Geologic Time Scale

Relative dating of rock layers tells us that the deeper we dig, _______.

• the younger the rocks get
• the smellier the rocks get
• the harder the rocks get
• the older the rocks get

Why is the fossil record incomplete?

• fossils get eroded away over time
• most organisms never became fossils
• scavengers and decomposers eat them too quickly
• all of the above

Paleozoic, Mesozoic & Cenozoic are all

• Epochs
• Eras
• Periods
• Eons

Tags

NGSS.MS-ESS1-4

Which is the most recent era of time- the one that we are currently in?

• Mesozoic 
• Paleozoic 
• Cenozoic 
• Precambrian 

Tags

NGSS.MS-ESS1-4

Identify the Era:
called the "Age of Mammals"

• Precambrian
• Paleozoic
• Mesozoic
• Cenozoic

Identify the Era:
that was the longest of all eras

• Precambrian
• Paleozoic
• Mesozoic
• Cenozoic

Identify the Era:
where dinosaurs thrived

• Precambrian
• Paleozoic
• Mesozoic
• Cenozoic

Identify the Era:
First forms of life appeared in this era.

• Precambrian
• Paleozoic
• Mesozoic
• Cenozoic

Tags

NGSS.HS-ESS1-6

What is a fossil?

• any dead organism
• the preserved remains or traces of an organism
• a perfect copy of a rock
• an unusual type of rock

How do most fossils form?

• Living things die and their remains are covered by sediment
• The hard parts of an organism dry out in the air
• The soft parts of an organism change to stone
• Freezing preserves the remains of an organism