If a tree ring you are measuring is very thick, what does that mean?
a. that year was cold and dry
b. that year was warm and very dry
c. that year was warm and wet
d. none of the above

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit