The salinity in salt marshes can vary throughout the day because _______. a.river flow changes throughout the dayb.the amount of salt water in a marsh depends upon ocean tidesc.daily winds and rains result in salt and fresh water mixingd.salt water collects in the lowest elevations
Which of the following factors is least influential in affecting the biodiversity of wetlands?a.type of wetlandb.food abundancec.high levels of nutrientsd.water abundance
The urban migration trend has stopped worldwide.
The principal characteristic that differentiates temperate and tropical rainforests is __________.a.latitudeb.oxygen turn overc.the continent they are ond.longitude
The principle difference between where salt marshes and mangrove forests grow is _______.a.the salinity of the waterb.the amount of sunlight the plants receivec.the intensity of the waves along the coastd.the extent of human development in the area
Which of the following could be found on either public or private land?a.state parkb.single-family residencec.mined.factory
What record did the Nereus break in May 2009?a.It became the first remote operated deep-sea robot.b.It dove to a depth of 6.8 miles.c.It explored an undersea mountain.d.It took the first videos of deep sea organisms.
Which of the following oceans lies between North America, South America, Europe and Africa? a. Pacific Ocean c. Southern Ocean b. Atlantic Ocean d. Arctic Ocean Please select the best answer from the choices provided
Which of the following forest management practices keeps the forest in a state of mid to late succession?a.clearcuttingb.uneven-agedc.even-agedd.seed-tree cutting
Cities that have available space in surrounding areas, such as Los Angeles, are likely to experience upward growth rather than urban sprawl.
Where is the carbon taken in by plants during photosynthesis stored?a.the groundb.plant structuresc.the aird.all of the above
Rainforest deforestation is contributing to _______.a.a decline in global biodiversityb.the reduction of greenhouse gasesc.increased soil moistured.increased drug discoveries
Which of the following best describes what led to London’s “killer fog” in 1952?a.Pollution from the air contaminated the water supply which is what killed people.b.Millions of coal fires and stagnant air caused toxic fumes to build up in the air.c.Poor city design led to faulty ventilation in houses.d.Soot from forest and wildfires in the surrounding areas blew over the city.
What characteristic is important for plants found in saltwater wetlands?a.tolerance to high temperaturesb.tolerance to salinityc.a range of climate zonesd.all of the above
Which of the following is not true concerning cover crops?a.they prevent soil erosionb.they can fix nitrogen in soilc.they are sold as cash cropsd.they add organic matter to soil
Methane hydrates are _______.a.a potential new source of natural gasb.the largest reserve of methane on Earthc.releasing methane as the arctic warmsd.all of the above
Which of the following methods of agriculture is the most reliant upon technology and automation?a.rangeland grazingb.American agriculturec.traditional rice cultivationd.Dutch agriculture
Location plays a role in wetland type, but is not the sole determining factor.
Mangrove forests were traditionally viewed as _______.a.unproductive wastelandsb.valuable fish habitatsc.an erosion preventing habitatd.pollution filters
Which of the following is not a possible environmental consequence of urban sprawl?a.deforestationb.pollutionc.loss of natural resourcesd.none of the above
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