> Ocean tides are caused mainly by the pull of the moon's gravity. High > tide occurs directly below the moon and, at the same time, on the > opposite side of the earth. The earth turns halfway...
Tide in, tide out
When the tide is in, a beach may be covered with water. When the tide goes out, tiny pools of water, often with a few sea creatures in them, are left among the rocks. "Get all the cargo aboard....
Wind over the water
If you've ever read a poem or story about the sea, you're sure to have read about waves. If you've ever been to a seashore, you've seen waves come rolling in to slap the sand with a splash. If you've...
The colors of the sea
A glass of water has no color. But the water of the sea looks blue in some places and green in others. And in some places it looks brownish, or reddish, or even yellow. Where does the sea get its...
The salty sea
A sailor who has spent much of his life at sea is often called an \"old salt." This is a sort of joke, meaning that the sailor has probably been doused with so much sea water that he has become...
The bottom of the sea
Have you ever wondered what's at the bottom of the sea? Well, it's land, of course. When the sea was formed, water filled the low parts of the earth and covered much of the land. So, there is land...
The birth of the sea
The sea may have been formed by tremendous rains. Or, it may have been formed by steam from inside the earth. Scientists think the earth was formed more than four and one-half billion years ago....
The world ocean
Look at a globe from the top or the bottom. You will see that all the oceans are really joined to one another and form a single body of water. More than three-quarters of our world is covered with...
The gift from the sea
Without the sea, there would be no life on the land. Snow, piled up on mountaintops, melts and trickles down mountainsides to become rivers. Rain and snow that fall to earth soak into the ground and...
The wonder of water
The sea is, of course, water---the stuff we drink, wash in, cook with, and swim in, and the stuff that falls from the sky when it rains. Water is so common we take it for granted. But it's actually...
- 1
- 2
