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WorksheetsHuman Impact Practice
Total questions: 50
Worksheet time: 1hrs 16mins
problem caused by increased levels of CFC's in the atmosphere; living things are exposed to more UV radiation
global warming
thermal pollution
greenhouse effect
ozone depletion
Which of the following is NOT a possible result of decreasing biodiversity?
increased ecosystem stability
extinctions
loss of natural resources
loss of potential foods & medicines
Occurs when nitrogen and sulfur-containing compounds from burning fossil fuels combine with water in the atmosphere
global warming
ozone depletion
acid rain
thermal pollution
Which of the following ecological problems is NOT the result of burning fossil fuels?
global warming
ozone depletion
climate change
acid rain
Which of the following results when levels of CO2 in the atmosphere increase due to the burning of fossil fuels?
ecological succession
acid rain
ozone depletion
global warming
Human impact on the environment is often more dramatic than the impact of most other living things because humans have a greater
need for water
need for food
ability to alter the environment
ability to adapt to change
In some areas, foresters plant one tree for every tree they cut. This activity is an example of
lack of management of nonrenewable resource
a good conservation practice for renewable resources
a good conservation practice for nonrenewable resources
lack of concern for renewable natural resources
What has been the trend in the world’s human population numbers in the last 200 years?
It has increased at a slow, linear rate.
It has increased at a large, exponential rate.
It has maintained a balance due to slowing birth rates.
An example of a renewable natural resource is ______.
water
coal
oil
An example of a nonrenewable natural resource is ______.
trees
wind
coal
A substance that makes air, water, or land harmful for life is called ______.
a pollutant
an alternative energy source
an organic fertilizer
Biodiversity is a measure of the ______.
variety of nonliving things within an ecosystem
amount of resources shared by the human population
variety of species within an ecosystem
The greater the biodiversity of an ecosystem, the more easily it may recover.
True
False
Which chemical is most responsible for the depletion of the ozone layer in our atmosphere?
Carbon dioxide
DDT
CFC's
When cities protect natural habitats and conserve resources, they help to ______.
increase pollution in natural habitats
preserve biodiversity
reduce native species
Removing just one resource from a habitat can have devastating effects on an ecosystem.
True
False
House sparrows from England were released in the U.S. They have competed with native blue birds. These sparrows are examples of ______ species.
native
primary
invasive
Materials that harm the environment like pesticides and sewage are considered
politics
pollutants
biofuels
natural resources
The largest threat to biodiversity is
bacteria
humans
fungi
plants
The loss of a natural habitat is called:
Habitat Development
Pollution
Biodiversity
Habitat Destruction
What are the greatest problems facing plants, animals and people?
Introducing new species that can cause problems
Illegal hunting
Habitat desctruction
All of the above
Why does the populations of invasive species grow so quickly?
Invasive species are native to an area
Invasive species have no predators
Invasive species are prey to many animals
Invasive species keep the ecosystems in equilibrium
What makes a species invasive?
Moving to a new ecosystem and taking resources from natives
Species that cannot adapt
Not having prey
Plants that take up too much space
Climate change causes extreme weather conditions such as:
Flooding
Hurricanes
Heat Waves
All of the above
Why might an invasive species overrun a native species in an ecosystem?
Its population size is smaller than the native species
It is more energy efficient, so it eats less food
It is a predator of the native species
It often has no natural enemies in that ecosystem
Fishermen have harvested certain fish to the point where the population of that fish is decreasing. This overfishing could cause ...
ecosystems to be improved for future generations
ecosystems to be severely damaged
the restoration of environmental stability
all other fish species to increase in number
Which of the following pose a threat to biodiversity? Choose all that apply.
invasive species
habitat destruction
population growth
pollution
What makes a species "invasive"?
species that cannot adapt
making another species leave so that it can move in
moving to a new ecosystem where it does not naturally belong and taking resources from natives
taking up too much space
Extreme weather conditions, such as floods, forest fires, & hurricanes, are called _______.
climate change
precipitation
weather
natural disasters
What is the main way that invasive species get introduced to a new area?
too much food
human actions
weather events
moving there
Define biodiversity
variety of life in Earth's land, freshwater, and marine ecosystems
variety of ecosystems in a given area
the number of different species in a given area and the number of individuals of each species that are present
the variation of genes within a species or population in a given area
What will and abundance of resources often result in for an ecosystem?
growth of individuals and populations
grown of biosphere
decline of individuals and populations
decline of biosphere
A reduction in the variety of pollinating insects would negatively affect the plant populations that depend on them. Which of the following describes the most serious impact this would have on humans?
Plants that don't need insects to pollinate would die
Crops that humans use for food would be reduced
People would have to build new homes
There would be a decrease in the availability of soil
Image "B" shows more biodiversity than image "A". Why?
Because "B" shows more different species than image "A"
Because image "B" has less different species than "A"
"A" has a greater number of same species plants so this statement is wrong.
Both images show the same biodiversity
Information on brown tree snakes is provided along with information on the island of Guam. Brown tree snakes were first brought to Guam in 1950. The introduction of tree snakes has brought about changes to the ecosystem on the island of Guam. What is the best evidence of the change?
Several other species of snakes were known to live on Guam before 1950.
The population of lizards on Guam in 1960 was very small.
The longest brown tree snake ever found on Guam measured three meters in length.
Most of the military bases on Guam were closed in the 1980’s.
what happens to animals when humans impact there homes
decrease in population
increase in population
the population stays the same
Invasive species are:
non-native
harmful to an ecosystem
organisms that can lack predators in the new environment
all of the answers are correct
