Texas was annexed in 1845, and Oregon was Spain's territory.
Marquis de Lafayette helped to train the American colonists and even served in battle with them. Lafayette first came to the American colonies in 1777. Upon arrival, was appointed a Major General in the colonial army. From there, he taught the American colonists military techniques, strategies, and other important information needed to defeat the British. He even fought for the American colonists in the Battle of Brandywine. His help was imperative to the colonists success against the British.
"b. An atom is solid material" would be an example of something that is now considered scientifically inaccurate, since we now know that the atom is actually mostly open space.