Earth's History

A(n) __________________occurs when many types of living things die out at the same time. 

• mass extinction
• mass exhibit

The Mesozoic Era is often called the Age of _____________ because of the success of these animals.

• Reptiles
• Mammals

The Triassic Period saw the rise of __________, or warm-blooded vertebrates that feed milk to their young.

• Mammals
• Reptiles

Longest part of Earths history

• Cambrian
• Precambrian 
• Phaenorozoic
• Cenozoic

The longest subdivision of time

• Eon
• Era
• Epoch
• Extinct

Modern humans (Homo sapiens) and dinosaurs never existed together on Earth.

• True
• False

How old do Paleontologists believe the Earth is?

• 2015 years old
• 3.6 billion years old
• 4.6 billion years old
• 4.6 million years old

Which represents the correct sequence of the eras of geologic time from oldest to youngest?

• Mesozoic, Cenozoic, Paleozoic

• Paleozoic, Mesozoic, Cenozoic

• Cenozoic, Paleozoic, Mesozoic

• Paleozoic, Cenozoic, Mesozoic

Which is the most likely reason for specific mass extinction of living organisms?

• increased tilting of the Earth's axis

• energy surges from the Sun's surface

• the impact of asteroids or small comets on the Earth's surface

• increased volcanic and earthquake activity along crustal plate boundaries

A mass extinction occurred at the end of each era. Which extinction marked the end of the Mesozoic era?

• amphibians

• dinosaurs

• marine invertebrates

• woolly mammoths