Chapter 6 - Human Impact

Which of the following is a major benefit of shifting from a hunter-gatherer population to an agricultural population?

• animals could no longer be domesticated

• more permanent housing could be built

• vegetables could only be eaten "in season"

• new areas could be explored

Some scientists think that global warming may be

• a natural variation in climate

• a result of human activities

• melting the polar ice caps

• all of the above

An increase over time of the average temperature of the earth is called

• greenhouse gases

• global warming

• greenhouse effect

• desertification

Which of the following is a possible result of deforestation?

• loss of animal habitats

• loss of possible new medicines

• loss of biodiversity

• all of the above

The brown haze in the atmosphere caused by pollution is calld

• extinction

• Acid

• smog

• soil erosion

Invasive species quickly take over an area because they?

• lack the natural population controls of native species

• lack solid repro

• quickly become prey

• lack the ability to adapt to their new enviroment

What is the best way to limit deforestation?

• plant and harvest trees on tree farms

• use

• fertilize the soil

• increase carbon dioxide levels

Invasive species are a problem because?

• they compete with native species and take over their area

• they

• they do not interact

• they become extinct easily

The green revolution was an attempt to increase the world's?

• defore

• food supply

• p

• population

The process of splitting habitats into pieces is called?

• habitat fragmentation

• habitat

• habi

• habitat revitalization