greater than that of the Earth

　　24. According to the passage, the presence of chondrules in a meteorite indicates that the meteorite

　　has probably come from Mars

　　is older than the solar system itself

　　has not been melted since the solar system formed

　　is certainly less than 4 billion years old

　　is a small fragment of an asteroid

　　25. The passage provides information to answer which of the following questions?

　　What is the precise age of the solar system?

　　How did shergottites get their name?

　　What are the chemical properties shared by shergottites and Martian soils?

　　How volcanically active is the planet Jupiter?

　　What is a major feature of the Martian surface?

　　26. It can be inferred from the passage that each of the following is a consideration in determining whether a particular planet is a possible source of shergottites that have been discovered on Earth EXCEPT the

　　planet s size

　　planet s distance from Earth

　　strength of the planet s field of gravity

　　proximity of the planet to its moons

　　chemical composition of the planet s surface

　　27. It can be inferred from the passage that most meteorites found on Earth contain which of the following?

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