# Vector Or Scalar problems

Identify each of the quantities below as Vector or Scalar.
Speed of a train. (Vector)
Volume of a cube. (Scalar)
Acceleration of a rocket. (Vector)
Mass of a pint of milk. (Scalar)
Velocity of a train. (Vector)
Force of gravity. (Scalar)

I put my answers in parentheses but im not really comprehending the definition of vectors and scalars.My homework wont give any hints of what i got wrong.Can somebody help me see where im going wrong at.