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What are the biggest polluters among the oil drilling companies?

People can suffer many different symptoms as well as long term health issues from exposure to these polluters, including skin rashes, headaches, digestive problems, lung disease, liver damage, brain damage and miscarriages. The heavy metals, such as lead, arsenic and mercury, are extremely toxic to humans and animals, even in very small proportions. For example, mercury is not excreted very quickly and builds up in tissue much faster causing toxic levels. One other polluter of oil drilling is corrosion of the piping used to extract the oil, as this can also contaminate the land and water surro..

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Why are asteroids, comets and meteoroids important to planetary scientists?

Asteroids formed at about the same time as the solar system did. Jupiter formed very early in the history of the solar system, and its incredible size and the accompanying gravity this size creates caused the asteroid belt between Jupiter and Mars to form. Without Jupiter’s gravitational influence, these rocks would have eventually coalesced into a planet.\nAn asteroid is thought to have struck the Earth approximately 65 million years ago, striking the Yucatan Peninsula in present day Mexico. This asteroid impact caused an enormous explosion, which altered the Earth’s climate for years. Ma..

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What are first-level consumers?

The lowest stage of the food chain consists of producers, which are basically organisms that are able to manufacture their own food. Plants are the only organisms that can make their own food and therefore all plants are producers.Right above plants are the first-level consumers, or herbivores, which are basically animals that feed on producers. Examples of first level consumers include grasshoppers, antelopes, rabbits and insects that feed on plants.Second-level consumers are those animals that feed on herbivores. They are sometimes referred to as carnivores, since they feed exclusively on fl..

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Why are skin cells undergoing mitosis continuously?

People shed an average of 30,000 to 40,000 dead skin cells per minute, notes KidsHealth. Cells on the innermost layer of the epidermis replicate and slowly move toward the top layer of skin. This process results in a completely new epidermis every 35 to 45 days, explains Penn Medicine.\nSkin forms an effective barrier against the outside world because the cells produce keratin, a tough protein also found in hair and calluses, according to UCSB ScienceLine. In addition to protecting against infection, skin also protects the body from ultraviolet rays from the sun, regulates temperature and prod..

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Are all volcanoes the same?

Volcanoes that are active erupt on a regular basis, while dormant volcanoes are considered inactive and aren't expected to erupt in the near future. Extinct volcanoes never erupt and aren't expected to ever erupt again. Some volcanoes have "quiet eruptions," meaning that lava spills out, but materials aren't ejected from the mouth of the crater. "Explosive" volcanoes have violent ejections that result in flying rock fragments, gases, ashes and lava.

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What are the subunits of lipids?

Triglycerides, or fats, are the most widely known types of lipids and are distinguished by how their fatty acids are bonded. Saturated fat contains long chains of single-bonded fatty acids, monounsaturated fats contain a double bond and polyunsaturated fats contain more than one double bond.\nOther lipids are built around chemicals other than glycerol. Cholesterol contains fatty acids linked through sterol, glycerophospholipids found in the brain use a phosphorous atom to link an amine and fatty acids and saccharolipids consist of fatty acids linked to a sugar.

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What are the two most reactive elements?

Electronegativity means that the atom lacks an electron and is eager to steal an electron from another atom. These atoms readily form compounds and are rarely seen in a free state.\nThough the elements themselves are very reactive and even dangerous to handle, they are able to form compounds so stable as to be inert. For example, when fluorine is bonded with carbon, the result is Teflon.

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What is the subpolar low polar front?

Subpolar low fronts are low pressure weather systems caused by the converging of cold air masses from higher latitudes and warmer air masses from lower latitudes.\nLow pressure systems are an area in which the atmospheric pressure is lower in comparison to the atmospheric pressure in the area that surround it. Low pressure systems are typically associated with warm air and high winds, along with atmospheric lifting. This translates to clouds, precipitation, and other stormy weather, including tropical storms and cyclones.\nHigh pressure systems are an area in which atmospheric pressure is grea..

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At what phase of mitosis do the chromatids become chromosomes?

During the anaphase of cell division, enzymes cause the bonds between sister chromatids to breakdown. This allows for the creation of individual chromosomes, which form new nuclear membranes around themselves before cytokinesis. During cytokinesis, the parent cell is forced to split apart, transferring a portion of the nuclear membrane around the new chromosomes. The cell membrane reacts to this process and pinches itself together until it splits apart and reforms around the genetically identical daughter cells.

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What is effort force?

An example of effort force is lifting the handles of a wheelbarrow filled with dirt. The hand acts as the effort force (lifting force), while gravity acts as the resistance force that must be overcome to lift the wheelbarrow. To get the wheelbarrow moving, the hand is still the effort force. However, the hand now acts as both a lifting and pushing force, while gravity acts as the opposing force.

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