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Correct Answer: D) No known mechanism.
Correct Answer: A) Astronomy.
Correct Answer: A) Telescope.
Correct Answer: D) Gravity.
Correct Answer: C) Meteorology/climatology.
Correct Answer: A) Low-pressure funnel clouds that spin counter-clockwise.
Correct Answer: C) Geologists.
Correct Answer: B) Mantle plume.
Correct Answer: D) The theory that the continents can drift apart and have done so in the past.
Correct Answer: C) Silurian.
Correct Answer: A) Seismic waves.
Correct Answer: C) Alto.
Correct Answer: A) Building artificial levees.
Correct Answer: A) Geology.
Correct Answer: A) Lava.
Correct Answer: D) Earth revolving around the Sun.
Correct Answer: D) 3x older than our solar system.
Correct Answer: C) Upper mantle.
Correct Answer: A) Gutenberg discontinuity.
Correct Answer: D) Energy.
Correct Answer: B) A force that pulls all objects toward each other.
Correct Answer: B) P.
Correct Answer: B) Taken in by plants for photosynthesis.
Correct Answer: A) China.