AP 1st 9 wks quiz

Which best describes how humans have altered natural systems?

I. Overhunted many large mammals to extinction

II. Created habitat for species to thrive

III. Emitted greenhouse gasses

• I only

• I and II only

• II and III only

• I, II, and III

Which does NOT describe a benefit of biodiversity?

• genetic biodiversity improves the ability of a population to cope with environmental change

• ecosystems with higher species diversity are more productive

• species serve as environmental indicators of global-scale problems

• speciation reduces natural rates of species extinction

Which of the following is an example of a biotic component of an ecosystem?

• soil

• water

• nitrogen

• sunflower

As a solid or liquid, water has its lowest density at

• 0 C

• 32 C

• 100 F

• 4 C

The Earth is regulated by feedback loops These loops are

• positive

• negative

• positive and negative

• in steady states

Which of the following is NOT an example of an anthropogenic factor?

• burning of fossil fuels

• volcanic eruptions

• over-harvesting of ocean resources

• deforestation for planting crops

Greenhouse gasses in the atmosphere help

• keep UV light from reaching Earth

• regulate temperatures near Earth's surface

• heat to be released back to space

• keep the ozone layer intact

The population of the US is 307,000,000. If Americans consume approximately 50 billion bottles of water each year, how many bottles is that per capita?

• 1

• 50

• 160

• 100

If there are 364,000 infants born per day and 152,000 people die per day, the net result is 212,000 new inhabitants on Earth each day. What is the approximate net gain of new inhabitants on Earth in one year?

• 1 million

• 77 million

• 10.5 billion

• just a few

A hypothesis is

• testable

• precise

• an observation

• known as scientific law