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  2. Ice - Wikipedia

    en.wikipedia.org/wiki/Ice

    The impact on global temperatures from losing West Antartica, mountain glaciers and the Greenland ice sheet is estimated at 0.05 °C (0.090 °F), 0.08 °C (0.14 °F) and 0.13 °C (0.23 °F), respectively, [154] while the lack of the East Antarctic ice sheet would increase the temperatures by 0.6 °C (1.1 °F). [156] [157]

  3. Phases of ice - Wikipedia

    en.wikipedia.org/wiki/Phases_of_ice

    The resulting form is metastable at room pressure while under 120 K (−153 °C; −244 °F), but collapses into ice I h (ordinary ice) when brought above 130 K (−143 °C; −226 °F). [78] The crystal structure is hexagonal in nature, and the pores are helical channels with a diameter of about 6.10 Å (6.10 × 10 −10 m; 2.40 × 10 −8 in).

  4. Freezing level - Wikipedia

    en.wikipedia.org/wiki/Freezing_level

    The 0 °C isotherm under normal conditions. The freezing level, or 0 °C (zero-degree) isotherm, represents the altitude in which the temperature is at 0 °C (the freezing point of water) in a free atmosphere (i.e. allowing reflection of the sun by snow, icing conditions, etc.).

  5. Melting point - Wikipedia

    en.wikipedia.org/wiki/Melting_point

    For example, agar melts at 85 °C (185 °F; 358 K) and solidifies from 31 °C (88 °F; 304 K); such direction dependence is known as hysteresis. The melting point of ice at 1 atmosphere of pressure is very close [3] to 0 °C (32 °F; 273 K); this is also known as the ice point.

  6. Freezing - Wikipedia

    en.wikipedia.org/wiki/Freezing

    The melting point of water at 1 atmosphere of pressure is very close to 0 °C (32 °F; 273 K), and in the presence of nucleating substances the freezing point of water is close to the melting point, but in the absence of nucleators water can supercool to −40 °C (−40 °F; 233 K) before freezing.

  7. Temperature - Wikipedia

    en.wikipedia.org/wiki/Temperature

    Temperature scales need two values for definition: the point chosen as zero degrees and the magnitudes of the incremental unit of temperature. The Celsius scale (°C) is used for common temperature measurements in most of the world. It is an empirical scale that developed historically, which led to its zero point 0 °C being defined as the ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Freezing air temperature - Wikipedia

    en.wikipedia.org/wiki/Freezing_air_temperature

    In the southern part of Finland, -15 °C (5 °F) is considered the limit of severe frost. The thermometer in the picture shows -17 °C (1.4 °F). The English word "frost" has 2 base meanings that are related to each other but nevertheless sufficiently different: temperature of air below the freezing point of water (ca 273 K)