Tim is given a powdered sample of a mixture of lead nitrate and silica sand. When this mixture was added to water, he notices that the amount of powder decreases. So Tim has used
to separate the components of the mixture.
A)
density
B)
melting point
solubility
D)
temperature

The correct answer is a. when they started making tools that will them in cultivating lands, they could raise crops and that made them attached to one place for a longer period of time. after that, they started domesticating animals and building their own permanent settlements that resemble the ones we have today.

Joke: i thought it said drake and josh at first answer: probably unsure about this law. depending on how long the time is.