What is lead? A heavy kind of metal
History of lead: A Roman anchor from Palermo, Italy What did ancient people use lead for? Lead is a kind of metal that is very heavy. (See if you can get some lead, [...]
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09, 2017
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08, 2017
What is mass? Physics
This truck has a lot of mass. Mass is a measure of the number of atoms in an object combined with the density of those atoms. Usually people measure mass in kilograms. You can tell [...]
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06, 2017
What is metal? Chemistry
Copper ore in Iran What is metal? Metals are atoms that attach themselves to other atoms in a particular way. Metal atoms, because of how their electrons are arranged, lose [...]
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06, 2017
Lead atoms – Elements and chemistry
A lump of lead, containing billions of lead atoms Where does lead come from? As with all of the other heavier elements, all of the lead in the universe came [...]
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06, 2017
Lead fishing weights – Science project
Lead weights used for fishing How heavy is lead? See for yourself how heavy lead weights are. Go to a sports store and get some small lead fishing weights (make sure [...]
