The reference point for longitude is
What will be an ideal response?
The Prime Meridian
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Radioactive dating methods and other dating methods indicate that hominids have been on Earth for about
A) 15 billion years. B) 5 billion years. C) 5 million years. D) 100,000 years. E) 5000 years.
Which of the following planets has the highest uncompressed density?
A) Mars B) Venus C) Mercury D) Earth
Which of these events is NOT possible?
A) low-mass stars swelling up to produce planetary nebulae B) red giants exploding as Type II supernovae C) close binary stars producing recurrent novae explosions D) white dwarfs and companion stars producing recurrent Type I supernova events E) a white dwarf being found in the center of a planetary nebula
In the Grand Unified Theory, the superforce was
A) only dark energy. B) a union of the strong and weak nuclear, and electromagnetic forces. C) only in effect at low energies. D) a union of all matter and energy. E) a union of the weak and electromagnetic forces.