Science Fair
Sarah loved the science fair at school. She never won, but she always had fun. Every year,...
Comets are like big snowballs in space. They are mostly made up of frozen gases. Far from the sun, they are more solid. A comet kind of melts as it gets closer to the sun. It is also easier to see as it gets closer to the sun. This is because a comet absorbs and reflects the heat of the sun. The center gets surrounded by a cloud of gas. The cloud of gas is called a coma. When a comet gets even closer to the sun, particles and gases fall off the center, and the coma forms a tail behind the comet. A comet's tail can be up to 100 million miles long. For many years, people were scared of comets. They didn't know what they were. People thought they were a sign that bad things were going to happen. The most famous comet is Halley's Comet. It comes into view about every 75 years.
Sarah loved the science fair at school. She never won, but she always had fun. Every year,...
When you think of a diamond, you probably think of jewelry. Each diamond takes quite an ex...
During the Civil War, a large battle between two ships occurred in March, 1862. These ship...