Science

Refine Search

What is a volcano called that erupts regularly?

A volcano is a mountain that opens downward into a pool of magma. Volcanoes are formed by magma working its way to the surface from the Earth's mantle. When the magma reaches the surface, it erupts and forms lava. As the volcano erupts repeatedly, it grows. There are more than 1,500 active volcanoes on Earth; 80 or more are found under the ocean. Most active volcanoes are found in Hawaii, Alaska, California, Oregon and Washington. Cinder cones, composite volcanoes, shield volcanoes and lava volcanoes are four different types of volcanoes.

Continue Reading

How do you find out the current time in different time zones?

If searching by city on TimeandDate.com, narrow your search by capital cities, popular cities or an extended list of cities. If you choose to search by country, the nations with multiple time zones appear with cities listed beside them so that you can find the proper time zone for a particular area within the country. The time displays with a.m. or p.m. and with the day of the week.\nWorldTimeZone.com displays a world map color coded by time zone with the current time listed in a box on each zone. The time is designated as a.m. or p.m. Some major cities appear on the map, but you need to know ..

Continue Reading

What does "cyclone" mean?

The word is derived from 19th century Greek, originally coming from the word "kuklos," meaning wheel, due to the manner in which the storm rotates and revolves so that it is turning around and spinning about the center. Synonyms include "typhoon," "hurricane," "tempest," "twister" and "storm." While some of these words are probably more commonly used to describe storms of this type, Collins Dictionary still provides a number of headlines that show the word "cyclone" is in fairly common usage.

Continue Reading

What is the temperature of the Arctic Circle?

The weather in the Arctic Circle is typically milder compared to Antarctica, as the Arctic Ocean serves as a moderating presence to the regions surrounding it. For large parts of the calendar year, the temperature of the Arctic Circle is cold and harsh, as it rarely receives direct sunlight. This is caused by the Earth's axial tilt, meaning the area only receives indirect sun rays, limiting the amount of solar radiation that it receives.

Continue Reading

What are examples of biotic and abiotic factors in the arctic tundra?

Since the soil is frozen for most of the year, trees do not grow on the arctic tundra. Much of the land is bare and rocky, supporting only low plants and grasses. Overall, the arctic tundra has low biodiversity, supporting only about 1,700 species of plants and 48 species of animals, mostly with low populations.

Continue Reading

What is the function of the iris?

The iris is the barrier between the front and back of the eye. Each iris has a muscle running through it that constricts and dilates to allow the right amount of light to enter the eye at any given time. The sphincter muscle lies around the edge of the pupil. In bright light, this muscle contracts, allowing only a small amount of light to get it. In dim light, the sphincter muscle dilates, letting in as much light as possible.Each person's texture, color and pattern of the iris is unique and the color of the irises come from a pigment called melanin. Eye color comes from the amount of mel..

Continue Reading

When was zinc discovered?

Prior to the discovery of zinc in India, its ores were used for medicine and brass compounds during the era of Augustus in Rome, which was between 20 B.C. and 14 A.D. Zinc was not recognized in Europe as a separate metal until the 16th century, when it was observed and produced as "zincum" by Agricola in Slesia.

Continue Reading

What animal has the biggest teeth?

In addition to their length, elephant tusks are thick and heavy, with the largest known specimen being 214 pounds. Because tusk size is genetic and poachers target the largest elephants, it is uncommon to find tusks weighing more than 100 pounds. Elephants tend to favor one tusk over the other, similar to humans being either left-handed or right-handed.

Continue Reading

Which solids dissolve in water?

Some total solids, such as naturally occurring minerals, rocks and organic earthen debris, do not pose risks to the surrounding water, or change its physical and chemical properties. However, some total solids, particularly those derived from chemicals and synthetic substances, may introduce harmful toxins into rivers, lakes, streams and other bodies of water. Total solids may accrue in an area over a period of time, or infiltrate a location en mass when deposited in large quantities through spills or improper disposal. High concentrations may carry large quantities of toxins, which then cling..

Continue Reading

What is a list of black things?

Some manufactured items are also black. Black musical instruments include clarinets, oboes and English horns. Selected wearable items, such as hats, shoes, purses, scarves, jewelry, eyeglasses and belts, are black. Examples of black foods include some types of licorice, beans, espresso and nori seaweed. Certain pens, mascaras and eye liners are black. Most car tires are black as well.

Continue Reading
Showing 6861 to 6870 of 10000 (1000 Pages)