Answers questions about planet Earth, including how big it is, why the sky is blue, and what makes up the Earth's core.

Where is planet Earth? -- How big is Earth? -- Where on Earth are you? -- How old is our planet? -- Why does Earth spin? -- What is Earth made of? -- Does Earth move under our feet? -- How much of our planet is covered in water? -- Why is there life on Earth? -- Why is the sky blue? -- What makes our weather? -- Why is the moon important to Earth? -- Why do we have seasons? -- What is the hottest place on Earth? -- What is the coldest place on Earth? -- What is the deepest place on Earth? -- What does an earth scientist study?.