The major processes that heat the interiors of the terrestrial worlds are
A) (1 ) Heat deposited as the planets were built from planetesimals; (2 ) heat of accretion; (3 ) heat that came from the gravitational potential energy of incoming planetesimals.
B) (1 ) Heat of accretion; (2 ) heat from convection; (3 ) heat from thermal radiation.
C) (1 ) Heat deposited as the planets were built from planetesimals; (2 ) heat deposited as the planets underwent differentiation; (3 ) heat released by radioactive decay.
D) (1 ) Volcanism; (2 ) tectonics; (3 ) erosion.
Question 2
Most of the energy produced in the Sun is released in the form of visible light from the photosphere. However, some energy is released from the upper layers of the solar atmosphere.
Which of the following best describes where other forms of light are released? A) The chromosphere is the source of ultraviolet light, and the corona is the source of X-rays.
B) The chromosphere is the source of infrared light, and the corona is the source of ultraviolet light.
C) The chromosphere is the source of X-rays, and the corona is the source of radio waves.
D) The convection zone is the source of ultraviolet light, and the upper photosphere is the source of X-rays.
E) Radio waves can pass directly through the gas which allows us to see the core.
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