The ____ coincides with the period known as the little ice age of Europe and North America. This provides one piece of evidence that suggests a link between solar activity and the amount of solar energy Earth receives.
a. Maunder sunspot minimum
b. Babcock sunspot model
c. coronal hole
d. Coulomb barrier
e. weak solar force
Question 2
Helium fusion does not begin until the star has entered the giant region of the H-R diagram.
Indicate whether the statement is true or false