Which of the following represents the longest time period ? a. Precambrian
b. Paleozoic
c. Mesozoic
d. cenozoic

If a volcano’s magma is high in silica, the volcano will probably a. erupt quietly. b. remain dormant. c. erupt explosively. d. produce dark-colored lava.

The pyramid has a square base that us inscribed in the circular base of the cone. draw an image of the composite shape of the base. 2) if the side length of the square base is 8 units long, what is the diameter of the circular base of the cone from the picture in number 1

What are some of the impacts of humans on the earth?