Planet Earth Reading Challenge 2008
Tto read one book about each of these four parts of our planet, or two or three books on geology (since there are so many of them), and one on another topic.
- Lithosphere: the rocky (and molten) part of our planet
- Hydrosphere: the oceans and the water cycle
- Biosphere: evolution and the global ecosystem
- Atmosphere: our thin, blue blanket of air
Reading Challenges 