Definition of density in a really simple kid friendly way .

Density is a measurement that compares the amount of matter an object has to its volume. An object with much matter in a certain volume has high density. An object with little matter in the same amount of volume has a low density.

Density is found by dividing the mass of an object by its volume.

p=m/v

where ρ is the density, m is the mass, and V is the volume.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.