Question 1
Glaciation has been recorded ________.
◦ only during the Quaternary period
◦ only during times when earth has moved farther away from the sun
◦ only millions of years ago. The Ice Ages are nothing we have seen during human history
◦ at multiple times throughout Earth's history
Question 2
As an erosional agent, running water in arid regions is ________.
◦ not very important because it does not rain often
◦ not very important because desert sands do not easily get moved
◦ important because there is relatively little vegetation to anchor the sediment
◦ important because there is almost no wind in deserts so water erosion is all there is
Polar Nature of Water Molecules
Important Motor Regions of the Human Brain
Zhang Huan, To Raise the Water Level in a Fishpond.
Regions of the brain