LS4.A Level 3 Enrichment

What is the main idea of geologic time?

• To study the formation of the Earth

• To understand the diversity of life forms throughout Earth's history

• To analyze the rock layers around the world

• To determine the age of fossils

Which era is characterized by marine life forms?

• Paleozoic era

• Mesozoic era

• Cenozoic era

• Precambrian era

What major event marks the end of the Precambrian time?

• Formation of the moon

• Cambrian explosion

• Mass extinction

• Volcanic eruptions

Which era is known for the dominance of dinosaurs?

• Paleozoic era

• Mesozoic era

• Cenozoic era

• Precambrian era

What caused the mass extinction at the end of the Paleozoic era?

• Extensive volcanic activity

• Impact events

• Continental movement

• All of the above

What event caused the extinction of dinosaurs?

• Ice age

• Climate change

• Asteroid impact

• Volcanic eruptions

Which era is characterized by the dominance of mammals?

• Paleozoic era

• Mesozoic era

• Cenozoic era

• Precambrian era

What is the current era we are in?

• Paleozoic era

• Mesozoic era

• Cenozoic era

• Precambrian era

What is the smallest unit of geologic time?

• Eon

• Era

• Period

• Epoch

What is the duration of the Paleozoic era?

• Approximately 300 million years

• Approximately 200 million years

• Approximately 100 million years

• Approximately 50 million years