Since its formation 4.5 billion years ago, the Earth has undergone numerous changes and transform...
Image: SlideplayerHave you ever wondered why in the world there are different schedules between c...
One of the most important chemical elements for humanity is oxygen since, without it, human being...
Image: Infoeducacion.esOur schedule is tremendously influenced by day and night, these two period...
Man has intervened and created a system to try to control time and in this lesson from a PROFESSO...
We encourage you to learn about the movements of our planet, the Earth, with this simple video le...