Stones. Stones were not only the building blocks being used to create pyramids, they served as important tools as well. The two main stone types used in construction were limestone and granite. Low-grade limestone was used in creating the inner walls, while smoother white limestone was used on the outer walls.
Ok so <span>The astrolabe was adopted for sea-going
use when sailors learned that they could navigate by measuring the angle
between Polaris (the North Star) and the horizon.
so the answer will be
C
</span>
The public school students' <em>silent</em> protest, by using <em>symbols</em>, in the form of armbands, during school time, cost the students a suspension, because it was considered a <em>violation of a school rule</em>. After the case had been judged by the Supreme Court, they finally won the case. But the outcome could be different, if their protest used "indecent speech" or promoted illegal drug use.
