yes
A lot of things are denser than water. It depends on how much water you are using.
The egg is heaver per volume than the water.
That depends what exactly is in the "dirt" .
Yes a football is heaver than a soccer ball.
We float or there is a possibility you can sink. You sink when you are heaver than the mass of the water. You float when you are lighter than the mass of the water.
no
no...not at all
a gollon
If it is heaver than water (or what ever liquid you put it in) it will sink. Lead will sink. A cork will float.
Yes, it is true.
There are 2,000lbs. in a ton
Water retains heat much better than soil, so in general the water will cool slower than the surrounding soil.