Suppose we found a solar system with the property described. (These are not real discoveries.) In light of what you’ve learned about the formation of our own solar system, decide whether the discovery should be considered reasonable or surprising. Explain your reasoning.
A solar system has several terrestrial planets and several larger planets made mostly of ice. (Hint: What would happen if the solar wind started earlier or later than in our solar system?).

Suppose we found a solar system with the property described. (These are not real discoveries.) In light of what you’ve learned about the formation of our own solar system, decide whether the discovery should be considered reasonable or surprising. Explain your reasoning.
A solar system has several planets similar in composition to the jovian planets of our solar system but similar in mass to the terrestrial planets of our solar system.

Suppose we found a solar system with the property described. (These are not real discoveries.) In light of what you’ve learned about the formation of our own solar system, decide whether the discovery should be considered reasonable or surprising. Explain your reasoning.
A solar system has many rocky asteroids and many icy comets. However, most of the comets orbit in the inner solar system, while the asteroids orbit in far-flung regions much like the Kuiper belt and Oort cloud of our solar system

Suppose we found a solar system with the property described. (These are not real discoveries.) In light of what you’ve learned about the formation of our own solar system, decide whether the discovery should be considered reasonable or surprising. Explain your reasoning.
A solar system has four Earth-size terrestrial planets. Each of the four planets has a single moon that is nearly identical in size to Earth’s Moon

The graph above, shows the radioactive decay of uranium-235 to lead-207.
.What fraction of the original uranium-235 should be left after 3.5 billion years?
(a) $\frac{1}{2}$
(b) $\frac{1}{4}$
(c) $\frac{1}{8}$
(d) $\frac{1}{32}$
(e) $\frac{1}{64}$\