Which of the following is an example of a scientific question that could be used to create an easily reproducible experiment? a. why do people like to watch television? b. does the mass of a rocket affect the distance it can travel? c. what makes the sky blue? d. does sugar or salt have a greater effect on plant growth?

I think that the key point here is the "easily reproducible" - because all of them can be scientific questions (even a! it could tell us about about the human psyche!)

but d. is the best answer for a reproducible experiment. B could also make a good experiment, but it would be too expensive to be easily reproducible. C is calling for a more complex analysis that is too complex for an experiment. And a would require more questionnaires than experiments

Yes you are cute answer theories to explain the colonization of the new world the last great habitable landmass to be occupied by humans focus on the bering land bridge, or beringia, which emerge by siberia and alaska the last ice age.