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...carbon and oxygen. Chlorine, bromine, sulfur and phosphorus are also non-metals. Living organisms are made of mainly non-metallic elements. Scientists have tended to formalise the characteristics of metals (as distinct from non-metals) by suggesting that metals are dense, lustrous (shiny), good conductors of heat and electricity and can be shaped by physical forces....

...the animation. So where do we go from here? Now we've seen something of what data is available, and how we can start to visualise it, we can start to explore some of the issues surrounding international development, from population growth to GDP, mortality rates to carbon emissions. So with chart types in mind, and data to find, let's move on to Looking at Population Data...

...carbon dioxide and sugar, osmotic pressure, redox potentials and pH. The methods used to maintain body temperature can be divided broadly into two types. Animals that rely predominantly on internal metabolic processes as a source of heat energy generally maintain a stable body temperature that is precisely regulated. They are known as endotherms or homeotherms. Those...

...footprint in the lunar regolith[.] Right: a large fractured boulder flung out by a relatively recent impact and resting on the surface of the lunar regolith[.] The astronaut in the lower left provides the scale The highlands are the first lunar crust to have formed, probably by crystals rising to the surface of the 'magma ocean' thought to have covered the young Moon as a...