Human Impact

A human activity that causes habitat fragmentation is

• Urban development

• soil erosion

• Desertification

the breaking of habitats into smaller pieces is called...

• habitat division

• habitat pollution

• habitat corruption

• habitat fragmentation

What is causing many animals, such as the box turtle's habitat to be fragmented?

• houses

• streams

• powerlines

• roads

As roads increase in number, how does this affect the population size of organisms living in that habitat?

• Decrease, then increase

• Overall decrease

• Increase exponentially

• Increase, then decrease

Biodiversity refers to

• extinct species
• the variety of species on Earth
• nonrenewable resources
• the rate of species decline

Invasive species have a negative impact on...

• the ecosystem
• the economy
• Both the ecosystem and the economy
• None of these

Why do the populations of invasive species grow so quickly? 

• Invasive Species are native to an area. 
• Invasive species are prey to many animals.
• Invasive species have no predators.
• Invasive species keep the ecosystems in equilibrium.

An endangered species is

• One whose numbers are so small that it is at risk of extinction
  
• One whose not been spotted after many years.
• One whose numbers are abundant.

Something that worsens the quality of air, water, or soil is called a ______.

• population
• ecosystem
• biodiversity
• pollutant

New fuels are being produced by converting corn and grasses into compounds containing alcohols that can be broken down for energy in various engines. The purpose of this research is to

•  reduce the use of nonrenewable resources.
• increase the rate of air pollution.
• reduce the rate of homeostasis in organisms.
•  cause a loss of biodiversity in the rain forests.