U2 - L4 - Geologic Time Scale

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

Which is closest to the accepted age of the Earth?

• 4,000
• 4 million 
• 4 billion 
• 4 trillion

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 type of animal appears earliest in the fossil record?  (OLDEST)

• Reptiles
• Birds
• Dinosaurs
• Fish

Which period begins the Paleozoic Era?

• Triassic
• Permian
• Cambrian
• Quaternary

Which type of animal appears earliest in the fossil record?  (OLDEST)

• Humans 
• Dinosaurs
• Birds
• Amphibians

No dinosaur fossils have ever been found _________ the tombstone layer.

• above
• below

Cavemen lived at the same time as the dinosaurs.

• TRUE
• FALSE