Ascientific theory is proposed after several valid investigations. this makes scientific theories

elaborate descriptions of observations
the most powerful explanation scientists have to offer
unchangeable by other scientists over a period of time
unacceptable to a majority of scientists

Why might have people followed the rivers to find their way into asia

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor. b. increased mechanization has increased the need for water, thereby increasing the need for labor. increased mechanization has increased the use of land, thereby increasing the need for labor. d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.

Dose local topography and sea surface temp contribute to differences in climate between baeious localities