Cumulative Exam — Cumulative exam Answers

Soil compaction results from _______.a.the reduction or elimination of pore space in soilb.the weight of heavy machinery on soilc.livestock walking over soild.all of the above

Which of the following is not a manmade cause of global warming?a.burning fossil fuelsb.deforestationc.respirationd.population growth

Which of the following statements about biodiversity is true? a. Changes to biodiversity always positively affect an ecosystem. b. Changes to biodiversity always negatively affect an ecosystem. c. Changes to biodiversity can positively and negatively affect an ecosystem. d. Changes to biodiversity never affect an ecosystem. Please select the best answer from the choices provided

Which of the following biomes are considered temperate biomes?a.deciduous forests and grasslandsb.chaparral and tundrac.rainforest and tundrad.alpine and deciduous forests

What types of organisms in an ecosystem will likely be affected by a flood?a.producers, consumers, and decomposers b.producers and consumers c.consumers and decomposers d.no organisms will be affected

All animals are _______.a.producersb.omnivoresc.herbivoresd.consumers

A fungus on the roots of a plant helps the plant absorb nutrients it needs from the soil, while the fungus gets what it needs from the plant. What type of symbiotic relationship is this?a.Mutualismb.Commensalismc.Parasitismd.Competition

Which of the following is an example of natural erosion?a.ice forming in cracks of rocksb.acid rain falling on sidewalksc.waves washing over rocks on the beachd.water washing away soil in an area used by off-road vehicles

There is a single instrument to measure climate change.

Wind, solar and geothermal power are called renewable energy sources because _______.a.tax breaks for these sources are renewed every yearb.they are continuously replenishedc.humans can replenish these sources periodicallyd.they produce few toxic byproducts