Matter makes up you, me and everything else that takes up space in the universe.
Picturesque Mount St. Helens erupted on May 18, 1980 and remains the most destructive example of volcanic activity in the United States.
On the Big Island of Hawaii, one of the world's most active volcanoes has been spewing lava since 1983.
The only active volcano on mainland Europe is famous for destroying the cities of Pompeii and Herculaneum.
Mount Etna is Italy's largest active volcano. It is also the volcano with the longest record of continuous eruption.
A dramatic burst of evolutionary change, called the Cambrian Explosion, occurred during this period.
The Precambrian was the first super eon of Earth’s history, lasting from about 4.6 billion to 542 million years ago.
Gas is a state of matter that has no fixed shape and no fixed volume. Gas particles spread out and are evenly spaced throughout a container.
The Cretaceous Period lasted approximately 79 million years, and ended with a major extinction event about 65.5 million years ago.
Liquid is a state of matter between solid and gas. Molecule are farther apart from one another, giving them space to flow and take on the shape of their container.
Solid is a state of matter in which the molecules are packed closely together and usually arranged in a regular pattern. A solid object has a fixed shape and volume.
In many ways, the history of civilization is the history of chemistry. Humans have always sought to identify, use and change the materials in our environment.
Did you know that Easter eggs are wonderful materials for fun science projects? Try some of these eggs-periments and find out how interesting your eggs can be!
The Devonian Period occurred from 416 million to 358 million years ago. It is often known as the “Age of Fishes."
The Silurian Period occurred from 443 million to 416 million years ago. It was a time of great environmental changes on Earth and saw the first evidence of life on land.
The Triassic Period occurred between 251 million and 199 million years ago. It was a time when life outside of the oceans began to diversify.
The Permian Period lasted from 299 million to 251 million years ago. Two groups of animals that dominated the period would later branch into mammals and reptiles.
The Quaternary Period is a geologic time period that encompasses the most recent 2.6 million years — including the present day.
Louis Pasteur was a French chemist who proved that germs cause disease, developed vaccines for anthrax and rabies and created the process of pasteurization.