1. What happened to the gas that made up the much thicker atmosphere in the distant
past, and what happened to the abundant water? What role did Mars’ small size play in
these changes?
Most of the gas and water on Mars was stripped away due to solar ejections from our sun. Mars' small size and weak gravity meant that it didn't have enough gravitational pull to keep its atmoshpere from being stripped away.
2. What is synchronous rotation, and why is it so common among the Jovian moons?
A synchronous rotation is when a moon's, or other body's, rotational speed matches it's orbit. The same of the moon would always face in towards its planet. Jovian planets are the largest in our solar system, and synchronous rotations occure with very massive objects that have a strong pull, making its moons fit into those todal forces.
3.What are redox reactions? Give a couple of examples.
Redox reactions, or reduction-oxidation reactions, are chemical reactions where electrons are transfered between atoms, a change in their oxidation state. Wood burning is an example of a redox reaction; carbon transfers electrons to the oxygen in the air. Combustion is a quick example, but this can occur over longer periods of time as well. The oxidation of iron, or rusting, is another example of a redox reaction where the electrons are transfered from the iron to the oxygen.
Redox reactions, or reduction-oxidation reactions, are chemical reactions where electrons are transfered between atoms, a change in their oxidation state. Wood burning is an example of a redox reaction; carbon transfers electrons to the oxygen in the air. Combustion is a quick example, but this can occur over longer periods of time as well. The oxidation of iron, or rusting, is another example of a redox reaction where the electrons are transfered from the iron to the oxygen.
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