This is a great interactive site that provides answers to the following questions:
1. Where is the earth located in the Milky way Galaxy?
2. How is the earth different from other planets?
3. Where does the sky become space?
4. Where does sunlight that hits the earth go?
5. How do water and carbon circulate.
6. What type of substances is the earth made of?
7. What kind of land areas exists on the face of the earth ?
8. How big are the oceans of the world?