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WorksheetsChanges to Ecosystems
Total questions: 10
Worksheet time: 10mins
Which of the following would have a negative impact on an ecosystem
deforestation
planting trees
recycling paper
What do scientist call organisms that are not native to an ecosystem and cause harm to native organisms?
native plants
invaders
invasive species
natural species
When a certain population becomes too large, and it harms or changes the quality of life in that environment, we have an...
a population
overpopulation
pollution
Huge areas of the Amazon Rainforest are being cut down. What effect could this have on the carbon-dioxide/oxygen cycle if the removal of so many plants and trees continues?
Carbon dioxide levels increase
Oxygen levels increase
Carbon dioxide levels decrease
Nitrogen levels decrease
There are many large-mouth bass, a type of fish, living in a small lake near Waco, Texas. How would increased fishing in the lake effect the lake ecosystem?
Predators of the bass might starve due to loss of a food source
The population of the bass’ prey would decrease.
The bass would spend more time swimming near the surface
Water level in the lake would decrease as more fishing took place
What does it mean when an organism is endangered?
They completely die out
They are in danger of completely dying out
They are extinct
They are doing just fine
What does deforestation mean
When humans add poisons to the environment
When animals add poisons to the environment
When humans cut down forest trees
When forests grow high and beautiful
How does overgrazing by herbivores change an environment?
It causes a lot of erosion and vegetation(producers) can't grow.
It makes the land beautiful and lush
There is no problem when grazers eat too much grass
The grazers add nutrients to the land
