Ms. Block's students are studying chemical reactions as well as the law of conservation of matter. A classic reaction occurs when a metal is added to hydrochloric acid. Miguel and Kai are about to add 30g of hydrochloric acid (HCl) to 30g of magnesium (Mg) in a large test tube. How could you adapt the boys experimental design so they would definitely be testing the law of conservation of matter?

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.

glass wants to live in a world of super heroes and villains. he have lived all his life trying to be responsible for the creating the origin story of a super hero; he schemed and caused many incidents (many of them fatal) hoping that someday someone with superpowers would show up and save the day.

he knew himself very much. he saw himself as a villain of a real-life super hero story. he was aware of his strengths (more than smart enough for being manipulative and scheming) and weaknesses (having fragile bones and having to rely on his mind to succeed).

could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )