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...write very big or very small numbers, and why it’s useful for communicating your results. Explaining negative numbers Negative numbers can seem hard to understand, but looking at different temperatures around the world shows that it's not that difficult. Why keep a journal Keeping a lab notebook is a vital skill for any scientist and beginners to the subject often...

...write: "Haunted", "He hangs out with a taxidermist", "A quarrel in Bahia Harbour". Out of Africa The Aftrican scientist Sheila Ochugboju reveals the vital importance of Charles Darwin to her own work. In the last century his ideas have been appropriated by a variety of different people for sometimes very different ends; today in Africa he is an inspiration for a new...

...write whole numbers and decimals in place-value columns and compare their sizes multiply and divide whole numbers and decimals by 10, 100, 1000 and so on indicate given fractions on a diagram and find equivalent fractions for a given fraction mark numbers on a number line choose appropriate units for a given purpose...Numbers, units and arithmetic: 1 The size of numbers -...