Step back in time - wayyyy back. Long before the rise of mammals or even the first dinosaurs, Earth was a very different place. Shifting continents, prehistoric seas, and alien atmospheres shaped the planet we now call home. This quiz explores the hidden chapters of Earth's ancient history, from the formation of continents to the earliest lifeforms. Test your knowledge of epochs most people never think about, and see how well you know the world before time as we know it began. It's time to dust off your geological instincts and dive into the depths of ancient Earth.
According to modern scientific consensus, the Earth is ________ years old.
2.4 billion
9.1 billion
4.5 billion
980 million
What process primarily led to the formation of Earth's early atmosphere?
Cosmic radiation
Outgassing from volcanoes
Oxygen from plants
Meteoritic impacts
What is the name of the single landmass that existed around 250 million years ago?
Pangaea
Gondwana
Eurasia
Laurasia
What ancient sea creature is known from the Cambrian Explosion for its complex eyes and armor-like exoskeleton?
Trilobite
Troglodyte
Placoderm
Ammonite
What ancient ocean surrounded the supercontinent Pangaea?
Paleo-Tethys
Iapetus
Panthalassa
Tethys
The Earth's inner core is primarily composed of what?
Nickel
Iron
Magnesium
Sulfur
Which ancient continent included modern-day Africa, South America, and Antarctica?
Laurentia
Gondwana
Baltica
Laurasia
What role did volcanic activity play in the formation of early Earth's oceans?
It cooled the atmosphere
It formed ozone
It released water vapor into the atmosphere
It reduced carbon levels
Which supercontinent formed after Rodinia and before Pangaea?
Laurasia
Baltica
Vaalbara
Gondwana
The Devonian period in Earth's history is also referred to as the Age of _____.
Fish
Frogs
Dinosaur
Sapien
What did early land plants need most to survive outside of water?
Large leaves
Chlorophyll
Roots and vascular systems
Flowers
Which of the following is a type of prehistoric shark?
Megalodon
Ichthyosaur
Coelacanth
Velociraptor
What kind of water body is thought to have covered much of Earth in early history?
Lakes
Ice shelves
Shallow seas
Rivers
During the _____ period, 360 to 300 million years ago, a brave time traveler will encounter giant insects and swampy forests.
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8/18/2025
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