Question

according to travelers guide to the solar system - saturn, which two moons have the best chance of life?
○ phobos and deimos
○ triton and enceladus
○ io and ganymede
○ enceladus and titan
closest to the sun; no atmosphere & wide range of temperature
○ geocentric
○ meteorite
○ mercury
○ meteor

Explanation:

First Question (4 points):

To determine the two moons of Saturn with the best chance of life, we analyze each option:

• Phobos and Deimos are moons of Mars, not Saturn. Eliminate this option.
• Triton is a moon of Neptune, not Saturn. Eliminate this option.
• Io and Ganymede are moons of Jupiter, not Saturn. Eliminate this option.
• Enceladus and Titan are moons of Saturn. Enceladus has a subsurface ocean, and Titan has a thick atmosphere and liquid methane/ethane, making them candidates for life.

We analyze each option based on the description "Closest to the sun; no atmosphere & wide range of temperature":

• Geocentric refers to a model where Earth is the center, not a celestial body. Eliminate.
• Meteorite is a meteoroid that has landed on Earth, not a planet. Eliminate.
• Mercury is the closest planet to the Sun, has no atmosphere, and experiences a wide temperature range (very hot during the day, very cold at night).
• Meteor is a streak of light from a meteoroid burning in the atmosphere, not a planet. Eliminate.

Answer:

D. Enceladus and Titan

Second Question (1 point):