Study the population density map on page 439. Where are the largest concentrations of people in North
Africa? Why are they concentrated there?

Which descriptions refer to fog? check all that apply. burns off when it gets dark forms at or near the ground extends up to 10 miles into the sky found in areas near bodies of water forms when the ground warms at night after a cool, dry day

What first caused people to consider that the continents were once one large landmass?

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?