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Oceanography
Oceanography, also called marine science, is the study of oceans. It includes the study of physical oceanography, marine chemistry, marine geology, and marine biology. Areas covered in oceanography are the shape, depth, and distribution of oceans, and also their composition, life forms, ecology, and water currents, as well as their legal status. If you would like to know more or share your knowledge about oceanography, ask and answer questions here! Includes questions related to the study of Earth's oceans and seas.
1,839 Questions
What percent for the world is water?
the oceans are 100% water... lol
If you're talking about pure water, without salt or liquid waste, probably about 97%... I'm not sure what the salt-to-water ratio is, but it does fluctuate depending on what part of the ocean you're drawing your sample from.
What is the king fish of the ocean?
Believe it or not, there is a fish called the lion fish. The lion fish is the king of the sea as the loin is the king of the jungle (which is a misconception because lions don't live in jungles).
What are two most common ions found in ocean water?
Any two ions held together make up salt. In fact 'salt' a simple name for ANY ionic compound.
Most likely you were referring to 'table salt' or what is commonly referred to as just salt.
Table salt is sodium chloride (NaCl) which is an ionic solid (and therefore is one of the many salts).
The two ions in it are Na+ and Cl- .
How does carbon dioxide affect ocean water?
Temperature changes affect the solubility of CO2. Carbon dioxide is more soluble in ocean water due to the ocean temperature being low.
How do glaciers cause weathering?
When does a deep current form?
A deep current forms when water masses sink and flow horizontally along the ocean floor due to differences in temperature and salinity. This creates a slow-moving, deep-sea current that can transport large amounts of water and nutrients over long distances in the ocean.
What percent is drinkable water?
According to a nature article on cnn only 1%! http://archives.cnn.com/2000/NATURE/01/03/millennium.water/
A pleathorea of sounds, just go trackside and listen, from the piercing note of a horn, to the roar of the diesel engine to the click-clack of the wheels on the joints in the rail to the squeal of steel wheel on steel rail, there are hundreds of sounds to enjoy. "Choo Choo" doesn't cut it, sorry. Only the ignorant can agree that any train ever made this sound.
What happens to the amount of light as you go deeper in an aquatic system?
- If you can hear thunder, the lightning strike has already occurred since thunder is only a sonic boom caused by lightning. In order for you to feel an electric shock an electric current must pass through your body. For a current to pass through your body, your body must complete the circuit from an electrostatically charged cloud to earth/ground (in this example the ocean is the electrical earth/ground). Salt water is a great conductor of electricity/lightning and thus would immediately discharge the lightning strike. Unless the strike actually hits you, you are not in the circuit and would therefore feel nothing from a strike into the ocean - no matter how close. Consider the case of a bird perched on a high voltage supply line (maybe 440,000 volts). The bird is charged with 440,000 volts of electricity alright, but there is no circuit to ground/earth/ocean, thus the bird is not electrocuted and feels nothing.
- The sea is not like your bath tub, as the sea is much much larger than even a very big bath tub. After all, there is lightning hitting some part of the oceans some place, some where, every minute of every day, isn't there? If it were just like dropping a radio into a bath tub, then people playing in the ocean at Virginia Beach would be shocked to death whenever lightning struck the water off the coast of South Africa. But we know that doesn't happen. Water has resistance. Salt water has a lower resistance than drinking water, but it does have some resistance. That resistance is cumulative per unit of volume of water. As the distance grows from the strike point to the observer, the amount of energy observable is less.
- Resistance is not the major determination whether the one feels it, it is dependant on the voltage and current in that strike (changed by how far electricity has to travel, humidity, size of clouds, etc.). To see why, look at how lightning works: friction, among other things, releases negative electrons in the sky. In a storm this charge of electrons that have no place to go become attracted to the positive charged earth and take that leap. They hit the water and spread. Everything that has room takes an electron (ionizes) and the charge dissipates. My speculation is that after 100 feet or so you probably wouldn't feel it too much. Is someone going to jump in the water during a storm? It isn't recommended.
- Salt water is a much better conductor than fresh. Salt water contains positive and negative ions (Na+ and Cl-), which lower its resistance. Fresh water, which contains fewer ions to transport charge, will have a higher resistance. Thinking about it a little longer: V=IR, where V = voltage, I = current, and R = resistance. In the case of a lightning bolt, I would imagine you could consider it a two resistor system, the water between you and the strike being the first resistor, and you being the second. Voltage will be supplied by the lightning bolt. The voltage will drop after traveling through the water. If there is enough voltage to provide a large enough current through yourself then you will feel it.
