Among scientific observations by Song intellectuals was
a. the explosion of the Crab Nebula in 1054
b. the discovery of sun spots
c. invention of a zero for mathematic calculations.
d. retrograde motion of Mercury.
e. recirculation of blood through the arterial system.
ANSWER:
a
You might also like to view...
How did reformers seek to improve urban life?
What will be an ideal response?
An essay by Henry David Thoreau indicative of transcendental literature was:
A) Walden. B) Nature. C) Leaves of Grass. D) The Scarlet Letter.
In the beginning, the Civil War was a __________
A) struggle to free the slaves B) struggle to preserve the Union C) personal struggle between Abraham Lincoln and Jefferson Davis D) struggle to preserve "King Cotton" E) struggle over control of new and future territories
How do historians evaluate evidence to determine whether it is reliable?
What will be an ideal response?