<html> <h3>Lead is a metal that can be easily used by us humans. It is soft and 'malleable', which means you can form and roll it into different forms and it is also 'ductile' which means it can be formed into wire.</h3> <h3>When it is exposed to air, it has a grey colour and the best part of it is that it is 'corrosion free' - we learned about rust/corrosion and how it can 'eat' away at metals.</h3> <p>https://www.youtube.com/watch?v=ibzHnVRrroI</p> <p>Since the ancient times, very very long ago, lead have been used, because it is easy to work with and it can be removed very easily from the rock you find it in which we call 'ore'. The Romans used it for plumbing pipes and also to join the limestone building blocks which they used in their houses and buildings.</p> <blockquote> Historically, tin and lead were hard to distinguish between. The Romans called lead 'plumbum nigrum' (black lead) and tin was called 'plumbum candidum' (bright lead). </blockquote> <p>Australia, USA, Canada, China and South Africa are all lead producing countries.</p> <p>https://www.youtube.com/watch?v=Uz0ObOAwncw</p> <p>It is very rare that pure lead will be found by itself in ore, it is usually with copper, zinc and silver.</p> <p>There are a few uses for lead, but more than half of the lead that is mined, gets used for lead acid batteries and electrodes. A lot of lead is also used in the building industry for gutters and roofs. Because it does not rust, it is also used to make the dive belts for divers. It can even be used to make bullets.</p> <p>Even though lead were use in earlier days in paint and make up it was later discovered that lead is a heavy metal and can lead to lead poisoning which can make you very sick.</p> <blockquote>Historically, lead has been used as a paint additive, in face whitening make-up, as water pipes, as a preservative for food and drink, as a pesticide, and in paint used on children's toys. However, due to its highly toxic nature, these uses have been stopped in most countries due to the dangers of lead poisoning. </blockquote> <p>https://www.youtube.com/watch?v=Ilw_HkR22GY</p> <p>We talk about the 'lead' in a pencil, but this is actually a graphite and not real lead. The Romans called it 'Plumbago' which meant 'mock lead'. </p> <p>https://imgoat.com/uploads/3db85ed909/85709.gif</p> <p> https://imgoat.com/uploads/3db85ed909/85708.png</p> </html>
| post_id | 64,540,999 |
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| author | alishi |
| permlink | types-of-metal-part-4-lead-information-for-kids |
| category | steemiteducation |
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| created | 2018-10-19 14:29:09 |
| last_update | 2018-10-19 14:29:09 |
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| post_id | 64,676,184 |
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| author | steemiteducation |
| permlink | re-alishi-types-of-metal-part-4-lead-information-for-kids-20181021t213226805z |
| category | steemiteducation |
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| created | 2018-10-21 21:32:27 |
| last_update | 2018-10-21 21:32:27 |
| depth | 1 |
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