How much of the earths heat is produced by the Sun and internally?
• has human activity altered the mass of the Earth? • What did the Earth look like as it was forming? • Do you weight differently at the North Pole than what you do at the equator? • Exactly when is the earth nearest the sun? • At what altitude would the Earth atmosphere have the same pressure as on Mars? • Can you say more about the new moonlet discovered in orbit around the earth in 1997? • What is the Earth’s average temperature? • How can I find out my exact geographic location? Intermediate: • What would happen if the magnetic field of the Earth suddenly changed? • What would happen if the rotation axis of the Earth suddenly changes? • If the Earth left the Sun’s orbit, would we be able to tell immediately? • What would happen to your weight if you traveled to the center of the Earth? • If the Sun mysteriously vanished, what would happen to the Earth? • What would happen if the Earth were suddenly stopped in its orbit? • If the Sun suddenly became a black hole, what would happen t
