Latitude and longitude

Here you can understand how imaginary lines work.

Learn about Planet Earth: latitude and longitude


Now, find Latitude and Longitude of any point of the map (including your own house and the School!)


http://www.findlatitudeandlongitude.com/

Day and night

This is a video about the Earth's rotation.



http://www.youtube.com/watch?v=pLl8sDZRSYg&feature=related

Eclipse

What is the difference between Lunar and Solar Eclipse?
Let's see it in these couple of videos.



Eclipse solar and lunar

What is an Eclipse?