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What is the role of producers in an ecosystem?

Producers in an ecosystem provide food and nourishment for other species. For example, green plants self-feed via photosynthesis and then grazing animals use the plants for their own nourishment. Photosynthesis is a process in which an organism uses inorganic carbon to synthesize organic compounds using solar energy or light. Autotrophs are a producer because they too create their own food via inorganic substances, such as carbon dioxide. The consumers who feed on producers are heterotrophs.

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How can you tell the difference of a rock vs. a mineral?

Minerals are usually the same color throughout. Rocks do not have a uniform color. Some describe minerals as having a physically appealing appearance, while rocks do not possess the same quality. Minerals do not have fossils, while some rocks have fossils. All rocks contain at least two or more minerals. Conversely, a mineral is not made up of rocks. Rocks have several different names, depending on their size. There are about 3,000 known minerals on Earth.

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What are the differences between a planet and a star?

Anything in the universe with a mass of more than 75 times the size of Jupiter automatically gets star status. A star must also have a high enough temperature to allow nuclear fusion to take place.Planets form when materials around a star begin to condense. These materials often condense around rock or ice cores and some planets are almost completely rock and ice while others are gas surrounded by rock and ice.

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What does "chemical reaction" mean?

Essentially, in a chemical reaction, the atoms that make up the involved chemicals rearrange to form new ones that are more stable under current conditions. The only way to definitively tell that a chemical reaction has occurred is by doing chemical analysis in a lab. However, a good heuristic that is commonly used to identify chemical reactions is that chemical reactions typically produce heat, light, color changes, gas, a precipitate or some combination thereof. For example, the reaction between the acetic acid in vinegar and sodium bicarbonate produces carbon dioxide gas, which was not pres..

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Why is electricity dangerous?

OSHA states that injuries from an electrical shock vary based on the amount of current passing through the body and the length of time a person is exposed to electricity. At a low current of one milliampere, a person feels a tingling sensation, but the electricity is unlikely to cause injury. However, as the current increases, electrical shock becomes more painful, causes muscle contractions and damages internal organs, including paralysis of the heart and lungs.

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What is parabolic flight?

These flights are done on specially designed aircraft. The campaigns typically consist of three flights. There are 30 parabolas flown at a time, and during two of the flights, the gravity is increased in 20-second intervals. This happens prior to and following the reduced-gravity interval. Parabolic flights are the only sub-orbital carriers that can medically observe and test humans under reduced gravity circumstances. These tests are valuable for physicists because of the hands-on training experience.

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When does the biceps muscle make a prominent bulge?

There are two types of isotonic exercises that work the biceps brachii muscle, concentric and eccentric. Concentric exercise forces the muscle to move against gravity, as happens in a biceps curl. Eccentric contraction occurs when the muscle must control the downward pull of the arm caused by gravity or weights.\nEccentric exercises are more challenging than the concentric type, explains the University of California at San Diego on its muscle physiology site. One example of the greater capacity of an eccentric exercise is the fact that humans are able to lower a much heavier load than they can..

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How many sixteenths of an inch are in one inch?

One of the "Golden Rules of Fractions" is that "any number over itself is equal to one," according to about.com. Applying that statement to the original problem, 16/16 is equal to one. There are also three 1/3s of an inch in one inch, four 1/4s and the trend continues. One-sixteenth of an inch is a very small measurement that is 1/4 of a quarter of an inch.

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What is a batholith?

This body of igneous rock is irregularly shaped, and its side walls are steeply inclined against its host rock. It was once believed that batholiths extend to unknown depths, but recent studies have found that many batholiths are 10 to 15 km, or 6 to 9 miles, thick. One popular batholith is found in the Sierra Nevada range located in California.

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What are the five states of matter?

Matter is anything that can be seen, touched, smelled or felt. Below are some details regarding the five states of matter.Liquid state - liquids have a definite volume but take the shape of the container in which they occupy. This means liquids do not have shape. They are made up of vibrating particles that are held together by intermolecular bondsGas state - gases have no shape and will assume the shape of the container in which they are placed. They are made up of tiny particles that are vastly separated and are in constant vibration. When liquids are heated, they tend to change into gasesSo..

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