Earth Science


What happens when lava cools down October 22

Lava flows out of a volcano at various speeds, and it may travel long distances before hardening or begin to turn crusty as soon as it is exposed to surrounding cooler air. The lava may collect in vast fields, which is what often happens with lava th

What is seismology October 22

Seismic waves are caused by the sudden breaking or cracking of rocks beneath the Earth's surface. Tectonic plates are constantly moving, though slowly, and cause earthquakes when they collide or rub against each other. The subsequent waves of energy

Who is Jacques Piccard October 9

Who is Jacques Piccard
While the Challenger Deep mission was an impressive achievement, it ultimately proved to be an expensive and relatively useless one. The Trieste carried no scientific equipment and was not c ...

How do geologists classify rocks October 9

Each of the three main groups may be broken down into several categories, depending on a variety of factors. Igneous rocks are formed when volcanic magma cools and crystallizes into rock. When magma cools beneath the Earth's surface, the resulting ro

What is terrigenous sediment October 9

Terrigenous sediments are typically formed due to chemical weathering and dissolving of rocks. Some physical weathering occurs as a result of a region's climate. When the rocks are broken down by either process, they can then be transported. Transpor

What is the largest type of tephra October 9

Tephra are composed of pumice, glass, mineral crystals and different types of shattered rock. Volcanic eruptions blast tephra of different sizes, with the largest sizes ejecting from the volcano within 30 minutes of the eruption. Larger particles, su

What is Darcy's law October 9

The equation demonstrates that the amount of flow a fluid has between two points shares a directly proportional relationship to the distance between the two points, the pressure difference between the two points and the permeability of the flow paths

How are stalagmites formed September 16

Stalagmites are usually cone-shaped but may also be plate-shaped and can be found in limestone caverns all over the world. While drip formations can be formed quickly, in nature stalagmites may only grow seven thousandths of a millimeter a year, and

What are fault lines September 16

An active fault line is defined as areas where the Earth's crust moves over a period of time. This movement can generate earthquakes. Fault lines that are inactive show signs of previous crust movement but are relatively static in nature. Fault lines

What are different types of crystalline structures September 15

What are different types of crystalline structures
The shapes of crystals are distinct but difficult to imagine until seen. Also, names can be misleading. For example, a cubic crystal is not always cube shaped. Within the isometric classific ...

What is the average precipitation of polar ice cap biomes September 13

What is the average precipitation of polar ice cap biomes
Precipitation in polar ice cap biomes is typically very low because the temperature in these regions tends to be very cold. Air can only hold evaporated water until it reaches saturation, wh ...
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