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How does archaebacteria obtain energy?

Methanogens are unique in the fact that they cannot exist in oxygenated environments. These bacteria are mostly found in areas like bogs, sewage and even intestines. Common bacteria cannot survive in areas with high salt content, but in the archaebacteria classification there is an exception to that. Halophiles thrive in high salt environments like the Dead Sea or the Great Salt Lakes. Halophiles unlike the other types of archae can switch what type of energy creating process they use from aerobic respiration to photosynthesis with a pigment called bacteriorhodopsin. Thermophiles live in areas..

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What is the bending of light called?

When a wave travels from one medium to another with a different density, the velocity of the wave changes. This change in velocity changes the direction of the wave, making it bend. The bend occurs at the interface, the point at which the medium changes. Though the velocity changes, the frequency of the wave remains constant. The change in direction can be calculated using Snell's law and is frequently used in optics development.

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How do you view a live local Doppler radar?

The National Weather Service allows users to layer elements on the display, such as cities, counties, highways, rivers and topography, by checking boxes below the map. The map also displays tornado, severe thunderstorm, flash flood and special marine warnings.\nDoppler radar bounces a microwave signal off an object and determines how the object's motion has changed the frequency of the returning signal. Calculations take into account the Doppler effect, which is where the radar gets its name. In addition to meteorology, Doppler radar is used in aviation, satellites, radar speed guns and s..

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What are some abiotic factors of a coral reef?

Despite the fact that abiotic factors are nonbiological, they can still have a great effect on the well-being of a coral reef. Conditions that change due to global warming, for example, can affect the stability of the entire ecosystem, wreaking havoc on the coral reef and surrounding areas. Too much change in the abiotic factors can affect how much sunlight reaches the reef, which affects how much food a coral has available.

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How old is Venus?

Venus's age can be estimated because of radioactive dating of meteorites. Astronomers look at the percentages of radioactive elements within meteorites and how much these elements have decayed over the years to determine age.\nIn its inception, Venus was just dust, but the dust combined to create grains that eventually became rocks and then a planetoid. Venus is the hottest planet in the Milky Way and experiences temperatures as high as 870 degrees Fahrenheit.

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How do binoculars work?

While binoculars operate using the same principles as a telescope, they typically feature shorter body length, a wider field of view and three-dimensional viewing. Through use of a prism, binoculars are able to increase the distance between lenses that light must travel through without requiring an increase in overall body length. Binoculars make use of a larger objective lens that provides initial magnification and a smaller ocular lens that provides focus and clarity.\nThe most common type of binoculars make use of an offset prism arrangement that was invented by a 19th-century Italian physi..

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Why do animal cells not contain cell walls?

Cells without walls specialize to produce nerve and muscle cells. Communication between cells occurs easily without the presence of a cell wall, keeping the organism regulated and allowing molecules to pass quickly between cells through diffusion. Animal cells do not need the protection of walls because specialized skin cells protect the rest of the cells. For support, cells attach to an extracellular protein matrix that is not found in any other multicellular organism.

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Is everyone ticklish?

Tickling is subjective, with stimuli producing a variety of responses. Unanticipated tickling often results in laughter, while being prepared for tickling can prevent the laugh response.\nGargalesis is tickling that can produce laughter, while knismesis is tickling produced by light touch that often results in an itchy feeling.\nVarious studies on tickling have been carried out, with a wide array of results that explain why tickling happens, how different people respond and why self-tickling does not work.

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What is the Lewis dot structure for a sulfate ion?

Each of the O's connecting to the S by one pair of dots has three pairs of dots around it and a minus sign next to it. The Lewis structure should have 32 dots to represent the 32 valence electrons. The structure must have a charge of minus two. The sulfate ion has six possible resonance structures.

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What is heat energy?

Heat energy also causes a substance to expand because the molecules need more space to move around in, and this is called thermal expansion. When a substance is cooled down, it will contract and be smaller than its original size. Linear expansion is the term use for rods or railway tracks where they will expand and become longer as they get warmer. Area expansion can be found in objects, such as engine pistons and the object becomes larger. Volume expansion can be seen in liquids as they become warmer.Heat energy can transfer between objects. Conduction, convection and radiation are all terms ..

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