Answer:
Viscosity - resistance to flow.
Magma has a higher viscosity if it has a lower temperature, is rich in silica, and contains a high abundance of dissolved gases.
Explanation:
Viscosity is referred to as a fluid's (liquid or gas) opposition or resistance to flow or change in shape. This resistance to motion or flow is caused by the internal friction between the molecules in the fluid. Viscosity denotes the thickness of the fluid. With increasing temperature, the viscosity decreases (thins) while with decreasing temperature, the viscosity increases (thickens).
Magma is a mixture of molten or liquid rock, crystals, dissolved gases, etc formed deep inside the earth and it causes volcanic eruptions when expelled onto the Earth's surface. The chemical composition of magma mostly contains silica, SiO2 (50 to 75% ) and iron, magnesium, sodium, potassium, and calcium form the rest. The magma contains dissolved gases and they give magmas their explosive behavior. The gas composition in magma consists of mostly water vapor and some carbon dioxide and traces of fluorine, sulfur and chlorine gases.
The viscosity of magma depends on the temperature, the composition of the magma and the amount of dissolved gases. As the SiO2 concentration in the magma increases, the viscosity also increases. The presence of a high amount of dissolved gases in magma also increases its viscosity. As the temperature of the magma increases, the viscosity decreases.
The rhyolitic type magma has a higher viscosity than the basaltic type magma and the andesitic type magma as it has a low temperature, rich in silica and contains a high abundance of dissolved gases.
Answer:
Water that contains a larger than normal amount of <em>magnesium</em> is still safe to drink.
Explanation:
Sulfur, lead and arsenic are harmful metals that are toxic to human health. Although magnesium present at high concentrations (above approximately 250 mg/l each) can have a laxative effect. However, data suggest that consumers adapt to these levels as exposures continue.
-- the characteristics of the medium through which it's moving
(tells you the speed of the wave)
then
-- the direction in which it's moving, together with the speed,
tells you the velocity of the wave.
Answer:
83 protons 126 neutrons. Bismuth Atom
Explanation:
The largest number of stable nuclei which could ever exist is the bismuth atom. A nuclei which is higher than that 83 protons is unstable and the nucleus will eventually breakdown through radioactivity.
<u>Answer:</u>
<h2>
Cold, Salty water.</h2>
<u>Explanation:</u>
The cold, salty ocean water is denser than the warmer water. Because of higher density, cold water sinks into the bottom of the ocean while warm water remains at the surface.
The sinking of the cold water at depth moving away from the surface generates deepwater currents by a process called upwelling. These deepwater currents bring the nutrient-rich water at the surface providing food and nutrients to marine life.