5.9C Environmental Changes (2)

5.9C Environmental Changes (2)

Multiple Choice

Which of the following would most likely result in a decrease in the population of insect-eating birds that build their nest on trees?

• Overhunting of animals that prey on birds

• Observation of birds by scientist

• Introduction of a new type of insect

• Clearing of forests to build a highway

Multiple Choice

How will the construction shown above most likely effect the environment?

• Animals of the ecosystem will thrive

• Habitats on both sides of the road will be damaged by flooding

• Plants will stop growing in the cleared ground

• Populations of predators will increase in this region.

Poll

Do you ever litter? Be honest.

• yes

• no

Multiple Choice

Most incidents of pollution are deliberately caused by______.

• humans

• machines

• animals

Multiple Choice

Possible human solutions for limiting global warming and climate change are...

• being more energy-efficient

• using renewable sources of energy

• removing carbon from fossil fuel emissions

• all of the above

Multiple Choice

Scientists are concerned about overfishing of shark populations. Sharks feed on rays and rays feed on scallops. Without sharks, rays consume all the scallop beds. This situation demonstrates that:

• humans can improve an ecosystem by removing predators.

• humans can upset an ecosystem by removing species.

• reducing the shark population increases the quantity of scallops that can be taken.

• sharks are not important for the stability of the ecosystem.

Multiple Choice

A manatee is a water-dwelling herbivore on the list of endangered species. If manatees were to become extinct, what would be the most likely result in areas where they had lived?

• Certain producer organisms would become more abundant in the area.

• Other manatees would move into the area and restore balance.

• Predators in the area would have more food to eat.

• The area would not be affected.