20 Questions
What is the name of the massive supercontinent that formed between 320 million and 195 million years ago?
Pangaea
How many continents did Earth have when Pangaea existed?
One
What are the three subdivisions of the Precambrian eon?
Hadean, Archean, and Proterozoic
Name the first geological time period of the Paleozoic Era.
Cambrian Period
What is the meaning of the Phanerozoic eon?
Visible life
What were some of the animals that evolved during the Cambrian period?
Chordates, hard-bodied brachiopods, and arthropods
What was the primitive plants that began to appear on land during the Cambrian period?
Non-vascular plants like mosses and liverworts
What was the most remarkable biological event during the Silurian period?
Evolution and diversification of fish
What group of fish first appeared during the Silurian with powerful jaws lined with bladelike plates?
Armored Placoderms
What were the first terrestrial arthropods that appeared during the Devonian period?
Wingless insects and the earliest arachnids
During which geological time period did the massive supercontinent Pangaea exist?
Carboniferous Period
Which eon is subdivided into Hadean, Archean, and Proterozoic?
Precambrian
Which eon is associated with the increase of free oxygen as a result of photosynthetic action by primitive life forms in the sea?
Proterozoic
What is the meaning of the Phanerozoic eon?
Visible life
Which eon is known for the formation of volcanic belts and marine rocks with fossils of microscopic bacteria and algae?
Archean
What type of plants began to appear on land during the Cambrian period?
Non-vascular plants like mosses and liverworts
Which group of fish first appeared during the Silurian period with powerful jaws lined with bladelike plates?
Placoderms
What did the first terrestrial arthropods, including wingless insects and the earliest arachnids, appear during?
Devonian period
What was one of the most remarkable biological events during the Silurian period?
Diversification of fish
What type of plants were present on land before the second largest mass extinction at the end of the Cambrian period?
Non-vascular plants like mosses and liverworts
Test your knowledge about the formation of the supercontinent Pangaea and the subdivisions of the Precambrian eon, including the Hadean, Archean, and Proterozoic periods. Learn about Earth's ancient history and geological transformations.
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