17-4 Evolution of Multicellular Life

Which portion of the timeline is known as the "Age of Mammals"?

• Precambrian Time
• Paleozoic Era
• Mesozoic Era
• Cenozoic Era

Which portion of the timeline is known as the "Age of Dinosaurs"?

• Precambrian Time
• Paleozoic Era
• Mesozoic Era
• Cenozoic Era

Place the following in order starting with the OLDEST
1  Paleozoic
2  Cenozoic
3  Precambrian
4  Mesozoic

• 1 3 2 4 
• 3 1 4 2
• 4 3 2 1 
• 2 3 1 4

Precambrian Time accounts for ___% of Earth's History.

• 10%
• 25%
• 50%
• 90%

Which period begins the Paleozoic Era?

• Triassic
• Permian
• Cambrian
• Quaternary

Which type of life dominates the Precambrian Time?

• Dinosaurs
• Mammals
• Bacteria
• Humans

The mostly deadly Mass Extinction (90% of species) occurs at the end of the...

• Paleozoic Era 
• Mesozoic Era
• Cenozoic Era
• Precambrian Time

What is a mass extinction?

• When all the species in a particular area on earth suddenly go extinct
• When multiple species from all over the earth suddenly go extinct 
• When one species goes extinct due to habitat changes
• When all life on earth is wiped out 

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5

There have been _____ mass extinction events in Earth's history.

• 3
• 4
• 5
• 2

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5

According to most scientists, what is the ultimate cause of most mass extinctions?

• overhunting

• evolution of new species to replace old ones

• major change in environment or climate

• asteroid impact