Extracting Salt from Water Ocean water is salty. So if you were out on the ocean in a little boat and were thirsty, you would not be able to drink the salty ocean water. The salt in it will make one feel thirstier. In some places around the world, oceans dried up long ago and left the salt behind. You can show how salt is left, when the salt water evaporates....

How Soil Erodes What happens if you water a flower bed, without attaching a sprinkler on the end of the garden hose? The soil will probably scatter out of the bed, leaving big holes behind. This is why people use sprinkling cans and hoses to water flower pots and gardens. “Erosion” is the process by which soil is washed away from the surface of the earth, by the action of water....

Classifying Rocks No matter where you live, be it in the city or out on the plains, rocks can be found just about anywhere. There are various kinds of rocks in your community because they have been brought in your neighbourhood from different places. Rocks are used to make driveways, rock gardens and home decors. They are also used for landscaping, drainage, monuments and building structures. Collect twenty different rocks from...