Green World

Welcome back to Green World Today we're talking about nuclear fission. This energy source is quite controverial, so we're going to be looking at why. Before we begin, just a quick side note, there are multiple forms of nuclear power. This post is about nuclear fission. Nuclear decay is rarely used, most notably in some space missions. Nuclear fusion is currently being researched by scientists around the world and isn't used for commercial electricity yet. First, let's explain how nuclear fission actually works. This involves a lot of complicated chemistry and physics, but I'll do my best to explain it. Before anything else we need to look at what is in an atom. In this image, the grey represents negatively charged electrons, which circle the nucleus (plural: nuclei) in the center. The nucleus (blue and red) is made up of positively chargerd protons and neutrons (which are neutral). This means that the nucleus is positive. Th

Hi everyone, We're back with another endangered animal. This time it's a pigeon, but not the kind that we're used to seeing in cities. The tooth-billes pigeon, didunculus strigirostris, is the only remaing species of the Didunculus genus and is one of the closest living relatives of the world-famous Dodo. The adults have chestnut coloured bodies and wings, a greenish head and neck with red skin around the eyes, reddish feet and an orange bill with a characteristic jagges tip (hence the name tooth-billed). They are 31-38cm long and weigh about 400g. The juveniles are duller with a brown head and a black bill. Tooth-billed pigeons are shy and are belived to live in small groups. These terrestrial birds are endemic to the islands of Upolu and Savai'i. They are Samoa's national bird and can be found on the local currency. In Samoa they are known as Manumea and are eaten on a local and national level, but not internationally. They

Hello everyone, Today we're talking about Atlantic salmon. Atlantic salmon are found in the north Atlantic and the rivers that flow into it. They can grow up to a meter long and are classified as Least Concern by the IUCN . Atlantic salmon start their lives in rivers. The pea-sized eggs are laid in autumn and hatch in April or May. The tiny salmon are called alevins. They feed on aquatic invertabrates and eventually devolop into parr. Parr are easily recognised by destinictive patterns and markings on their flanks. After up to several years, the parr develop a silvery sheen. These replace those characteristic parr markings. Their bodies change in preparation for the salt water and they are now called smolts. They swim downstream with the current all the way to the ocean. In the deep sea waters, the smolts feed on crustaceans and small fish for 15-50 months. However they are hunted by a number of predators including, sharks, seals and of

Hello, This month's quiz is all about trees. Questions: What is the name of the network that trees use to communicate? a) the mycorrhizal network b) the mythcorhinia network c) the symbocommunial network How much of the amazon rainforest has been lost due to deforestation in the last 50 years? a) 12% b) 17% c) 23% True or False? Over 75% of land-based species are found in forests? How much carbon do tropical forest contain? a) 230 gigatons b) 280 gigatons c) 330 gigatons In California, there is a rather strange tree that has survived 13 000 years by cloning itself. What species? a) Pin oak ;b) English oak c) Palmer's oak True or False? The oldest surviving tree species, Gingko trees, have been around since just after the meteor that killed off the dinosaurs struck. Where do acacia trees grow? a) cold and ha