Aquariums
Aquariums, or fish tanks, are beautiful to watch. It takes a lot of work to set up and tak...
Water is essential to life. Each human being needs at least thirteen gallons of water every day. We need it to drink, to cook, and to bathe. We need it for growing food, for producing electricity, and for sanitation. Most people in the United States have easy access to water. That is not true for many people in the world. More than one billion people cannot easily get clean water to drink. Some people have to buy their water. They must walk long distances and carry heavy jugs. This water is often expensive. Other people put cisterns, or large buckets, on their roofs to collect rainwater. This rainwater, as well as the water in lakes, rivers, and the polar ice caps, has been around for millions of years.
Aquariums, or fish tanks, are beautiful to watch. It takes a lot of work to set up and tak...
Molly had always heard of ghosts. Her friend, Zelda, said they were the spirits of dead pe...
Photosynthesis is a process that helps trees make energy. Trees need energy to grow. The p...