vocab
A gap in the geologic record occurs when sedimentary rocks have been lost due to erosion
unconformity
a way to determine the age of rocks
They analyze the position and angle of fossils and layers of the rock
a hooked toe and lived about 80 million years ago
velociraptor
a fish that doesn't have a jaw
jawless fish
the strongest bite of any animal
tyranosaurus rex
fossils or bones
What is the difference between relative age and absolute age
Relative age determines if an object or event is older or younger than another, placing it in chronological order without providing a specific number.
one of the first orgonizums
wiwaxia
an event that wiped out the dinosaurs
the smartest dinosaur
Troodon
law of superposition
to determine the relative age of sedimentary rocks
what does carbon-14 decays to stable______
nitrogen 14
Jurassic, Triassic, Cretaceous
Mesozoic era
an amphibian example and its definition
a animal that can swim in the water and walk on land
ex: spinosaurus
it break a bone in 1 or 2 hits
ankylosaurus
definition of period and era
long units of time
subdivided eras
How many half-lives does carbon-14 have
5,730
the cenozoic
Paleogene, Neogene, and Quaternary
definition of hypothesize
To propose a plausible, testable explanation for a phenomenon or problem based on existing evidence.
it got is name from argentina
argentinasaurus
definition and example of radioactive dating
To determine the absolute ages of all rocks. Volcanic layers and fossils
What does an unstable atom turn into as it gains energy and particles
a new atom
a cat with a large teeth
smilodon
one of the oldest animals on Earth today
dragon fly
The only two carnivores that can stand up to a T rex and win
Spinosaurus and Giganotosaurus