Too much calcium in a person's diet may result in
a. high blood pressure.
b. heart attack.
c. dehydration.
d. kidney stones

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.

other information encoded in your genes might distinguish you from the others in the group