Answer:
This fundamental structural unit consists of a silicon cation (black in photo) surrounded by four oxygen anions (red in photo), giving it four negative charges. It is found in all silicate minerals (ie. amphibole, olivine, pyroxene, quartz, feldspar, etc.). The silica tetrahedra may be arranged in chains (ex: pyroxenes), double chains (ex. amphiboles), sheets (ex: micas), and frameworks (ex: quartz, feldspars), forming the basic structure of the planet.
Hope this helped you
and a small request the next time if you want to post a question post each question seperately plz
Answer:
The silica tetrahedron is a molecule containing four oxygen atoms and one silicon atom. It resembles a triangular pyramid, with the silicon atom located in the middle and one oxygen atom located at each of the four corners.
Explanation:
The structure of olivine is described as isolated tetrahedral because each tetrahedron is bonded to either a magnesium ion or an iron ion. Although some minerals always appear the same color, many vary in color due to trace elements within the mineral. These trace elements can alter the mineral’s coloring.
Differences between metallic and nonmetallic luster in minerals:-
Metallic minerals are originated from the igneous types of rocks. Non-metallic minerals are originated from the sedimentary rocks. Appearance & touch: Metallic minerals are hard have a shiny appearance of their own. Non-metallic minerals are not as hard as the metallic minerals and have no shine or luster of their own.
Differences between cleavage and fracture of minerals:
The words cleavage and fracture are very common words that we use in many contexts. However, it is while identifying minerals that these words are used together as these are physical attributes of minerals and help in mineral identification as different minerals have different types of fractures and cleavages.
Hope I helped.
in gideon v. wainwright (1963) the supreme court ruled that gideon had been denied his rights because he had
Answer:
He had been denied his right of counsel in the trial.
Explanation:
Under the law in Florida, an attorney was appointed to you only if you were conisdered poor.
Answer:
Counsel in trial
Explanation:
In Gideon v. Wainwright (1963), the Supreme Court ruled that the Constitution requires the states to provide defense attorneys to criminal defendants charged with serious offenses who cannot afford lawyers themselves.
Science help, 40 points! Explain how these geological processes and interactions have changed Earth's surface through the years. Be sure to use evidence to support your answer.
Answer:
As time passes, different events change the ground like erosion, explosions, basically different impacts on the Earth's surface.
Explanation:
The earth is a dynamic planet and was in a raw or primitive form before humans evolved. The surface of earth has gone several changes since the origin of the earth some 4.5 bn years ago.
The geologic processes are related to the formation oceans basins, mountain chains and formation of glaciers. Agents like water, wind and ice have shaped earth surface and carved out valleys and formed distinct features. Volcanism and earthquakes have given shaped to the underground geology of the earth. As past is the key to the present the process that used to operate earlier can also be found today but not working at the same intensity. The formation of plate tectonics, separation of Gondwana, the formation of deccan traps. The formation of tethys sea and glacial lakes are a result of the several years of earth's formation.Learn more about the geological processes and interactions have changed Earth's surface through the years.
brainly.com/question/6781692.
Analyze the photo below and answer the question that follows.
A guanaco, which looks similar to a llama, standing in a field.
Photo by Mary Frances Howard
The guanaco, seen in the image above, lives in Latin America’s __________ ecosystem.
A. desert
B. rainforest
C. deciduous forest
D. coniferous forest
Answer:
d
Explanation:
Why is it that areas around the saline water bodies receive less rainfall as compared to the ones around fresh water bodies?
Answer:
Water in this area may have been leftover from ancient times when saline seas occupied the western U.S., and, also, as rainfall infiltrates downward into the ground, it can encounter rocks that contain highly soluble minerals, which turn the water saline.