The Aztec vs. Incas Civilizations

November 5th, 2008

In history class, you have probably studied about the Aztecs and the Incas. But it seems that their histories are always in the same sentence that you cannot differentiate the two cultures distinctively. Now, you meet a history buff and you want to impress him/her with your knowledge. What to do then? Well, find out more about this topic of course.

The Aztecs and Incas civilizations are easily confused with each other for the simple reason that they both have a lot in common. Basically, what you need to realize is that the Aztec empire traces its roots to Mexico while the Incas trace their origins to where Peru is located today. Both empires reached their greatest during the early 16th century. The two empires dabbled in human sacrifice, they made technological advancements, and ultimately, they fell under the colony of Spain.

As for their distinction, the only thing that seems [...] Continue Reading…

Do Ice volcanoes exist

November 4th, 2008

Ice volcanoes form during winter months and are found on the lakes. Ice volcano is commonly observed in the Lake Superior during winter months. Ice shelf starts building into the lake with cones formation at the leading edge in the lake. Strong winds hitting onshore drive the waves that hits the bottom to develop and break on the ice shelf. As the ice shelf reaches its maximum build waves travel beneath the ice and move with force through the preformed cones and cracks.

Ice volcanoes need certain conditions to be satisfied before they are formed. High tidal waves presence is required in the area. Intensity of the eruption is determined by the height of the wave and the direction of the wave. Cones are difficult to form if the amplitude of the waves is less than one meter. Heavy onshore winds triggered by storms and squalls with required wave height [...] Continue Reading…

Why does fire burn upwards and not in any other direction

November 3rd, 2008

In a wood fire, the wood is heated by lightning, burning match stick, friction or a focused point of sunlight.  Decomposition of a portion of the cellulose material happens when the wood reaches about 260 deg Celsius.

Decomposed material degenerates to volatile gases that are commonly termed smoke. Smoke is composed of hydrogen, carbon and oxygen.  At this stage, the compound molecules disintegrate and the atoms undergo recombination to form water, carbon dioxide and other gases. This process is called burning. Burning emits light. Flame is a product of light through heat and the effect is called incandescence. Colors of the flame depend on the material being used for burning and the temperature. Hottest part or the base of the flame is blue and the top of the flame is orange or yellow in color.

How a flame burns is determined by the Earth’s gravitational force. Fire is a chemical reaction [...] Continue Reading…