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Cooler material is more dense and hotter material is less. This means that plates become more dense as they cool.
No, this material doesn't exist.
Gases, by definition, are the least dense state of matter. The material that is most dense will sink to the bottom. The material that is least dense will rise to the top. Gases are least dense so they will rise not sink.
Because it is less dense than the material that makes up the earth's crust, but more dense than the material that makes up the air.
The questioner.
it is the most dense thing because it is a squash peice of matter
There are a number of things that may happen to substances that are less dense than the surrounding material. In most cases, this is what will cause them to float on the surrounding material.
Food is an important household component. It isn't necessarily a household material. A household material would be more like something that cleans the floor, etc.
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The most dense material in the universe is stellar ash - the remains of a star that has come to the end of it's life. A teaspoonful of stellar ash would weigh on earth thousands - to millions - of tons.
Cooler material is more dense and hotter material is less. This means that plates become more dense as they cool.
the most dense material that is known Sound cannot pass through a vacuum.
less dense than the material of the Earth's mantle
No, this material doesn't exist.
No,it is certainly not, although it is one of the main contenders for "most dense substance on earth".
I suppose that on the Earth this element is platinum with a density of 21,45 g/cm3.