Earth is the fifth largest planet in the solar system. It is the only planet with liquid water on its surface. The name "Earth" comes from Old English meaning "the ground". Earth is one astronomical unit away from the Sun
Poland's largest river, flowing 651 miles through 75,100 square mile basin. Source located 15 miles south of Bielsko-Biała at 3,629 feet altitude. Flows from south to north through mountains and plains to Baltic Sea. Connects with Oder via Bydgoszcz Canal and eastern European waterways
Coral reefs form in shallow oceans from algae and coral skeletons. Reefs consist of living framework and supporting structures. Sea grasses and algae trap sediment, creating beach and cays
Mushrooms are umbrella-shaped fruiting bodies of certain fungi. Edible mushrooms include portobellos, shiitake, morels, and truffles. Commercial mushrooms contain 90% water and essential nutrients. Wild mushrooms can be poisonous, requiring accurate identification
Eggshell is the outer covering of hard-shelled eggs and some soft-coated eggs. Nematode eggs have two-layered structure with chitin outer layer and lipid-rich inner layer. Arthropod eggs vary in shell type: gelatinous, protein-based, or choroid membrane
The Mississippi River flows 2,340 miles from Lake Itasca to the Gulf of Mexico. It is the world's fourth-largest river by discharge flow. The river's watershed covers 1,151,000 square miles across 32 states