Answer:
Native American populations declined rapidly due to a lack of immunity to disease
Explanation:
At that time, many Europeans who came to American continent carried out viruses that could cause diseases such as smallpox, influenza, and measles within their body.
When they "Encountered" The native Americans, these viruses passed on to the Natives and infected them.
Because the natives have lack of immunity to disease (they never experienced diseases like that in their life) , the effect to their body is much greater compared to the Europeans. This led to large amount of death among Native Americans.
Answer:
The scientific method is the process in which, ideas in form of hypotheses, are tested against the real world through evidence which is obtained from observation of phenomena.
Explanation:
The scientific method is self correcting in the sense that, it involves coming up with an idea, then making an hypothesis, then making the observation which shall be tested against the idea. Further there is experimentation to confirm the validity of the hypothesis.
All of the above are testing mechanisms, that scientist use to provoke their idea with the real world facts, in the process, the idea might prove wrong and thereby shall have self corrected.
Scientific knowledge is cynical in the sense that, at each stage, we expect to prove the hypotheses wrong.
Answer: rail road option d
Explanation:
as the rail roads were used to transfer goods from one place to another
Hope this helps!
Answer:
a noble gas because it’s valence electron is full
2+8+8
Explanation:
He applied his skill in engineering to toughen up the defence
