Notes

32 p. : col. ill. Introducing Our World -- What is the Earth? -- How old is the Earth? -- How does the Earth move in space? -- Exploring The Earth -- Where are the deep-freeze zones? -- What's inside the Earth? -- How are mountains formed? -- Is the Earth a giant magnet? -- How big are the oceans? -- What is the atmosphere? -- Is global warming a danger? -- What is the biosphere? -- Young Astronomer -- What are Earth resources satellites? -- - Earth Database -- Facts and figures Exploring our solar system