RELATIVE DATING & SUPERPOSITION
In rock layers, where do you find the oldest rocks?
At the bottom
Which era is known as the Age of Dinosaurs?
The Mesozoic Era.
Which extinction event killed the dinosaurs?
The Cretaceous–Paleogene
Name one group of animals that went extinct in the asteroid impact.
Dinosaurs.
What do we call a break in rock layers where some rock has been removed?
An unconformity.
Which era comes after the Mesozoic?
The Cenozoic Era.
What usually causes mass extinctions: small changes or major sudden changes?
Major sudden changes
What ocean animals with hard shells were hurt badly during the Ordovician extinction?
Trilobites.
Which dating method compares rock layers?
relative dating
When did mammals begin to thrive before or after the dinosaurs went extinct?
After
Which mass extinction involved big drops in sea level and temperature?
The Ordovician extinction.
Which woolly mammal, related to elephants, went extinct around 4,000 years ago?
Woolly mammoth
What is the rule called that says lower layers are older?
Superposition
Which era saw the rise of mammals and birds after the dinosaurs went extinct?
The Cenozoic Era
Which mass extinction likely involved massive volcanic eruptions in Siberia?
The Permian–Triassic extinction
What type of giant armored fish died out in the Devonian extinction?
Placoderms.
Does superposition apply to sedimentary rocks or igneous rocks?
What major geological and biological changes during the Mesozoic Era helped shape modern continents and ecosystems?
The breakup of Pangea
Which mass extinction happened first in Earth’s history?
The Ordovician–Silurian mass extinction
Which herbivorous dinosaur with a long neck and tail went extinct at the end of the Cretaceous Period?
Brachiosaurus