They weren't added as much as they were discovered to exist. They were added to the science books as observations were made that verified their existence.
Because over time new states were added to the country. Each star represents one of our 50 states.
Just one state was added to the US during the T Roosevelt Presidency. Oklahoma in 1907.
In the 1830s, the United States added three new states to the Union: Arkansas, which became the 25th state in 1836; Michigan, which was admitted as the 26th state in 1837; and Florida, which joined as the 27th state in 1845. These additions reflected the westward expansion of the nation during that period.
Yes, it allowed for a couple of new slave-states.
States were added in 1890 during the US centennial
Energy must be added or taken away.
Because over time new states were added to the country. Each star represents one of our 50 states.
For matter to change states, energy must be added or removed. In a solid-liquid phase change, energy is added to break intermolecular forces. In a liquid-gas phase change, energy is added to overcome intermolecular forces and increase kinetic energy.
The Northwest Ordinance of 1787
Howard Taft
Adolf Hitler
No new states and no new territory was added to the US while John Adams was President.
Two states were added to the Union during Taft's term; New Mexico & Arizona.
There were 48 states for the decade. No new states were added from 1912 (New Mexico, 47th and Arizona, 48th) to 1959 (Alaska, 49th and Hawaii, 50th).
When thermal energy is added or removed, the state of matter changes to another eg. solid becomes liquid and liquid becomes gas.
.Northwest Ordinance of 1787
Alot ;0