<span>d. Gunpowder
</span>Was the most important contribution of the Shang Dynasty?<em><u>d. Gunpowder</u></em>
NOT:
a. The Great Wall
b. Writing
c. Silk
He studied the fossils' age and how tall the mountains are. He also studied how old they are. I don't know about Coal Beds but he also used balloons to find out the continents were once a big supercontinent called Pangaea and they apparantly drifted apart
The Hartford Convention was a major factor that contributed to the decline of the Federalist party after the war of 1812.
Congress checks the president
