You are planning an extended camping trip into an area where there is no electricity. the region is warm and sunny in the daytime but gets cold at night. suggest two ways you can use solar energy at your campsite.

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?