What conditions are necessary for a lunar eclipse to occur? a. earth is in the moons shadow. b. the moon is in earths shadow c. the moon is in the suns shadow d. the sun is in the moons shadow

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above