Whitch tow forces do siectests belive are responsible of tectonic plate motion

Gravity acting on the edges of plates and the friction between the plate and the asthenosphere

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.