Astronomy Test #1

1. The time from noon until noon (average 24 hours)
6. Iron in the outer core creates an electric current that produces this type of field that protects the Earth
7. Boundary between the crust and upper mantle
8. (meridians), travels north to south, 0 degrees to 180 degrees, east or west, 0 degree prime meridian that runs through Greenwich, England
10. Consists of the crust and the top part of the mantle
14. December 21st; shortest day of the year
15. The separation of Earth into layers of different densities toward the center
16. Transverse waves that travel through the Earth

2. Area of molten rock and metal just beneath the Lithosphere
3. June 21st; the longest day of the year
4. (parallels), travels east to west, 0 degrees to 90 degrees north to south, 0 degrees at the equator
5. The bending of waves as they pass from a material of one density to a material of a different density
9. The time needed for the Earth to rotate relative to the stars being in the same position again
11. The point in which Earth's orbit is closest to the Sun
12. The point in which Earth's orbit is furthest from the Sun
13. Compressional waves that travel through the Earth