Exploring the Geologic Time Scale

Mr. Mavy provides an overview of the geologic time scale, covering Earth's history from the Precambrian era to the present. The video explains the formation of Earth, the emergence of life, and significant events like the Cambrian explosion, the formation of Pangaea, and the extinction of dinosaurs. It concludes with the Cenozoic era, highlighting the rise of mammals and the recent emergence of humans.

What percentage of Earth's history is covered by the Precambrian time period?

• 100%

• 88%

• 50%

• 12%

Tags

NGSS.MS-ESS1-4

What was the primary gas in the atmosphere during the Precambrian time period?

• Oxygen

• Methane

• Carbon Dioxide

• Nitrogen

What significant event marked the beginning of the Paleozoic era?

• Permian extinction

• Cambrian explosion

• Formation of Pangaea

• Meteorite impact

Which of the following organisms first appeared during the Paleozoic era?

• Mammals

• Birds

• Dinosaurs

• Reptiles

Tags

NGSS.MS-LS4-1

What was the name of the supercontinent that formed during the Paleozoic era?

• Pangaea

• Laurasia

• Gondwana

• Rodinia

Tags

NGSS.MS-ESS2-3

What event is believed to have caused the extinction of dinosaurs?

• Sea Level Rise

• Meteorite Impact

• Volcanic Eruption

• Ice Age

Tags

NGSS.MS-LS4-1

During which era did reptiles flourish and dominate the Earth?

• Cenozoic

• Precambrian

• Mesozoic

• Paleozoic

Which era is known as the age of mammals?

• Precambrian

• Cenozoic

• Paleozoic

• Mesozoic

What type of animals became more predominant during the Cenozoic era?

• Amphibians

• Reptiles

• Birds

• Fish

Tags

NGSS.MS-LS4-1

Approximately how long ago did humans appear in Earth's history?

• 65 million years ago

• 10,000 years ago

• 160,000 years ago

• 1 million years ago