Reference Terms
from Wikipedia, the free encyclopedia
Acid
An acid (often represented by the generic formula HA) is traditionally considered any chemical compound that, when dissolved in water, gives a solution with a pH of less than 7.0.
Note: The above text is excerpted from the Wikipedia article "Acid", which has been released under the GNU Free Documentation License.
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Earth & Climate News
February 17, 2025
Feb. 11, 2025 — New research reports, for the first time, the widespread occurrence of biofluorescence in birds-of-paradise. The study, based on specimens collected since the 1800s, finds biofluorescence in 37 of the 45 known birds-of-paradise species and suggests ...
Feb. 10, 2025 — Earth's inner core is undergoing structural transformation. Located 3,000 miles below the Earth's surface, the inner core is anchored by gravity within the molten liquid outer core. Until now the inner core was widely thought of as a solid sphere. A ...
Jan. 30, 2025 — Researchers have directly linked population decline in polar bears living in Western Hudson Bay to shrinking sea ice caused by climate ...
Jan. 27, 2025 — Archaeologists have uncovered evidence that a house in England is the site of a lost residence of Harold, the last Anglo-Saxon King of England, and shown in the Bayeux Tapestry. By reinterpreting previous excavations and conducting new surveys, the ...
Latest Headlines
updated 12:56 pm ET
Feb. 13, 2025 — In tropical forests, endangered species inside protected habitats are still in danger from threats from beyond their sanctuaries, according to a new ...
Feb. 13, 2025 — People may be exposed to unhealthy levels of airborne pollutants inside their homes, even if the outdoor air quality is ...
Feb. 17, 2025 — Reintroducing wolves to the Scottish Highlands could lead to an expansion of native woodland which could take in and store one million tons of CO2 ...
Feb. 14, 2025 — In late July to October 2022, residents of the Manu'a Islands in American Samoa felt the earth shake several times a day, raising concerns of an imminent volcanic eruption or ...
Feb. 14, 2025 — The cool conditions which have allowed ice caps to form on Earth are rare events in the planet's history and require many complex processes working at once, according to new ...
Feb. 14, 2025 — In a study measuring neonatal intensive care unit (NICU) admissions and satellite-based air pollution data, newborns exposed to higher levels of NO2 have a 30-35% higher risk of NICU admission and an ...
Feb. 17, 2025 — A rare discovery of a nearly complete skull in the Egyptian desert has led scientists to the 'dream' revelation of a new 30-million-year-old species ...
Feb. 13, 2025 — Nanoplastics -- plastic particles smaller than 1 m -- are widely dispersed because of their low weight. A research team now shows the extent to which glaciers at an altitude of more than 3,000 m in ...
Feb. 13, 2025 — Researchers have developed a reactor that pulls carbon dioxide directly from the air and converts it into sustainable fuel, using sunlight as the ...
Feb. 13, 2025 — The possibilities for material design and production of plastic components are being expanded through 3D printing technology. However, there is a shortage of recyclable polymers that meet the ...