Earth Day is this weekend, which means that there's really no better time to learn about our planet.
After all, it's important to understand the place where we live, especially with all of the recent talk centering around climate change. Once you gain a level of understanding, you then have the power to use it for good and to protect the planet for future generations.
If you paid attention in science class, you just might remember a few of these facts. So test your knowledge about the earth, and let us know how you did!