. . "Presents information about various aspects of our planet in answer to such questions as \"Why do stars twinkle,\" \"Why are there mountains,\" and \"Why do earthquakes happen?\""@en . "Why do volcanoes erupt?"@en . "Juvenile works" . "Juvenile works"@en . . "Why do volcanoes erupt? : questions children ask about the earth" . "Miscellanea" . "Why do volcanoes erupt? : questions children ask about the earth"@en . "Presents information about various aspects of our planet in answer to such questions as \"Why do stars twinkle,\" \"Why are there mountains, \" and \"Why do earthquakes happen?\"" . "Why do volcanoes erupt? : questions children ask about the Earth" . . . . . . . . "Presents information about various aspects of our planet in answer to such questions as \"Why do stars twinkle,\" \"Why are there mountains,\" and \"Why do earthquakes happen?\" Suggested level: junior, primary." . . . . "Sciences de la terre Miscellanées Ouvrages pour la jeunesse." . . . . "Earth (Planet)" . . "Earth sciences Miscellanea Juvenile literature." . .