's history.

• index fossil
• half-life
• radioactive dating
• geologic time scale

Tags

NGSS.MS-ESS1-4

Paleozoic, Mesozoic & Cenozoic are all

• Epochs
• Eras
• Periods
• Eons

Tags

NGSS.MS-ESS1-4

The dinosaurs and reptiles were dominant in which Era?

• Precambrian
• Mesozoic
• Paleozoic
• Cenozoic

Tags

NGSS.MS-LS4-1

Multicellular life first appeared in the _____.

• Cenozoic era

• Mesozoic era

• Paleozoic era

• Precambrian era

The earliest forms of life appeared ______years ago.

• 3.5 billion

• 1 million

• one hundred thousand

• 3.9 billion

Dinosaurs and people _____ at the same time.

• may have lived

• have never lived

• lived

• all of these

Humans appeared in the _____ which when translated means “recent life.”

• Mesozoic Era

• Cenozoic Era

• Paleozoic Era

• Precambrian time

We are currently in the _______.

• Mesozoic Era

• Cenozoic Era

• Paleozoic Era

• Precambrian Time

The geologic time scale divides Earth’s history into intervals based on_____.

• Even units of time like 1 billion years or 1 million years.

• Major events or changes on Earth

• Earth’s rotation around the Sun

• Fossils found around the world

What is a mass extinction?

• when there was no water
• when many species evolve
• when the Earth was formed
• when many types of species die out

Tags

NGSS.MS-LS4-1