Earth orbit axis rotation tilt [information over pictures] [2]

However, at some point in history it is thought that Earth was in collision with another planet called Theia.	It is thought that most of Theia became part of the Earth. The debris is thought to have become the Moon.	However, the collision caused the Earth to develop a tilt of around 23 degrees. This animation shows how big that is.
So now the Earth rotates on its axis with a tilt of 23 degrees. The animation shows that the angle and direction of the tilt is always the same throughout the year.	An interesting fact is that most of the other planets have a similar tilt.

Look at all of the pictures in turn. As you hover over each one a blue screen appears with an explanation of what the picture shows. Important words are highlighted. If you are certain that you know about the picture click on it and it will disappear. As you go through all of the pictures you will get rid of all those which you know about and be only left with those you may be unsure of. In some cases you may get rid of all of the pictures in which case you are ready to move on to other activities which will test your knowledge on that particular topic.