People interfere with the natural flow of sediment in the coastal system. Explain two ways in which this is done
What will be an ideal response?
Answer: For instance: (1) By nourishing beaches by dumping or pumping sand just up current from the beach so the beach becomes wider and protects the shore better or allows better recreation opportunities. (2) Place groins at right angles to the shoreline. This slows the wave action behind them allowing some additional sand to be deposited. Unfortunately, both actions are expensive and do not stop the basic problem of more beach erosion than deposition in some areas.
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The first immigrants to the United States after the Native Americans came from
A. Asia B. Africa C. Southern Europe D. Northwestern Europe
A strong chemical bond in which electrons are shared rather than transferred or exchanged
(HINT: An example is the bond in quartz): a. covalent bond d. orogeny b. metallic bond e. ionic bond c. malleable
In developing nations, such as India and Nigeria, ________
A) small numbers of people have moved into the cities B) rural people are moving to the cities in large numbers C) very little change has occurred in the past 40 years regarding where people live D) most of the population is moving to the suburbs from the city centers E) more people are moving to the suburbs than to the city centers
Which of the following is not true about the Columbian Exchange?
A) rats and cats consumed ground-swelling birds B) beans, cacao, vanilla were brought to the Americas C) corn and cassava were brought to Africa D) potatoes were brought to Ireland E) Indigenous demographic collapse