Unit 3 Review

Over the past two hundred years, the human population has ____________________________

• remained fairly stable
• increased rapidly
• decreased rapidly
• none of the above

Which of the following has had an impact on human population growth over the past 200 years?

• improvements in medicine
• improvements in sanitation
• improvements in agriculture
• all of the above

The current human population is approximately ______________________.

• 1 million
• 8 million
• 8 billion
• 8 trillion

Energy resources formed through heat and pressure over millions of years from the remains of once-living organisms are called _____________________.

• fossil fuels
• nuclear fuels
• geothermal fuels
• hydroelectric fuels

A fossil fuel in solid form is called _________________.

• oil
• natural gas
• coal
• uranium

The excavation of earth for the purpose of extracting fossil fuels, ore, or minerals is called ________________

• agriculture
• overgrazing
• mining
• deforestation

Fossil fuels are considered a ____________________ resource.

• renewable
• nonrenewable
• geothermal
• wind

Which of the following is NOT considered a renewable resource?

• solar
• coal
• wind
• hydroelectric

An increase in the percentage of people living in cities is called_________________________.

• ruralization
• deforestation
• urbanization
• sustainability

The primary cause of deforestation is ___________________.

• selective cutting
• mining
• agriculture
• wind energy