what do scientists use to divide the geologic time scale? (a) major divisions in the fossil. (b) records major divisions in the sedimentary rock layers. (c) evidence for catastrophic events in earth's history. (d) major changes in mineral deposits in the rock layers.

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies? a. it's a region that exhibits a weak gravitational pull, thus maintaining a safe distance from the sun. b. it's an area that doesn't experience any major weather events that could cause mass extinctions. c. it's an area that's an optimal distance from the sun for potentially supporting life. d. it's a region that's unaffected by asteroid or meteor impacts.

Is an official language in every north african country

Who were the kelvin-rus? describe who influenced them.