15. D is correct, exothermic reactions release heat
I am not sure about 16
Volume=Mass over density. V= 220/55. V=4cm^3
These rocks were either roasted or exposed to severe weathering
In order to decrease the chances of deception in acquiring a handwriting sample, what the law enforcement do is that, they ask they person to write as little as possible, write the passage only once and also gather the material that consist some of the similar words and phrases as the suspected document. Answer for this would be all of the above.
