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WorksheetsHumans in the Biosphere
Total questions: 15
Worksheet time: 8mins
Early hunters and gatherers in North America are responsible for
natural plant and animal populations.
a major extinction event of large animals.
producing new varieties of crops.
inventing technology such as manufactured tools.
The arrival of Europeans in the Hawaiian Islands changed the islands by introducing
Ranching
Predators
Disease
All of the above
A resource, such as air or parts of the oceans, that is open to anyone is often preserved and protected by
international organizations.
everyone.
the country in which it is located.
no one.
Which is a way to limit deforestation?
use more wood products
plant and harvest trees on tree farms
increase carbon dioxide levels
fertilize the soil
The sulfur and nitrogen compounds in smog combine with water to form
ozone.
ammonia.
acid rain.
chloroflurocarbons.
An example of a sustainable-use practice is the use of beneficial insects like ladybugs to
harm natural resources
pollinate plants
control unwanted pests
eat/destroy unwanted plants
The number of different species in the biosphere is called
biodiversity
ecosystem diversity
genetic diversity
species diversity
Biodiversity is valuable in the biosphere because it
gives us interesting things to look at.
tells us about many other species.
is the biological life-support system of our planet.
provides humans with resistance to disease.
One property that makes DDT hazardous over time is that DDT is
an insecticide.
a perfect pesticide.
nonbiodegradable.
deadly to herbivores.
All of the following are threats to biodiversity EXCEPT
biological magnification of toxic compounds.
habitat fragmentation.
invasive species.
species preservation.
As DDT moves up the trophic levels in food chains, its concentration
stays the same.
decreases.
increases.
is eliminated.
The goals of conservation biology include all of the following EXCEPT
wise management of natural resources.
protection and management of individual species.
preservation of habitats and wildlife.
introducing foreign species into new environments.
Protecting ecosystem diversity is a goal of
the green revolution.
conservation biology.
the captive breeding program.
the United Nations.
Some scientists think that global warming is
a natural variation in climate.
a result of human activity
melting the polar ice caps.
all of the above
The major cause of ozone depletion is
nitric acid.
sulfuric acid.
chlorofluorocarbons.
ultraviolet light.
