Igneous rocks are made up of different minerals depending on the type of rock. The most common minerals found in igneous rocks are quartz, feldspar, mica, hornblende, and pyroxene. Quartz is usually colorless or white, feldspar can be white, pink, or gray, mica can range from green to brown to black, hornblende is usually black or green, and pyroxene is usually black.
Granite is an example of an igneous rock that contains quartz, feldspar, mica, and hornblende. Basalt is an example of an igneous rock that contains feldspar, pyroxene, and sometimes olivine. Peridotite is an example of an igneous rock that contains olivine, pyroxene, and sometimes hornblende.
The minerals in igneous rocks can be identified using a variety of methods including color, hardness, streak, luster, and cleavage. Color can be used to distinguish between different minerals; quartz is usually colorless or white, feldspar is usually pink, gray, or white, mica is usually green, brown, or black, hornblende is usually black or green, and pyroxene is usually black.
Hardness is another way to distinguish between different minerals. Quartz is the hardest mineral and has a hardness of 7 on the Mohs scale. Feldspar is slightly softer with a hardness of 6, mica has a hardness of 2-3, hornblende has a hardness of 5-6, and pyroxene has a hardness of 5-6.
The streak of a mineral is the color it leaves when scratched on a streak plate. The streak of quartz is white, the streak of feldspar is white or gray, the streak of mica is white, the streak of hornblende is black, and the streak of pyroxene is black.
Luster is another way to identify different minerals. Quartz has a vitreous luster, feldspar has a pearly or dull luster, mica has a pearly or silky luster, hornblende has a vitreous or pearly luster, and pyroxene has a vitreous or dull luster.
The cleavage of a mineral is how it breaks when it is struck or compressed. Quartz has no cleavage, feldspar has two directions of cleavage, mica has one direction of cleavage, hornblende has two directions of cleavage, and pyroxene has two directions of cleavage.
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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.
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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which element is found in greater amounts in low viscosity magma, than in high viscosity magma? question 12 options: a) si b) fe
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 layers in the atmosphere do temperatures vary the most?
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.
as transgression occurs at a given location, . choose one or more: a. sea level rises. b. the coastline migrates inland. c. sea level falls. d. the coastline migrates seaward. e. a mud layer accumulates over a sand layer.
Transgression is a term used to describe the phenomenon when the sea level rises and the coastline migrates inland. Therefore the correct option is option B.
This is a natural process that happens due to several reasons such as global warming, melting of glaciers and ice caps, and tectonic plate movements.
Transgression is the geological phenomenon that occurs when sea levels rise or land subsides, resulting in flooding and a gradual migration of coastal landforms inland.
Transgression occurs when relative sea level rises due to any one of several reasons such as melting of glaciers and ice caps, global warming, or tectonic plate movements.
Thus, transgression is a vital process that shapes our coastlines and plays a significant role in the geological history of the earth. Therefore the correct option is option B.
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What are the three ways In which corruption will negatively affect the financial growth of South Africa
Answer:
unemployment, reduction in tax revenue, decline in business operation and ultimately, collapse of the economy
briefly explain why a permanent temperature inversion (temperature increases with height) occurs throughout stratosphere
A permanent temperature inversion, in which temperature increases with height, occurs throughout the stratosphere because of the presence of ozone in the stratosphere.
The absorption of ultraviolet radiation by ozone causes the stratosphere to be heated. Due to the high temperatures of the stratosphere, the temperature increases with increasing altitude.
Additionally, the stratosphere is relatively dry, with little to no water vapor to absorb or emit heat, contributing to the permanent temperature inversion.
A permanent temperature inversion layer in the stratosphere helps to stabilize the atmosphere and prevent vertical mixing between the stratosphere and the troposphere below. This plays an important role in regulating our climate, as it helps to maintain the atmospheric conditions necessary for life on Earth. By preventing mixing, the temperature inversion layer helps to keep the troposphere cooler and drier than the stratosphere, which can have significant impacts on weather patterns and the overall climate system.
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