How many acute , obtuse , right angles in this trapezoid ? click to see shape and answers .

Topographic maps are used to measure a-composition b-movement c-elevation d-texture

Which statement explains what upwelling causes? a. upwelling causes tides to rise and fall. b. upwelling causes changes in the direction of currents. c. upwelling causes nutrients, minerals, and tiny organisms to rise. d. upwelling causes currents in the pacific ocean to change direction. i think the answer is c.

The layers of earth are based on what two sets of characteristics?