Final answer:
The inventions that significantly impacted Westward Expansion and were invented in the post-Revolutionary period include the cotton gin, steamboat, telegraph, and railroad.
Step-by-step explanation:
The inventions that significantly impacted Westward Expansion and were invented in the post-Revolutionary period include:
- Cotton gin: Invented by Eli Whitney in 1794, the cotton gin increased the efficiency of cotton production, leading to the expansion of cotton plantations in the South.
- Steamboat: Invented by Robert Fulton in 1807, the steamboat revolutionized transportation on rivers and played a crucial role in the exploration and settling of the West.
- Telegraph: Invented by Samuel Morse in the 1830s, the telegraph facilitated communication across long distances, allowing for faster and more efficient coordination of transportation and trade.
- Railroad: The expansion of railroads starting in the mid-19th century dramatically transformed transportation and facilitated the movement of people, goods, and ideas across the country, including Westward Expansion.