- What a person will feel (1ma), will kill them (10ma) is not directly based on distance from the strike, it is based on the voltage gradient (across the person), which is determined by the distance from the strike and the other paths that the charge can take to Earth. So, it is not linear or easily calculated because of the many different variables.
- First, pure water is an insulator. Salt and impurities make it conduct. Second, you cannot separate voltage, current and resistance. They are related to each other. The voltage of the lightning strike, along with the resistance of the water determines the current allowed to flow. Current is limited by resistance. Current can be increased by increasing voltage or decreasing resistance. Therefore, the distance from the strike will increase resistance and therefore decrease current; voltage will drop as well (as in a voltage divider circuit). There are several laws that I can think of, (multiples of resistance, etc) that would probably help answer the question, but it's just not that simple. It's not even known why lightning "chooses" the path it takes in the first place. Bottom line, if you can see lightning, get out of the water.
What are the 3 types of carbon dioxide?
Three types of carbon are diamond, graphite and graphene. Diamond is the hardest type of carbon so far. It is widely used in various industrial applications.
The ocean is changing due to climate change, resulting in rising sea levels, ocean acidification, and warming waters. This has consequences for marine ecosystems, including coral bleaching, loss of biodiversity, and altered migration patterns for marine species. Human activities such as overfishing and pollution also contribute to these changes.
In a symbiotic relationship what happens to the organisms?
In symbiotic relationship two animals have a understanding between them for food, shelter etc eg. the algae depends upon the fungus for shelter whereas fungus depends upon algae for food.
Or to phrase the question differently, "Who discovered the correct explanation for the phases of the moon." I too would like to know. Did ancient astronomers know that the moon was reflecting the sun? Did they further discern that the phases were a result of seeing half-illuminated sphere from a different angle.
This drawing by Galileo suggests that he had it figured out, but was he the first: http://commons.wikimedia.org/wiki/Image:Galileo_moon_phases.jpg
What do you call the waves of energy formed by an earthquake?
Potential energy is transformed into seismic waves during an earthquake :)
What is an ecosystem that contains both salt water and fresh water?
Sorry for this short answer... Earth.
A briny water ecosystem can contain both salt and fresh water, though it is all mixed together. These ecosystems are where a fresh water source, such as a river, meets a salt water source, such as an ocean. River deltas commonly have briny water.
What is an example of water's high specific heat capacity?
the riasing of one cumulative degree in the sybrotoamic substance by excolling one specific diographm in the cromosome of the subject , which means raise 211 degrees to 212 to make water boil.
Do both the Arctic and Antarctic contain salt water or fresh water?
The Arctic ocean, and the Southern Ocean that surrounds Antarctica, are both salt water.
The ice sheet that covers 98% of the continent of Antarctica holds about 70% of the earth's fresh water.
What do you call water that is half salt water and half freshwater?
The mixing of fresh water and saltwater is called brackwater or brackish water.
Contrast salt water and fresh water?
Fresh and salt water are very different for one key reason, fresh water doesn't contain salt and salt water obviously does. There are different flora and fauna in fresh and salt water for this reason.
Is ocean water acidic or basic?
Neither.
On a pH scale, 7 is neutral, with 0 the most acidic and 14 the most basic. The historical pH of sea water is about 8.16, leaning on the basic side of the scale. While it doesn't seem like this is a problem, the pH of our oceans has fallen to 8.05 since the beginning of the Industrial Revolution, a change greater in magnitude than any time in the 650,000 years before the Industrial Revolution. The pH scale is also logarithmic, so that slight change in pH results in a 30 percent increase in acidity.
Which layer of the Earth takes up the most of Earth's volume?
The mantle is the layer of the Earth that occupies the most volume, accounting for about 84% of the Earth's total volume. It is located between the core and the crust and is mainly composed of silicate rocks.
The most important dissolved elements in ocean water are?
The most important dissolved elements in ocean water are sodium and chlorine, which together make up the majority of the salt content (salinity) of seawater. Other important dissolved elements include magnesium, calcium, and potassium. These elements are essential for marine life and play a key role in ocean chemistry.
Does the presence of salt helps prevent oceans from freezing?
Salt lowers the freezing point temperature, it does not completely prevent freezing. Otherwise we would not have sea ice.
