aridity
31a|rid|i|ty — «uh RIHD uh tee», noun. 1. no pl. arid condition; dryness; barrenness: »Aridity is increased by high evaporation, low humidity, strong winds (which remove humid air) and by low pressure (R. N. Elston). 2. no pl. Figurative. lack of interest, life …
32Ivy League — This article is about the group of colleges, and the athletic conference that gave the group its name. For other uses, see Ivy League (disambiguation). Ivy League (Ivies, Ancient Eight) Established 1954 …
34Dendrochronology — Drill for dendrochronology sampling and growth ring counting Dendrochronology or tree ring dating is the scientific method of dating based on the analysis of patterns of tree rings. Dendrochronology can date the time at which tree rings were… …
35Ubaid period — The tell (mound) of Ubaid ( ar. عبيد) near Ur in southern Iraq has given its name to the prehistoric Pottery Neolithic to Chalcolithic culture, which represents the earliest settlement on the alluvial plain of southern Mesopotamia. The Ubaid… …
36Köppen climate classification — The title of this article contains the character ö. Where it is unavailable or not desired, the name may be represented as Koppen climate classification. Updated Köppen–Geiger climate map[1] …
37Eemian interglacial — The Eemian interglacial era, now known as the Eemian Stage, is temporally equivalent to the Sangamon Stage in North America, the Ipswichian Stage in the UK, and the Riss Würm interglacial in the Alps) is second to latest interglacial epoch of the …
38Geology of the Capitol Reef area — [ Waterpocket Fold is the major geographic feature in the area of the park. This view is from above Capitol Reef Scenic Drive looking back at the west face of the broken and eroded fold.] The exposed geology of the Capitol Reef area presents a… …
39High Plains (United States) — Coordinates: 39°N 102°W / 39°N 102°W / 39; 102 …
40Evolutionary history of plants — Plants have evolved through increasing levels of complexity, from the earliest algal mats, through bryophytes, lycopods, ferns and gymnosperms to the complex angiosperms of today. While the simple plants continue to thrive, especially in the… …
