How do geologists fill gaps in the rock record?

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.