Those elements are:
sulphur
chlorine
argon
neon
carbon
oxygen
helium
silicon
calcium
hydrogen
nitrogen
sodium
fluorine
lithium
aluminum
9 of these elements were known during BCE periods. The knowledge of these basic elements is enough for humanity to start the industrial revolutions by leveraging and combining one elements with another as a catalyze to be included either as ingredient of the products or to speed up the production process.
Answer: D. Taxes
Explanation:
Rome allowed many of its conquered nations to remain the same as long as they payed dues to the empire.
Answer:
Matels like Gold and Silver
Explanation:
The Sumerians were well known for their metalwork, a craft at which they were excellent. Most of the trading done in Ur (Sumerian city-state) as importing happened here. Imported goods hold valuable metals and semi-precious stones such as gold, silver, carnelian and lapis lazuli. Gold maintained for religious functions as well as in serving as personal ornaments, weapons etc.
Answer:
<h3>so they knew were they were on the battlefield and to communicate in the battlefield.</h3>
Explanation:
- The Standard, also called as Signum or Signa Romanum, used by the Roman soldiers was a flag or military ensign which identified a particular military unit.
- These standards were usually attached to a pole or staff and the soldiers carried it to identity between a cavalry and infantry.
- The Roman soldiers carried standards into battlefields so that they knew they were on the battlefield and to help them communicate in the battlefield with each other.
answer is about once a year
