Science Unit 12 Interdependency and Environmental Changes

If humans cleared a forest to build homes, we would expect _____________.

• fewer tree-dwelling animals
• increased insect populations
• more development of soil
• more frequent thunderstorms

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In which example does a nonliving factor affect an ecosystem?

• Insects destroy most of the trees in the forest

• A tornado uproots many trees in a neighborhood

• A beaver uses trees it cuts down to build a dam on a river

• People cut down trees to clear land for building homes.

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

• Animals in different parts of the ecosystem will be separated

• 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.

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How do the floods due to Hurricane Harvey Positively impact city of Houston?

• Fish will adapt to reproduce faster

• Many fish species will become extinct

• Many fish species will learn to escape fishing nets

• Fish will be caught more quickly with new fishing nets.

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The nesting habits of four types of birds are above. If all the dead branches and dying trees in a wooded area are removed, which bird's nesting habit would be most affected?

• Baltimore Oriole

• Barn Swallow

• Downy Woodpecker

• Belted kingfisher

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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

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too many of the same organism in one area

• native species

• overpopulation

• invasive species

• restore (restoration)

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organisms that entered a new ecosystem and multiplied, hurting native species and their habitats

• overpopulation

• inpact

• restore (restoration)

• Invasive species

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trees are cut down in large numbers to clear the land; this can lead to erosion and loss of soil

• impact

• restore (restoration)

• deforestation (clear cutting)

• invasive species

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problem that occurs when grazing animals like cattle and sheep eat too much vegetation (grass)

• habitat

• overgraze

• thrive

• global warming

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