Amazing sedimentary rocks in the Grand Canyon, Arizona. Licensed under Creative Commons. A sedimentary rock is just what it sounds like: it is a rock that consists of sediment! They can consist of sand, clay, chalk and fossils. As a marine geologist, I find sedimentary rocks very fascinating!
All about Fossils and Carbon Dating: Dinosaur Teeth and More for Kids
Fossils | Earth Science
Theodosius Dobzhansky, a geneticist whose work influenced 20th century research on evolutionary theory, said, "Nothing in biology makes sense, except in light of evolution. Living things might, at first, seem very diverse, but closer inspection reveals a surprising unity. This unity, or common ancestry, can be explained by evolutionary theory. With such an important theory at stake, it is essential to understand the evidence upon which it is based. The Task In this Evolution WebQuest you will investigate a variety of types of evidence for evolution.
How Do Scientists Date Fossils?
Alliteration Hyperbole Metaphor Irony. View all reading worksheets. View all writing worksheets. Dramatic Irony Cacophony Anaphora Setting.
Fossils , in the geological sense, are ancient, mineralized plants, animals, and features that are the remains of an earlier geological time period. They may have been petrified but are still recognizable, as you can tell from this gallery of fossil pictures. Ammonoids were a very successful order of sea creatures Ammonoidea among the cephalopods , related to the octopuses , squids, and nautilus. Paleontologists are careful to distinguish the ammonoids from the ammonites. Ammonoids lived from Early Devonian times until the end of the Cretaceous Period, or from about million to 66 million years ago.