Discuss each of the following physical properties of minerals: crystal form, color, streak, luster, hardness, cleavage, fracture, and specific gravity. What is responsible for the physical properties of minerals? Crystal form – Shape is determined by internal structure of mineral & most aren’t perfect b/c they don’t have enough space to form properly. Color- Least reliable. Streak- Color of a mineral in powdered form.
At constructive boundaries where plates are moving apart from one another, basaltic lava is erupted between the gaps. This type of lava is not very viscous due to its low silica content. This is because no subduction of crust is involved so the lava is not made of melted lithosphere but has risen from the mantle itself. The low viscosity of this lava causes it to flow very far before cooling and solidifying. This forms shield volcanoes with very gentle slopes and a much wider base than more conical shaped volcanoes involved with convergent plate margins.
Its relatively low temperature, high silica content and leads to blockages and powerful eruptions. This can mean that the eruptions caused by thick magma can be less frequent and more difficult to predict, meaning that when an eruption does occur, it is usually with little or no warning, which can lead to catastrophic consequences as any nearby settlement will be relatively unprepared for the effects of a violent volcanic eruption. Furthermore, acidic magma is more likely to produce
Phyllite. Like granite there were two types of phyllite found in the national park. Phyllite is a medium grade metamorphic rock with fine grain structure. It is formed from larger temperatures and heavier pressure effects than slate. In the Australian Alps, the phyllite would have formed in a layer lower than the lesser metamorphic rocks.
Atmospheric contamination can occur as a function of improper disposal of fracking fluid, or as a byproduct of natural gas refinement. As mentioned above, if the fracking fluid is not trucked to waste water treatment facilities, or dumped onto fields or into waterways, it is often sprayed into the air in a fine mist to facilitate evaporation. The mix of chemicals contained in the fracking fluid are then released into the atmosphere. (cite) After the gas has been extracted from the well it enters into the first stage of refinement on site. When the gas comes out of the ground, it comes out wet.
Tap water is considered homogenous because it often contains dissolved minerals and gasses which are dissolved throughout the water. 4. Is isopropyl alcohol (rubbing alcohol) a heterogeneous or homogenous mixture? Explain your answer. Rubbing alcohol is a hemogenous since you can’t see the different parts in it.
However, kames consist of gravel and sand deposited by streams that flowed into holes in the glacial ice, depositing sediment in the holes. When the ice later melted, the materials slumped down, often forming conical-shaped hills. Thus, kames are formed "from above," veblens "from below" (diagram "A" showing difference in the origin of these two kinds of features ).
(page 100, para 1 to page 102) Over time magma can melt through the wall rocks and enlarge the plumbing allowing for more flow and a centralized vent such as the one in Hawaii. Smaller fissures allows less lava to flow and can sometimes allow lava to slow and heal the
The extended holding of the waste fluid in the pits could lead to their seepage into the ground, especially if the pits are not lined with plastic. This contaminates the water sources around. In addition, any overflows, for instance caused by heavy rains, allows the fluid to contaminate water in the sources. Large volumes of fluid is required (thousands of gallons of water is used per well) and its disposal is an issue too (Schmidt, 2011). Proper disposal methods should be effected to ensure the water aquifers around do not get contaminated.
Furthermore, the influx of chemicals brought deep into the ground for extraction purposes have mixed with ground water, leading to lethal contamination of local drinking water. Amongst these results, fracking often yields high amounts of methane gases to the atmosphere. If fracking continues at high rates it will evidently threaten local habitats while also contaminating ground waters and while polluting