Yahoo奇摩 網頁搜尋

搜尋結果

  1. en.wikipedia.org › wiki › LimestoneLimestone - Wikipedia

    Limestone (calcium carbonate CaCO3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO3. Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place ...

  2. Free-air gravity anomaly over the Chicxulub structure (coastline and state boundaries shown as black lines) The Chicxulub crater ( IPA: [t͡ʃikʃuˈluɓ] ⓘ cheek-shoo-LOOB) is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is offshore, but the crater is named after the onshore community of Chicxulub Pueblo. [3]

  3. The Boundary Fire was a 2017 wildfire in Arizona that burned 17,788 acres (7,199 ha) of the Coconino and Kaibab National Forests. The fire was ignited on June 1 when lightning struck a spot on the northeast side of Kendrick Peak within the Coconino National Forest. The fire spread rapidly because of high temperatures, steep terrain, leftovers ...

  4. en.wikipedia.org › wiki › UluruUluru - Wikipedia

    Uluru ( / ˌuːləˈruː /; Pitjantjatjara: Uluṟu [ˈʊlʊɻʊ] ), also known as Ayers Rock ( / ˈɛərz / AIRS) and officially gazetted as Uluru / Ayers Rock, [1] is a large sandstone monolith. It outcrops near the centre of Australia in the southern part of the Northern Territory, 335 km (208 mi) south-west of Alice Springs .

  5. A sample of food-grade diatomaceous earth Scanning electron micrograph of diatomaceous earth Diatomaceous earth (/ ˌ d aɪ. ə t ə ˈ m eɪ ʃ ə s / DY-ə-tə-MAY-shəs), diatomite (/ d aɪ ˈ æ t ə m aɪ t / dy-AT-ə-myte), celite or kieselgur/kieselguhr is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder.

  6. en.wikipedia.org › wiki › Solar_panelSolar panel - Wikipedia

    Solar array mounted on a rooftop A solar panel is a device that converts sunlight into electricity by using photovoltaic (PV) cells. PV cells are made of materials that produce excited electrons when exposed to light. The electrons flow through a circuit and produce direct current (DC) electricity, which can be used to power various devices or be stored in batteries.

  7. Mount Everest [3] is Earth's highest mountain above sea level, located in the Mahalangur Himal sub-range of the Himalayas. The China–Nepal border runs across its summit point. [4] Its elevation (snow height) of 8,848.86 m (29,031 ft in) was most recently established in 2020 by the Chinese and Nepali authorities.

  1. 其他人也搜尋了