Answer: it contributed the use of new basic materials, chiefly iron and steel, (2) the use of new energy sources, including both fuels and motive power, such as coal, the steam engine, electricity, petroleum, and the internal-combustion engine
Explanation:
Answer:
YES, it is a PRIMARY SOURCE
Explanation:
Because it was written by someone who was there. Also because it uses first person perspective making it primary source
Answer:
ionic
Explanation:
covalent shares electrons
ionic gives or takes electrons (anions and cations)
also this is a chem question :)
The answer is D. I hope this helps and you have an amazing day! :D