Quiz #132 Effects of Change in Ecosystem

Which of the following activities has a positive effect on the environment?

• recycling

• deforestation

• pollution

• overgrazing

A meadow has too many rabbits. What would help balance this ecosystem?

• more rain that grass needs
• more foxes that eat rabbits
• fewer foxes that eat rabbits
• more grass for the rabbits to eat

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How would an ecosystem change if the rabbits that were the main prey for foxes became sick and died?

• The foxes would find new prey.
• The number of foxes would increase.
• The number of foxes would decrease.
• The foxes and rabbits would compete for food.

Which human activity will help conserve Earth’s natural resources?

• leaving the television on all day 
• recycling plastic bottles
• cutting down trees 
• burning trash in the yard 

A large amount of oil was spilled in a lake environment. Within a few weeks, the number of plants and animals living in the area where the oil was spilled will most likely.

• decrease

• increase

• remain the same

• none of the above

How does too much fishing in an area affect its ecosystem?

• The fish will lay many more eggs to replace fish caught
• organisms that eat fish could become endangered due to starvation
• organisms that eat the fish will become endangered
• people could eat too many fish and become ill

Humans are part of the ecosystem and therefore impact it.  Which of the following events in an ecosystem may produce a negative effect?

• preventing deer from depleting food resources
• restoring a natural habitat
• wildlife rangers minimizing disturbances
• a lumber company clearing a forest

When a certain population becomes so dense and large that it harms or changes the quality of life in that environment, we have...

• a population

• overpopulation

• pollution

• none of the above

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
  

If a disease destroying barley plants in a field swept through an ecosystem, what would happen to the barley eating bird population in the the field ?

• The bird population would stay the same

• The bird population would increase fast

• The bird population would decrease

• The bird population would increase slow