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What type of magma does Popocatepetl have?

Since the 1519 arrival of the Spanish conquistadors in Mexico, Popocatépetl has erupted over 15 times. The most recent eruption began on Jan. 9, 2005, and continues nearly nine years later as of January 2015. Explosions and emissions of gas and water vapor generally continue to cover the crater at the summit of the volcano. The area around the volcano continues to be under an alert for a major eruption.

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What is wind erosion?

Several factors worked together to increase wind erosion during the American Dust Bowl. Small gasoline tractors increased the amount of land a farmer was able to work. Plowing served to displace native, deep-rooted grasses that held the soil in place during typical drought conditions and high winds. When the drought of the 1930s struck, the plains were ripe for wind erosion. These storms affected over 100 million acres in Oklahoma and Texas. By the end of the 1930s, wind erosion removed over 75 percent of the topsoil in some areas. Erosion decreased the value of farm land and the profits of th..

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What are the chemical properties of copper?

Copper is a reddish colored metal that polishes to a bright shine, of which HowStuffWorks says, makes it one of the most useful metals, like iron. While it does not rust, exposure to moisture results in a green patina. Its uses range from jewelry making to plumbing.\nCopper is second only to silver in its ability to conduct electricity. This makes it a valuable metal in the electronics industry, where it finds its greatest use.\nZinc alloys with copper are bronze, and tin alloys are brass. In addition, some copper alloys have importance in the biomedical field as they are antimicrobial.\nCoppe..

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How do you make ionized water?

Filter the water using a reverse osmosis water systemFilter tap water using either a Berkey or a reverse osmosis filtration system. This water is not ionized.Arrange the unit that ionizes the filtered waterFix stainless steel plates below the lids of two plastic containers, using bolts of ? inches by 1 ? inches with wing nuts on the top. These are terminals attached to the battery charger. Attach platinum electrodes to the steel plates. A CPVC pipe, 2 inches in diameter and 6 inches long, is fixed into two corresponding holes of the plastic tanks and glued externally to facilitate movement of ..

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What tool is used to measure density?

The volume of irregularly shaped solids can be found by using the displacement method, which the object is placed in a graduated cylinder containing a known volume of water. The subsequent change in water level is equal to the volume the object displaces. When calculating the density of a liquid, a graduated cylinder can be used to measure the liquid's volume.

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What does the number 84 in the name "krypton-84" represent?

Since each isotope of krypton has 36 protons, equal to the atomic number of the element, the mass number reflects the number of neutrons. Krypton-84, for example, has 84 neutrons in its nucleus. This isotope of krypton is the most abundant naturally occurring form of the element, found approximately 57 percent of the time. It is a stable isotope that has no half-life and does not decay into other elements over time. Unstable isotopes of the elements rubidium, strontium and bromine decay into krypton-84 over time.

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How does renewable energy work?

Solar energy can come from direct photoelectric generation using silicon panels, or it can come from harnessing the sun's heat to boil water and run an electric turbine. Wind power uses the wind's force to turn a propeller connected to a turbine, generating electricity from the motion. Hydroelectric systems use submerged propellers that turn as water flows through them, driving a turbine. Geothermal systems use Earth's heat to boil water, creating steam to run an electric turbine. Solar and geothermal energy can also be used for heating, either through passive building design or..

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What is the balanced molecular equation for KI and AgNO3?

In the equation KI + AgNO3 = AgI + KNO3, the potassium iodide and the silver nitrate react to form silver iodide and potassium nitrate. Equations are balanced using a technique called stoichiometry, with multiple molecules of a compound indicated by a stoichiometric coefficient. The compounds on the left side of the equation are called the reactants, and the compounds on the right side are called the products.

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What are some science projects involving acids in soda?

Six small bottles of different types of soda, such as Coca Cola, Pepsi, Dr. Pepper, Sprite and Mountain Dew are necessary. One small bottle of distilled water is necessary. Gather together six plastic cups, six tarnished pennies and a measuring cup. A journal to log notes in, a pencil to write with and a marker for labeling are also necessary. Measure one cup of the Coca Cola soda and pour it into one of the cups. Write on the cup which liquid it contains. Measure one cup for each of the remaining sodas and water and label those cups as well. Drop one penny into each of the cups. The penny in..

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Which type of synovial joint has the least amount of movement?

Synovial joints are composed of two bones separated by a fluid-filled sack. Most of the body's movable joints belong to this classification. The type of synovial joint with the greatest range of motion is the ball-and-socket, which includes the joint that connects the humerus to the shoulder.\nThe gliding or planar type is sometimes able to move in several directions, but the distance of this movement is tightly constrained. Examples of this type include the joints that connect vertebrae and many of the joints among the bones that make up the hands and feet. The range of motion in these h..

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