Water (H
2O) is the most abundant compound on Earth's surface, covering 70 percent of the planet. In nature, water exists in liquid, solid, and gaseous states. It is in dynamic equilibrium between the liquid and gas states at standard temperature and pressure. At room temperature, it is a tasteless and odorless liquid, nearly colorless with a hint of blue. Many substances dissolve in water and it is commonly referred to as the universal solvent. Because of this, water in nature and in use is rarely pure and some properties may vary from those of the pure substance. However, there are also many compounds that are essentially, if not completely, insoluble in water. Water is the only common substance found naturally in all three common states of matter and it is essential for all life on Earth. Water makes up 55% to 78% of the human body.

Forms of water

H₂O is the chemical formula for water, ice or steam.

H₂O or H2O may also refer to:

Entertainment

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Other

See also

H₂O is the first album released by H₂O. It was released on June 25, 1996. The CD was recorded and mixed in 3 days. H2O did a video for "Family Tree" in the fall of 1996.

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Personnel

"Waterfalls" is a song by American recording group TLC. It was written by band member Lisa "Left Eye" Lopes with Marqueze Etheridge and Organized Noize for TLC's second album, CrazySexyCool (1994), featuring production by the latter. The song was released as the third single from the album on May 29, 1995 in the United States, followed by a United Kingdom release on August 5, 1995.

Often considered the group's signature song, "Waterfalls" reached the top five in many territories. The song spent seven weeks at number one on the Billboard Hot 100, giving the group their second U.S. number one. The song was the number two song of the year on Billboard's 1995 year-end chart. "Waterfalls" received critical acclaim, earning two Grammy nominations at the 38th Annual Grammy Awards in 1996 for Record of the Year and Best Pop Performance by a Duo or Group with Vocal. The song's central metaphor is similar to that of a Paul McCartney song of the same title, released 15 years earlier in 1980 on McCartney's album McCartney II.

A waterfall is a place where water flows over a vertical drop in the course of a stream or river. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf.

Formation

Waterfalls are commonly formed in the upper course of the river. At these times the channel is often narrow and deep. When the river courses over resistant bedrock, erosion happens slowly, while downstream the erosion occurs more rapidly. As the watercourse increases its velocity at the edge of the waterfall, it plucks material from the riverbed. Whirlpools created in the turbulence as well as sand and stones carried by the watercourse increase the erosion capacity. This causes the waterfall to carve deeper into the bed and to recede upstream. Often over time, the waterfall will recede back to form a canyon or gorge downstream as it recedes upstream, and it will carve deeper into the ridge above it. The rate of retreat for a waterfall can be as high as one and half meters per year.

Often, the rock stratum just below the more resistant shelf will be of a softer type, meaning that undercutting due to splashback will occur here to form a shallow cave-like formation known as a rock shelter under and behind the waterfall. Eventually, the outcropping, more resistant cap rock will collapse under pressure to add blocks of rock to the base of the waterfall. These blocks of rock are then broken down into smaller boulders by attrition as they collide with each other, and they also erode the base of the waterfall by abrasion, creating a deep plunge pool or gorge.

"Waterfalls" is a song by Nigerian-born Australian singer-songwriter and dancer Timomatic. It was released as a digital download in Australia on 13 September 2013. The song peaked at number 26 on the Australian Singles Chart.

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Charts

Weekly charts

Year-end charts

The Rain Remixes

On 11 October, Timomatic released a 6-track EP titled The Rain Remixes, which included five versions of "Waterfalls" and one of "Parachute".

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Release history

References