What do we call air in the motion​

Is the alien theory a scientific claim? why or why not? just took the test it was , : " the alien theory is not a scientific claim because it is not based on valid data, there is no evidence to support it, and it does not come from a reliable source."

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

What is the coefficient of kinetic friction μk between the block and the tabletop?