what is an aquifer, igneous and metamorphic rocks are not good aquifers as they contain little natural porosity or permeability.

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Answer 1

An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt) from which groundwater can be extracted. Igneous and metamorphic rocks generally contain little natural porosity or permeability and therefore cannot be used as aquifers. Igneous rocks, for instance, form when molten magma cools and solidifies.

The cooling process does not leave much space for porosity and permeability. The recrystallization of the rock grains during metamorphism also does not leave much space for porosity and permeability.

Aquifers can be found in sedimentary rocks like sandstone, limestone and shale because the grains of these rocks are arranged in a way that allows for more porosity and permeability.

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which element is found in greater amounts in low viscosity magma, than in high viscosity magma? question 12 options: a) si b) fe

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Si (Silica) is found in greater amounts in low viscosity magma, than in high viscosity magma. Option A is correct answer.

High silica content magmas will consequently show higher levels of polymerization and have higher viscosities than magmas with low silica concentration. A substance's viscosity is a measurement of its consistency. A substance's viscosity is defined as its capacity to resist flow. Viscosity is, in some ways, the inverse of fluidity. Because cold molasses is less fluid than water, it has a greater viscosity.

The temperature, composition, and gas concentration of a magma all influence its viscosity. The relationship between temperature and viscosity is self-evident. The greater the temperature, like with most liquids, the more fluid the material becomes, reducing its viscosity.

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which of the following are geologic settings where travertine can form? choose one or more: a. in glacial lakes b. in caves c. in fast-moving rivers d. near hot springs e. in swamps

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Travertine can form in a variety of geologic settings, including in caves, near hot springs, and in fast-moving rivers. Therefore the correct option is option A, B and C.

In caves, travertine forms as a result of carbon dioxide in the air dissolving in water. This results in an increase in the acidity of the water, which in turn dissolves the rock the cave is made of and deposits the resulting sediment in the form of travertine.
Near hot springs, the water is saturated with dissolved minerals such as calcium carbonate, which can also be deposited in the form of travertine.
In fast-moving rivers, the increased turbulence can cause the suspended sediment in the water to become trapped and deposited in the form of travertine.
Travertine can also form in glacial lakes, but not in swamps.

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Which of the layers in the atmosphere do temperatures vary the most?

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Answer:

The Troposphere

Explanation:

It has most of our weather like rain, snow, and clouds. On this part of the atmosphere, the temp gets cold as the amount of space above the earth increases.

which is true concerning the blue and magenta colors used to depict airspace on sectional aeronautical charts? group of answer choices faded lines represent airspace which extends to the surface.

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The given statement "the blue and magenta colors used to depict airspace on sectional aeronautical charts have faded lines which represent airspace which extends to the surface" is true because a sectional chart is a map utilized in air navigation that portrays the details of an area's airspace.

This map has contour lines and visual terrain characteristics, including obstructions, lakes, and rivers, which provide pilots with the information they need to navigate safely in VFR conditions.

The sectional chart's primary objective is to depict land features that might help a pilot navigate the area. The chart contains many different symbols and markings to indicate obstacles, airports, and other important details that a pilot should be aware of while flying. The colors blue and magenta are used to denote airspace on sectional charts.

Meanwhile, magenta color denotes airspace that stretches from the surface up to 10,000 feet, above sea level. It indicates Class E airspace in which Class G airspace above 14,500 feet MSL is also depicted in magenta. The faded lines within the blue and magenta airspace denote airspace that extends to the surface, as mentioned earlier.

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further west from this deep u.s. trough, eastern alaska, as well as yukon and british columbia, canada, were being impacted by a . a. ridge b. trough g

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Further west from the deep U.S. trough, Eastern Alaska, as well as Yukon and British Columbia, Canada, were being impacted by a ridge.

A ridge of high pressure is impacting Eastern Alaska, Yukon and British Columbia in Canada, further west from the deep U.S. trough. A ridge of high pressure is an area of high atmospheric pressure, which is associated with fair weather, light winds and generally pleasant conditions. This ridge is formed when two air masses move away from each other, causing the air pressure in the area to increase. A ridge is typically indicated on a weather map by a line of red L's. The L's are placed on the map in the direction of the wind flow around the ridge, with the point of the L representing the area of highest atmospheric pressure.

The increased atmospheric pressure caused by the ridge produces lighter winds and warmer temperatures. The warmer temperatures and decreased wind speeds generally lead to more stable weather conditions and less precipitation. The ridge can also bring dry and sunny conditions, as well as a decrease in storm activity. These effects can be felt further downwind of the ridge, making it a welcomed feature in many areas.

In contrast, a trough is typically associated with low-pressure areas that produce wet, stormy weather conditions, as well as cool temperatures. This is because the low-pressure system promotes the formation of clouds and precipitation, which can reduce the amount of solar radiation that reaches the Earth's surface.

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