Kerry Hetherington, age 8 of Allentown, Pa., for her question:

HOW DEEP IS THE SEA?

Imagine an enormous hollow in the ground. It has sloping sides and the deep floor at the bottom has plenty of bumps and ditches. Your imaginary hollow is like one of the great basins that holds the water of the salty sea. Naturally the water is very shallow along the shores.. It gets deeper down the sloping sides of the basin. In most places the floor at the bottom is more than two miles deep. But some of the plunging ditches are more than six miles deep.