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Does an increase in silica increase the viscosity of magma?
Yes. Viscosity is the resistance of a fluid to flowing. A high viscosity means low flowing (I specifically mention this because this is a huge pitfall) When silica content increases, and when temperature decreases, the viscosity of a magma increases along with it.
What happens to entropy when pressure decreases?
When pressure decreases, entropy increases. Increases in entropy correspond to pressure decreases and other irreversible changes in a system. Entropy determines that thermal energy always flows spontaneously from regions of higher temperature to regions of lower temperature, in the form of heat.
When magma reaches the surface its dissolved gas content increases True or False?
False! The reduction in pressure causes the gasses to exsolve (come out of solution) and escape into the atmosphere, so the dissolved gas content of a magma reduces when it reaches the surface.
What form of energy is related to change in speed?
Kinetic energy is related to the change in speed of an object. As an object's speed increases, its kinetic energy also increases, and as its speed decreases, its kinetic energy decreases.
What causes the gases in magma to expand?
When magma is underground it is under enormous pressure, which causes the gasses to dissolve in the magma. As the magma rises pressure decreases and the gasses come out of solution. All gasses expand when decompressed.
Does an increase in silica increase the viscosity of magma?
Yes. Viscosity is the resistance of a fluid to flowing. A high viscosity means low flowing (I specifically mention this because this is a huge pitfall) When silica content increases, and when temperature decreases, the viscosity of a magma increases along with it.
What happens to entropy when pressure decreases?
When pressure decreases, entropy increases. Increases in entropy correspond to pressure decreases and other irreversible changes in a system. Entropy determines that thermal energy always flows spontaneously from regions of higher temperature to regions of lower temperature, in the form of heat.
How magma rock are form?
magmatic rocks are igneous rocks they form by magma nd magma is form by melting of rocks because several km deep the subsurface temperature is very high which melts the rock(metamorphic rock).as magma rises towards the surface the temperature towards surface gradually decreases. magma slowly cools and intrusive igneous rocks are formed nd if magma comes on surface called lava here rapidly cooling is caused nd extrusive magmatic rocks are formed
When magma reaches the surface its dissolved gas content increases True or False?
False! The reduction in pressure causes the gasses to exsolve (come out of solution) and escape into the atmosphere, so the dissolved gas content of a magma reduces when it reaches the surface.
The pressure of gas decreases with increasing temperature?
If the temperature decreases, the volume is also going to decrease, and if the pressure decreases, the volume is going to increase. So they balance each other out, if they are decreased at the same rate.
Under what conditions does magma form?
Magma forms where rock is heated to a temperature above its eutectic melting point.
Explain how the additional of fluids to hot rock causes magma to form?
The lithosphere primarily comprises of volcanic rocks and sediments that contain fluids and water. These fluids contact the rocks surrounding as the lithosphere moves into the mantle in the downward direction. The rock's melting temperature decreases when the fluid begins the enter the hot rock. This melts it to form magma.
As the rate of cooling of igneous rocks increases the size of the crystals that form .?
The size of crystals decreases as the cooling increases. This is called an inverse relationship.
When depth into the earth increases so does?
When depth into the earth increases, the pressure and temperature also tend to increase. This can cause changes in the state of materials, such as rocks melting to form magma. Additionally, the composition of the Earth's layers and the intensity of geological processes may vary with depth.
What form of energy is related to change in speed?
Kinetic energy is related to the change in speed of an object. As an object's speed increases, its kinetic energy also increases, and as its speed decreases, its kinetic energy decreases.
What causes the gases in magma to expand?
When magma is underground it is under enormous pressure, which causes the gasses to dissolve in the magma. As the magma rises pressure decreases and the gasses come out of solution. All gasses expand when decompressed.
When matter loses heat what is its temperature?
When matter loses heat, its temperature decreases. Heat is a form of energy, and as it is transferred from an object, the average kinetic energy of the particles in the object decreases, leading to a lower temperature.
