What are the effects of the event on each of the earths four spheres

Iwill make you brainliest pleeze answer this fast i have to turn it in really soon brainliest promise easy question 6th grade ! a weather map shows a high pressure system with circles around it. what does this mean? a) an occluded front b) areas of equal altitude c) areas of equal pressure d) a stationary front

There are only about 250,000 known fossil species. true or false

3differences between bacteria and other 2 cells