What will fall faster a 1 pound of sand or 1 pound of bricks?

Answer 1

The brick falls faster through the air than loose sand because each grain of sand has to overcome air resistance which is proportionally larger for the small particles.

If you put both brick and sand into the same size box then they will fall at the same rate.

Answer 2

Both the 1 pound of sand and the 1 pound of bricks will fall at the same rate in a vacuum, following the laws of gravity. In the absence of any external forces, objects of different weights fall at the same rate due to gravity, as popularized by Galileo's experiment at the Leaning Tower of Pisa.