Why is an index contour different from other contour lines?   a. it indicates a greater change in elevation.   b. it is drawn more darkly on a topographic map.   c. it signifies where elevation begins to decrease.   d. it shows the elevation from which other points are measured.

Which conditions did austria demand of serbia after the assassination of archduke ferdinand? check all that apply. 1. swearing allegiance to the triple alliance 2. accepting responsibility for the assassination 3. turning over control of its military operations 4. surrendering half of its most fertile lands 5. suppressing anti-austrian groups and publications

True or false: abraham lincoln delayed the emancipation proclamation to make sure the border states would stay loyal. *

What are the 6 steps in the scientific method