Vocab
A living thing
What is an organism?
This organism was completely aquatic and has the one bone/two bone structure.
What is eusthenopteron?
245 million years ago
When were the first dinosaur fossils?
This extinction is likely due to an asteroid impact.
What is the cretaceous extinction?
A vertebrate with four limbs
What is a tetrapod?
Any remains, trace, or imprint of animal or plant life preserved in Earth’s Crust.
What is a fossil?
This organism is considered to be the first true tetrapod?
518 million years ago?
When were the first fish fossils?
This extinction happened because of a rapid drop in global temperatures
What is the ordovician extinction?
A scientist who studies fossils
Who is a paleontologist?
All the known fossils on Earth
What is the fossil record?
This organism is known to have the first instance of digits (fingers and toes) but is still primarily aquatic.
What is acanthostega?
4.3 billion years ago
When was the first rock?
This extinction was caused by major volcanic eruptions.
What is the permian extinction?
A rock that forms when layers of sediments are stuck together
What is sedimentary rock?
The variety of life forms that exist on Earth
What is biodiversity?
The characteristics of Tiktaalik that were tetrapod like.
What is a flat head with eyes on the top, ribs, and hip bones?
300,000 years ago.
When were the first human fossils?
This extinction was due to large decreases in global carbon dioxide.
What is the devonian extinction?
A theory that says sedimentary rocks on the bottom are older than rocks on the top
What is the principle of superposition?
Pieces of weathered rock such as sand, deposited by wind, water, or ice
What are sediments?
The four pieces of evidence that suggest that four-legged animals came from fish.
What is DNA evidence, the idea that they are all vertebrates, their embryos are similar and the fossil record shows that there are intermediate animals?
225 million years ago
When were the first true mammal fossils?
This is the would-be-cause of the potential sixth extinction.
What is human activity?
No longer existing.