Game2, Round 3: Gee! Oh!

Each answer in this science round is a word beginning with the letters GEO.

1. This is a hollow concretionary or nodular stone, its inside surface
   often lined with crystals.

	geode

2. This field of study deals with the exact measurement of the Earth or
   large parts of it, traditionally by surveying, now often by satellites.

	geodesy or geodetics
	(also accept the adjective: geodetic.  Geodesic is wrong.)

3. What term is used for the ancient theory that the Earth is
   stationary with all the planets (including the Sun and Moon)
   moving around it?

	geocentric

4. In math, a doubling series such as 3, 6, 12, 24 is an example of
   what type of progression?

	geometric

5. This word refers to the nominal figure formed by sea level over the
   entire Earth -- you may think of it as the shape that the planet
   would have if the entire surface was liquid.

	geoid

6. Satellites are often placed in this type of orbit so that they
   remain constantly over one spot on the Earth's equator.

	geosynchronous, or more specifically, geostationary
	(accept either)

7. This mathematical term refers to the shortest path between two points:
   in Euclidean geometry it's a straight line; in spherical geometry,
   part of a great circle.

	geodesic

8. This giant edible clam, weighing up to 12 pounds, is found on the
   West Coast, especially in Puget Sound.  Its name, from the Indian
   language there, is suggestive of a type of bird.

	geoduck (correctly pronounced "gooey duck")

9. What is it called when someone desires to eat clay, chalk, or earth,
   perhaps because of a vitamin deficiency?

	geophagy or geophagism 

10. Name a biological term for gravitationally aligned growth or motion,
   toward or away from the Earth.

	geotaxis or geotropism
	(also accept the adjectives: geotactic or geotropic)