Mais conteúdo relacionado Ch 237. Rotation – the spinning of Earth around its axis that causes day and night Takes 24 hrs. or 1 day 8. Earth has a magnetic field with north and south poles 29. Moon Phases – the different forms the Moon takes in its appearance from Earth 30. New Moon – when the moon is between earth and the sun and cannot be seen 34. All of the Moon’s lit side is visible during a full moon 35. Waning phases – less of the illuminated half of the Moon is visible after the full moon. 39. What time period did we get from studying the moon? Completes its moon cycle in 29.5 days Completes revolution in 27.3 days 40. The moon’s orbit is tilted about 5 degrees relative to Earth’s orbit around the sun. 45. A total solar eclipse is visible only on a small area of Earth The corona is the silvery part 48. Lunar Eclipse – when Earth’s shadow falls on the moon What color does the moon turn during as eclipse? 49. Does not occur every month because the moon’s orbit is tilted to earth’s orbit. 51. The moon is 3,476 km in diameter, a little less than the distance across the contiguous United States. 53. The Moon’s surface has many depressions, or craters. formed from meteorites, asteroids, and comets 55. Cracks in the Moon’s crust caused lava to fill large craters, forming maria, or dark, flat areas Mountainous area called highlands 57. Regolith is the broken rock material on the moon’s surface. Moon rocks are similar to ours and have tiny crystals of pure iron. 58. Data from moonquakes suggest that under the Moon’s crust might lie a solid mantle, then a partly molten mantle and a solid, iron rich, core.