Which of the following statements best describes chemical weathering?
a. it always results in dome-shaped formations.
b. it happens only in cool environments.
c. it's the process by which rocks and minerals undergo changes in their composition.
d. it's the type of weathering in which rocks and minerals break down into smaller pieces.

The meseta in spain is a a. navigable river b. castle c. coastal plain d.plateau

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted

Which of the following statements best describes what is occurring in the land surrounding the sahara desert? a desertification is increasing, and the desert is expanding. b. fewer people are trying to farm in this semiarid region. c. the desert is shrinking with the increased use of irrigation. d. increased urbanization has resulted in decreased deforestation. select the best answer from the choices provided mark this and return save and exit next submit