Paleozoic Era
This was the first period of the Paleozoic Era.
What is the Cambrian Period?
This era is often called the "Age of Reptiles."
What is the Mesozoic Era?
This era is known as the “Age of Mammals.”
What is the Cenozoic Era?
This method is used to determine the actual age of a rock or fossil.
What is absolute dating?
This explosion of life occurred at the start of the Paleozoic.
What is the Cambrian Explosion?
This group of animals dominated the land during the Mesozoic.
What is dinosaurs?
This epoch saw the rise of early humans.
What is the Pliocene Epoch?
This is the time it takes for half of a radioactive element to decay.
What is a half-life?
This type of animal dominated during the Devonian period.
What is fish?
This period saw the breakup of the supercontinent Pangaea.
What is the Jurassic Period?
These large mammals, like the woolly mammoth, roamed during the Ice Age.
What is megafauna?
This isotope is commonly used to date very old rocks.
What is Uranium-238?
This event at the end of the Paleozoic caused 90% of marine species to go extinct.
What is the Permian-Triassic extinction event?
This extinction event marked the end of the Mesozoic Era.
What is the Cretaceous–Paleogene extinction?
This geological event formed the Himalayas during the Cenozoic.
What is the collision of the Indian and Eurasian plates?
This type of dating uses isotopes rather than comparison to other layers.
What is radioactive dating?
This mountain-building event happened during the late Paleozoic as continents collided.
What is the Appalachian Orogeny?
This flying reptile is not a dinosaur, but lived during the Mesozoic.
What is a pterosaur?
This epoch began about 11,700 years ago and continues today.
What is the Holocene Epoch?
Radiocarbon dating is limited to this approximate maximum age range.
What is 50,000 years?