Science

Refine Search

What is a metric ruler used for?

A metric ruler, also called a rule or, especially in the printing industry, a line gauge, is a measuring instrument used in technical drawing, geometry, engineering, printing and construction to rule straight lines and calculate distances. As such, metric rulers often have distance markings along their edges. Woods, plastics and metals are among the materials used in making metric rulers.

Continue Reading

What do rainforest animals eat?

The rainforest is home to some of the largest, fiercest animals and reptiles in the world, including Bengal tigers, jaguars, gorillas, anacondas, boa constrictors and reticulated pythons. Bengal tigers eat monkeys, pigs, birds, antelopes, boars, and, occasionally, elephants. Similarly, jaguars eat many different kind of animals, including turtles, tapir and deer. Gorillas, on the other hand, are vegetarians and eat leaves, fruit and bark.\nReptiles make up a large class of rainforest animals. The anaconda is a large snake that lives near the water in South America. It eats rodents, fish, birds..

Continue Reading

How are granite and rhyolite different?

Rhyolite is very diverse in its appearance despite its typical chemical composition due to the varied circumstances of solidification. Granite, on the other hand, while varied in color and coarseness of grain, is much more uniform and identifiable. Unlike rhyolite, which solidifies within or outside volcanoes, granite solidifies from magma deep beneath the earth. Its slow solidification allows it to form large, granular mineral crystals. Rhyolite usually cools quickly, creating only small crystals or even uncrystallized glasses. Glasses are amorphous solids, with constituent molecules frozen i..

Continue Reading

Why was daylight savings time initiated?

President Woodrow Wilson signed the law initiating U.S. Daylight Saving Time in 1918. After seven months, the law was repealed, with only a few cities electing to continue DST on their own. After the bombing of Pearl Harbor and the United States' entering into World War II, DST was again implemented, only this time it was called "War Time."\nAfter the war ended, cities and states were free to observe DST, or not. This caused mass confusion in the broadcasting and transportation industries. In 1966, the Uniform Time Act was passed, which mandated DST from April to October each year. States..

Continue Reading

How do ferns reproduce?

With the right environmental conditions, the spores will be carried to new areas where they germinate and form fern prothallus. A fern has a leafy branch called a frond, which consists of smaller leaflets known as pinnae. There are tiny spots under a frond where spores grow inside casings referred to as sporangia. These sporangia form a sorus, which sometimes exist on the veins of a fern leaf. They are also sometimes found under the pinnae. Not all fronds contain spores. Fronds with spores are known as fertile fronds. Through a circuitous process, a spore can grow into an adult fern. It needs ..

Continue Reading

What are examples of autotrophic bacteria?

Cyanobacteria, also called blue-green algae, are among the most common types of autotrophic bacteria. These organisms are not related to other types of algae but nonetheless also live in aquatic environments, such as lakes and oceans, and produce food using sunlight. Cyanobacteria, like plants, contain cellular structures called chloroplasts, which allow them to perform photosynthesis. Cyanobacteria are among the oldest living organisms on earth with fossil records dating back over 3.5 billion years. While cyanobacteria create energy using photosynthesis, others rely on chemosynthesis to make ..

Continue Reading

How do you separate oil and water?

Changing the state of the water to either a gas or a solid is a means to cleanly remove all of the oil from the water. Boiling the mixture eliminates the water by turning it into a gas. Boiling affects the water and not the oil because oil has a lower vapor pressure than water.\nLikewise, freezing the mixture pushes any oil molecules out of the water when the water molecules bond more closely with one another, eliminating any space for stray oil molecules. After it is frozen, the frozen water can be separated from the still-liquid oil, which has a lower freezing point.\nTo remove the water fro..

Continue Reading

What is a word equation for photosynthesis?

Most plants and algae, and some bacteria, rely upon photosynthesis and, by doing so, play a vital role in maintaining the atmospheric oxygen levels required by aerobic organisms. The degree of light energy captured globally through photosynthesis has been estimated to be six times greater than the power consumption currently used by human civilization.

Continue Reading

What are the effects of natural resource depletion?

Natural resources include water, fuel, soil, land and air. Depletion of these resources produces competition among living organisms for the remaining portions, and diminishes the quality of available resources.Of the life-sustaining natural resources for humans, plants and animals, water ranks high on the list of the most basic and important elements. Certain human-caused activities reduce the quality of safe and accessible drinking water. A reduced water quality presents problems surrounding health and welfare, especially in combination with too much or too little water. Impaired water quali..

Continue Reading

How long does it take for lava to cool down?

Lava is molten rock that erupts from volcanoes. Lava floats to the surface of the Earth because it is less dense than the rock around it. When it escapes from the surface, it is called magma. Lava that is not very thick can flow very far from a volcano, but thick lava stays close, creating the base of the volcano. The temperature of lava depends on the minerals in it and their composition.

Continue Reading
Showing 9651 to 9660 of 10000 (1000 Pages)