How can we use rocks to know how an area looked in the past

We can use rocks to see how the area looked in the past by feeling or seeing if its an old rocks rocks can have old markings on them or things people might have done in the past.

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!

2. x2 + 8x + 12 = 0 to prove: x = -6 or x = -2