Starting out in Washington D.C The bearing that i would need to travel in to go to the Grand Canyon would be WWS ( West-west-south ) direction this is because The Grand Canyon is located in the west and Washington D.C is located in the East.
West-west-south direction is approximately 155 ⁰ ( 180 -25 ) when starting out from Washington D.C
W.R.T north the circle bearing is = 245⁰ ( 270 - 25 )
Plates at our planet's surface move because of the intense heat in the Earth's core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down