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Where can you buy geodes?

GemCenterUSA.com and PikesPeakRock.com both offer wholesale bulk geode lots for sale in a variety of sizes and crystals. PikesPeakRock.com sells finished, polished and display-ready geodes in both natural and dyed finishes. GemCenterUSA.com sells bulk lots of unopened geodes at wholesale prices in sizes ranging from just more than 2 inches through 4 inches.

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What are the types of mechanical waves?

Transverse waves are waves in which particles move perpendicular to the direction the wave is traveling. An example of this is a stretched slinky shaken to move up and down.\nLongitudinal waves are waves in which particles move parallel to the direction the wave is traveling. A sound wave is an example of a longitudinal wave.\nIn a surface wave, particles on the surface of a medium move in a circular motion. For example, an ocean wave at the surface.

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How thick is the human skull?

Although women's skulls are thicker than men's on average, their skulls are smaller, with the average front-to-back measurement being 6.73 inches for women and 6.93 inches for men. Though skull thickness is thought to improve the outcome for anyone experiencing a head injury, skull shape is also believed to play a role in how well a person responds to trauma to the head. Another thing of note is that skulls thin with age.

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What is seismic activity?

Seismic activity results not only from earthquakes, but from volcanoes and human activity, such as explosions. Seismologists use the Richter scale to measure the magnitude of earthquakes, volcanoes and other seismic activity throughout the world. Seismometers detect the presence of seismic activity. The CTBTO Preparatory Commission reports that sensitive seismometers are capable of picking up activity from a person stomping.\nSMS Tsunami Warning indicates there are two primary types of seismic activity, both of which start at an earthquake's epicenter and travel outward in a manner resemb..

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What is the function of the midbrain?

The midbrain works with assistance from the cerebellum, cerebral cortex and substantia nigra. The substantia nigra, a component in the mesencephalon, is linked with motor system pathways within the basal ganglia. The midbrain is situated near the center part of the brain underneath the cerebral cortex and above the hindbrain. In this region, the spinal cord and brain come together to form the various functions of the midbrain. The rubospinal tract, which extends from the cerebellum to the bottom motion sensors within the brain triggers voluntary movements.

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What is ascorbic acid?

Ascorbic acid helps the body perform vital functions such as healing, growth and bone cartilage production. It aids in the production of the protein collagen, which is responsible for the creation of new skin, tendons and blood vessels.\nA deficiency of Vitamin C in the body may result in gingivitis, dry and split hairs, skin problems and weakened immune systems. It may also cause nosebleeds, susceptibility to bruising and a slower rate of healing.

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What is quiescent current?

Quiescent current is also called ground current or supply current. One example of a quiescent current is the energy used by a television that is turned off but plugged into an outlet.\nIn circuits with low-dropout regulators, the quiescent current maintains the regulator's circuitry and is what accounts for the observed difference between the input and output currents.

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What is an example of a reverse fault?

A reverse fault occurs when one rock wall begins sliding upwards against another rock wall. The wall that's moving upward is known as the hanging wall, and the stationary one is known as the footwall. Reverse faults are classified as a type of dip-slip fault, because the two pieces of rock coming together are moving vertically in regards to each other, rather than horizontally sliding past one another.\nReverse faults occur as a result of force being applied to two rocky blocks in such a way as to push them towards one another. This type of fault often creates mountains as the hanging wal..

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What does "warm-blooded" mean?

Reptiles and other cold-blooded animals must draw heat form the environment, and they are slower and less active when the temperature drops. They also have a slower metabolism, which is why they often spend long periods of time resting. However, being cold-blooded has an advantage: they do not have to eat as much as their warm-blooded counterparts.\nIn exchange for their more robust dietary demands, warm-blooded animals are able to cope with a broader range of environmental conditions, but hotter weather is often a greater threat than cold weather. Warm-blooded creatures are able to move at a ..

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What is the pH level of bleach?

Pure water has a pH value of 7. Substances with lower, or more acidic values, include lemons (2.2), wine and beer (4.0) and battery acid (1.0). Substances with higher, or more basic, pH values include bleach, as well as ammonia (11.0) and human blood (7.4). Bleach can be considered extremely basic at pH 12, and should not be allowed to contact bare skin.

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