Saturday, September 29, 2007


A river is a natural waterway, which moves water diagonally the land from upper to lower elevations, and is a main part of the water cycle. The water within a river is generally from rain through surface runoff and release of stored water in natural reservoirs, such as groundwater.

The beginning of a mountain river from their resource, all rivers run downhill, naturally terminating in the sea or in a lake, during a flowing together. In dry areas rivers sometimes finish by losing water to evaporation. River water may also gain access to the soil or pervious rock, where it becomes groundwater. Extreme abstraction of water for use in industry, irrigation, etc., can also source a river to dry before reaching its natural boundary.

Monday, September 24, 2007

Solar System

Solar System consists of the Sun and the other space objects gravitationally bound to it: the eight planets, their 162 known moonsthree currently recognized dwarf planets (including Pluto) and their four known moons, and billions of small bodies. This last group includes asteroids, Kuiper belt objects, comets, meteoroids and interplanetary dust.

In wide terms, the charted regions of the Solar System consist of the Sun, four terrestrial inner planets, an asteroid belt composed of small rocky bodies, four gas giant outer planets, and a second belt, called the Kuiper belt, collected of icy objects. Beyond the Kuiper belt lies the scattered disc, the heliopause, and eventually the hypothetical Oort cloud.

Monday, September 17, 2007


In tennis, grass is grown on very hard-packed soil, and bounces may vary depend on how healthy the grass is, how recently it has been mowed, and the wear and tear of recent play. The most famous grass tennis court in the world is Centre Court at Wimbledon. Tennis, however, is generally played on clay courts, and only a a small number of regular tennis tournaments are played on a grass court. The exterior is less firm than rigid courts, causing the ball to spring back lower, and so players must reach the ball quicker. Due to high maintenance costs however, grass courts are now rare as they must be watered and mowed often, and take a longer time to dry after rain than hard courts.

Monday, September 03, 2007


Gerbera L., is a genus of ornamental plants from the sunflower family. It was named in honour of the German naturalist Traugott Gerber, a friend of Carolus Linnaeus. It has approximately 30 species in the wild; extend to South America, Africa, Madagascar, and tropical Asia. The first scientific description of a Gerbera was made by J.D. Hooker in Curtis Botanical Magazine in 1889 when he described Gerbera jamesonii, a South African species also known as Transvaal daisy or Barberton Daisy.

Gerbera species bear a large capitulum’s with striking, 2-lipped ray florets in yellow, orange, white, pink or red colors. The capitulum’s, which has the look of a single flower, is actually composed of hundreds of individual flowers. The morphology of the flowers varies depending on their position in the capitula. Gerbera is very popular and widely used as a decorative garden plant or as cut flowers. The domesticated cultivars are mostly a result of a cross between Gerbera jamesonii and another South African species Gerbera viridifolia.