What is the total volume of the world?
Total surface area of Earth is 510,082,000 sq. km. The oceans cover ~70.9%….Table 1. Volumes of the World’s Oceans from ETOPO1. Download Table 1 as a . PDF.
| North Atlantic | |
| Volume (km3) | 146,000,000 |
| % Ocean Volume | 10.9 |
| Avg. Depth (m) | 3519 |
| Max Depth (m) | 8486 |
What percent of the total volume of world’s water is estimated to exist in the oceans?
One estimate of global water distribution
| Water source | Water volume, in cubic miles | Percent of total water |
|---|---|---|
| Oceans, Seas, & Bays | 321,000,000 | 96.54 |
| Ice caps, Glaciers, & Permanent Snow | 5,773,000 | 1.74 |
| Groundwater | 5,614,000 | 1.69 |
| Fresh | 2,526,000 | 0.76 |
How much per cent of the total volume of world’s water is estimated to exist in oceans?
About 97 percent of Earth’s water is in the ocean. The ocean covers more than 70 percent of the surface of our planet. It’s hard to imagine, but about 97 percent of the Earth’s water can be found in our ocean. Of the tiny percentage that’s not in the ocean, about two percent is frozen up in glaciers and ice caps.
How much percentage of the total volume of world’s water is estimated to exist as freshwater?
The total volume of water on Earth is estimated at 1.386 billion km³ (333 million cubic miles), with 97.5% being salt water and 2.5% being fresh water.
Is the amount of water on Earth constant?
The amount of water on the Earth is constant, or nearly so. Actually, the amount is increasing ever so slightly due to volcanic eruptions expelling water vapor into the atmosphere, but, for all practical purposes, the amount of water (as a gas, liquid and as snow and ice) can be considered to be constant.
How did all the water get on earth?
Water is abundant in space and is made up of hydrogen created in the Big Bang and oxygen released from dying stars. Earth was moulded from rocks that came from the inner solar system where the fierce heat of the Sun would have boiled away any water. So, according to the textbooks, water must have come later.
What are the two types of water available on Earth?
The world’s water exists naturally in different forms and locations: in the air, on the surface, below the ground and in the oceans. Just 2.5% of the Earth’s water is freshwater, and most is frozen in glaciers and ice sheets. About 96% of all liquid freshwater can be found underground.
Which source of water is the best for human consumption?
Bottlers can only claim spring water if their product is verified to be from a spring. (Other bottles will say things like “purified” and “distilled.”) Like tap water, bottled water is generally safe to drink, although perceptions of it as “safer” than tap water are unfounded.
What are the 3 sources of water?
3.1 Types of water source. In Study Session 1 you were introduced to the three main sources of water: groundwater, surface water and rainwater. In arid regions where seawater is accessible (such as in the Middle East), desalination (the removal of salts from water) is used to generate drinking water.
Which is the largest source of water?
Oceans
What are the four sources of water?
Four sources of surface water sources : 1. Ocean water 2. River water 3. Lake water 4. Glaciers
- Ocean water.
- River water.
- Lake water.
- Glaciers.
Is tap a source of water?
Calling a water supply “tap water” distinguishes it from the other main types of fresh water which may be available; these include water from rainwater-collecting cisterns, water from village pumps or town pumps, water from wells, or water carried from streams, rivers, or lakes (whose potability may vary).
Is tap water treated?
Although the water doesn’t go through filtration, it is still disinfected with chlorine and ultraviolet light, with the usual sludge of chemicals added to control pH and prevent corrosion.
Is tap water acidic or basic?
Water, including tap water, has a pH of 7, or neutral. Alkaline water has a pH of up to 8 or 9. It can be naturally alkaline (for example, spring water can contain minerals that make it more alkaline), or it can be ionized to make it that way.
Why do they call drinking water potable?
If something is potable that means it’s safe to drink. The word comes from the Latin potare, meaning “to drink.” Not only did the Romans come up with that word; they built some of the world’s first aqueducts, above-ground channels that brought potable water from the mountains to the cities.
What are the 3 processes used to purify most drinking water?
The methods used include physical processes such as filtration, sedimentation, and distillation; biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination; and the use of electromagnetic radiation such as ultraviolet light.
Which water is safe for drinking?
Use bottled water or a different source of water if you know or suspect that your water might be contaminated with fuel or toxic chemicals. In emergency situations, use bottled water if possible; bottled water is the safest choice for drinking and all other uses.
Is tap water safe for human consumption?
In most cases, public drinking water sources like tap water are safe due to the strict contaminant limits set by regulatory agencies. However, drinking water can become contaminated from natural sources or human activity, affecting water quality (19).
How can you tell if water is safe to drink in the wild?
Look for animal tracks, swarms of bugs, and green vegetation nearby—if other living things are drinking from it, you probably can, too. Most of what makes water dangerous isn’t visible, and that’s true of taps as well as streams.
Why tap water is bad for you?
Chlorine is deliberately added to the US water supply to kill germs and pathogens, but when it mixes with other organic compounds it can create a few harmful byproducts. One of these byproducts, a group of chemicals known as trihalomethanes (THMs), has been linked to kidney problems and increased cancer risk.
Why Purified water is bad for you?
Because purified water tends to be acidic, it can only be recommended as a way of drawing poisons out of the body, or for short-term detox treatments. Once this is accomplished, continuing to drink purified water is generally a bad idea.