Changes to Environment

Which of these activities is most likely to have a negative impact on Earth's environment?

• Planting Trees

• Constructing highways

• Recycling paper and plastic

• None of the above

What effect would building a highway have on an ecosystem?

• Increase butterfly migration

• Decrease in destruction of habitat

• Increase in Carbon dioxide

• Increase in oxygen

Scientific evidence predicts events that will occur because of overpopulation of grazers. Which of the following is NOT a change caused by the overpopulation of grazers?

• Grazers have less food to eat.

• Grazers wonder into unnatural habitats.

• Grazers have access to unlimited resources.

• Grazers are susceptible to more diseases.

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

• Wildfire rangers minimizing disturbances

• A lumber company clearing a forest

All the following are ways humans can adversely change the ecosystem EXCEPT

• waste dumping

• using biodegradable products

• overhunting animals

• industrial pollution

Hunting is an environmental management tool that helps control wildlife populations. Hunting is an example of

• the deer population creating a change in an ecosystem

• the food chain creating a change in an ecosystem

• humans creating a change in an ecosystem

• a cycle creating a change in an ecosystem

During the construction of a mall, a lake was filled in. This would have the greatest negative effect on organisms that -

• hunt for berries

• live in water

• sleep in trees

• burrow in soil

An Oregon truffle is a type of fungus that grows underground in moist soil near fir trees and reproduces using spores instead of seeds. Which of the following environmental changes would likely cause a decrease in the truffle population in an area?

• More than average rainfall in a forest

• Counting and recording the amount of truffles

• Wind spreading the truffles' spores all around

• Cutting down the fir trees and planting crops

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 might starve due to loss of food source

• Population of bass' prey would decrease

• Bass would spend more time swimming near the surface

• Water in the lake would decrease due to more fishing in the lake

The ecosystem of some dairy cows includes the fields in which they graze, eating the grass they need. Too many cows can be harmful to their ecosystem because they could -

• produce too much milk

• scare away predators

• raise the temperature

• remove all the vegetation