What are the key elements defining the separation between Jurassic and Cretaceous?
Geology & LandformThe Jurassic-Cretaceous Boundary: When the World Started to Change So, picture this: it’s about 145 million years ago. Dinosaurs roam, the planet’s a bit warmer, and things are… well, shifting. We’re talking about the transition from the Jurassic to the Cretaceous period – a time that, while not as dramatic as the asteroid that wiped
Why does the so called “tornado alley” exist?
Earth ScienceTornado Alley is a loosely defined area of the central United States where tornadoes are most frequent. The term was first used in 1952 as the title of a research project to study severe weather in areas of Texas, Louisiana, Oklahoma, Kansas, South Dakota, Iowa and Nebraska. Who created the term Tornado Alley? The first
What is the tectonic explanation for parallel ridges in the Arctic Ocean?
Earth ScienceAsked by: Dallas Dooley Is the Arctic Ocean a divergent ocean? The Arctic Ocean is home to the volcanically active Gakkel ridge, which is an example of a divergent plate boundary. Unlike volcanic activity on land (tall, conical, non-spreading), undersea volcanoes are linear, usually long and continuously oozing magma. What formed the Lomonosov Ridge? The
What is this geographical feature? (as seen in maps)
Earth ScienceAsked by: Samuel Lotz What is a geographical feature on a map? Geographic features, or geographical formations, are components of a planet that can be referred to as locations, sites, areas, or regions (and therefore may show up on maps). There are natural geographic features, abstract geographic features, and on Earth there are also artificial
Can clouds increase the level of UV-A radiations received on the earth surface? If so, by how much, and in which condition(s)?
Earth ScienceAsked by: Samuel Lotz Do clouds increase UV rays? A term coined as the ‘broken cloud effect’ reveals that certain clouds can actually create higher UV levels than a perfectly cloudless day. When compared with completely clear skies, studies have shown that partially cloudy skies have raised the UV-B rays by 25% and increased DNA
Chicxulub Asteroid Remains?
Earth ScienceAsked by: Jami Coulson Does the Chicxulub asteroid still exist? UPDATE: Today, scientists published their first results from a drilling expedition into Chicxulub crater, the buried remnants of an asteroid impact off the Yucatán Peninsula in Mexico that killed off the dinosaurs 66 million years ago. Are there still pieces of the asteroid that killed