Forest: Why Forests are being destroyed
Forests are considered the lungs of the earth. They provide people and animals fresh air to breathe.
Category: Earth Science
Rocks: Properties of Rocks and Minerals
Differences between minerals and rocks A mineral is a naturally occurring solid with a definite chemical composition and a specific crystalline structure. A rock is an aggregate of one or more minerals. A rock may also include organic remains and mineraloids. Some rocks are predominantly composed of just one mineral.
The Constellations
The Egyptians are already had some knowledge about the motions of the sun, the moon, and the planets a long, long time ago. They believed that these were gods. They studied the positions of planets and stars so that they could foretell events.
Tides: High Tide and Low Tide
The position of the moon relative to the earth causes lunar tide. Tides are the rhythmic rise and fall of ocean or sea water caused by the combined effects of the rotation of the Earth and the gravitational forces exerted by the Moon and the Sun.
Recent Comments