The planet Mars has a mass about one-tenth the mass of Earth. Even though Mars has two moons, their tidal forces have a much weaker effect on Mars than Earth’s moon does on Earth. Why do you think this is? Use the data in the tables to support your prediction.

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The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Sound is a disturbance that travels through a medium as a