on April 15, 2022
What is active and passive recreation?
GeologyActive recreation: An activity that requires a considerable expenditure of energy – e.g: cycling. Passive recreation: Involves little exertion, but is generally sustained – for example, reading and fishing. What is an active recreation? Active recreation is leisure time physical activity undertaken outside of structured, competition sport. It is a set of activities within the
on April 15, 2022
What ended the Phanerozoic eon?
GeologyWhat happened Phanerozoic eon? The time span of the Phanerozoic starts with the sudden appearance of fossilized evidence of a number of animal phyla; the evolution of those phyla into diverse forms; the emergence and development of complex plants; the evolution of fish; the emergence of insects and tetrapods; and the development of modern fauna.
on April 15, 2022
Why is the inner core of the Earth solid and not liquid?
GeologyThe inner core is solid because it is made of very dense, or heavy, materials – like iron and nickel. Even though it is very hot, these materials don’t “melt” very easily, so they stay solid. Why is the inner core a solid and not a liquid? However, unlike the outer core, the inner core
on April 15, 2022
What does the Pycnocline separate?
Geologypycnocline, in oceanography, boundary separating two liquid layers of different densities. In oceans a large density difference between surface waters (or upper 100 metres [330 feet]) and deep ocean water effectively prevents vertical currents; the one exception is in polar regions where pycnocline is absent. Why is the pycnocline important to plankton? Below the mixed
on April 15, 2022
How big are the crystals in the Cave of Crystals?
Geology36 feetup to 36 feet (11 meters) long and weighing up to 55 tons. “It’s a natural marvel,” said García-Ruiz, of the University of Granada in Spain. How old are the crystals in the Cave of Crystals? about 500,000 years Stein-Erik Lauritzen (University of Bergen, Norway) performed uranium-thorium dating to determine the maximum age of
on April 15, 2022
What safety equipment do volcanologists use in their work?
GeologyMost of the time when they work on a volcano, they just wear a pair of heavy boots, jeans, hat, and long-sleeved shirt to protect from sharp dried lava. They might use heavy work gloves if they are working on fresh lava flows and a rock-climbing helmet if working in an area where there is
on April 15, 2022
What are fragments that make up rocks?
GeologyTextures are fragments that make up rocks. Nonfoliated metamorphic rocks form distinct, parallel layers. What are rocks called that are made of the fragments of other rocks? Clastic sedimentary rocks Clastic sedimentary rocks are composed of rock fragments (clasts) that have been cemented together. What are small fragments of rocks called? Sedimentary rocks are made
on April 15, 2022
What kind of animals are in the Appalachian Mountains?
GeologyThe wildlife a person might encounter in the Appalachian Mountains includes a wide variety of animals: Mammals (moose, white-tailed deer, black bears, beaver, chipmunks, rabbits, squirrels, foxes, raccoons, opossums, skunks, groundhogs, porcupines, bats, weasels, shrews, and minks) What are the creatures that live in the Appalachian Mountains? Scattered through other areas are the black bear,
on April 15, 2022
What are Exogenic forces?
GeologyExogenic (or exogenetic) factors are agents supplying energy for actions that are located at or near the earth’s surface. Exogenic factors are usually driven by gravity or atmospheric forces. The term is commonly applied to various processes such as weathering, denudation, mass wasting, etc. What are Exogenic forces explain? The forces which derive their strength
on April 15, 2022
Can minerals be human made?
GeologyAlthough minerals, by definition, must form via natural processes, Hazen’s team discovered 208 minerals mediated by humans—they did form naturally but in places such as man-made mines, where unnatural humidity or fires from mining operations created new minerals along the mine walls. Can humans make minerals? Humans can create artificial minerals, like synthetic gemstones, pure