Copernicus had the solar system with sun in the center in a model. * geocentric universal global heliocentric

Which of the following is not a benefit of green revolution? a) new crop varieties b) increased crop yields c) cost effective d) new crops may require larger amonts of water than the previous ones.

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

What claim did thorne make? what evidence supported his claim?