Human Impacts 2018-19 Question Preview (ID: 46568)


Human Impacts On The Environment. TEACHERS: click here for quick copy question ID numbers.

In some communities, forests are cleared through burning, and the deforested land is used for farming. Which of these is a negative consequence of this practice?
a) decreased plant and animal diversity
b) increased availibility of soil nutrients
c) greater access to water for plants and animals
d) less sunlight reaching the ground

Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the MOST likely outcome for the ecosystem?
a) Biodiversity would decrease, and sustainability would decrease.
b) Biodiversity would decrease, and sustainability would increase.
c) Biodiversity would increase, and sustainability would increase.
d) Biodiversity would increase, and sustainability would decrease.

Which of these is a threat to the survival of an ecosystem?
a) predator-prey population cycles
b) less biomass at higher levels of the food web
c) a shrinking variety of animal and plant species
d) competition among some consumer populations

Why is a reduction in biodiversity due to loss of plant populations especially destructive to an ecosystem?
a) Plants have the most biomass.
b) Plants are resistant to disease.
c) Plants are primary producers.
d) Plants are part of the food web.

Which of these explains why an ecosystem is healthy when it has a variety of species?
a) An increased number of species allows for fewer food chains.
b) A larger number of species reduces competition for abiotic resources.
c) A larger number of species allows for greater diversity in interdependence.
d) An increased number of species contributes to greater chances for adaptability.

Which of these living things in a grassland ecosystem depend on the presence of a variety of bacteria and other microorganisms in the soil?
a) worms only
b) green plants only
c) plants and animals only
d) all the organisms in the ecosystem

Which change in the environment would have a negative effect on the survival of a species in an ecosystem?
a) increase in the population of prey
b) introduction of competing species
c) decrease in the population of predators
d) increase in genetic diversity of the species

New Zealand is home to many flightless birds, such as the kiwi, which build their nests on the ground. Over time, ground predators such as possums have been introduced. Which statement could be a possible effect on the kiwi?
a) Possums could eat the eggs and reduce the number of kiwi chicks.
b) Kiwi could develop the ability to fly short distances to escape possums.
c) Possums could make the nests their home so the kiwi have to build new nests.
d) Kiwi could lay three times as many eggs to ensure the survival of their chicks.

Domesticated rabbits from Europe were brought to Australia. The rabbit population increased so quickly that it caused severe damage to agriculture and the natural environment. Which statement is the BEST conclusion from these events?
a) Human actions can lead to imbalances in ecosystems.
b) Humans use technology to help organisms adapt to new areas.
c) Rabbit populations decrease when they are placed in new areas.
d) Rabbits from other continents cannot survive in different ecosystems.

Nonnative plants can take over areas that were once populated by native plant species. Which abiotic process is LEAST likely to cause the invasion of nonnative plants?
a) flooding
b) weathering
c) dust storms
d) melting glaciers

When hunting by humans causes a species to become extinct, this may produce damaging effects throughout the ecosystem of the extinct species. What is the cause of this damage?
a) alteration of the food web
b) degredation of habitat
c) modification of climate
d) reversal of the flow of energy

Toxic chemicals flowing into a stream may also
a) pollute groundwater
b) create algae blooms
c) cause soil erosion
d) cause no changes to the stream

Which of the following will reduce a home electric bill?
a) using cloth napkins rather than paper towels
b) drying clothes on a clothesline on sunny days
c) keeping appliances plugged in when not in use
d) using incandescent light bulbs in the lamps

Which two behaviors BEST demonstrate stewardship?
a) reducing consumption, recycling wastes
b) increasing consumption, discarding wastes
c) reducing consumption, discarding wastes
d) increasing consumption, recycling wastes

Coal is used for generating about 53% of the electrical energy in the United States. Which of these environmental issues is directly contributed to by the burning of coal?
a) beach erosion
b) ozone depletion
c) overfishing
d) air pollution

Using solar panels to convert solar energy into electricity may help slow the depletion of which resource?
a) sunlight
b) water
c) coal
d) copper

Turning off the light when leaving a room is an example of
a) conserving energy.
b) wasting energy.
c) using potential energy.
d) using chemical energy.

Which could be a possible way to prevent wildlife species from becoming endangered?
a) drinking less water
b) establishing more habitats
c) cutting down more forests
d) stopping underground coal mining

The Miami Blue butterfly is an endangered species in South Florida. Which factor has MOST likely caused the population decline of this butterfly?
a) increase in the number of parks
b) decline in the amount of seawater
c) increase in the number of homes built
d) decline in the amount of predators

Which statement describes a harmful effect of clearing rainforests for farmland?
a) makes more land available for local farmers
b) removes valuable habitat for local species
c) increases local groundwater levels
d) provides income for local residents

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