In climate change, a feedback loop is something that speeds up or slows down a trend. Positive feedback loops accelerates a trend whereas negative feedback loops slows it down. Based on the image of the artic ice is experiencing a _

• positive feedback loop because the rising temperatures are increasing the vanishing of the ice

• negative feedback loop because the rising temperatures are increasing the vanishing of the ice

• positive feedback loop because the rising temperatures are decreasing the vanishing of the ice

• negative feedback loop because the rising temperatures are decreasing the vanishing of the ice

The diagram shows a temperature inversion. Temperature inversions can impact weather conditions. Which is a consequence of a temperature inversion over the city

• Higher temperatures, create the heat island effect and lead to higher precipitation

• Higher risk of smog because the cooler air prevents pollutants from dispersing into the atmosphere

• Clear skies, mild temperatures, and pollutants are distributed through the atmosphere

• Lower pollutants because the higher precipitation distributes them to the ground

What happens during a temperature inversion?

• Warm air is trapped below a layer of cold air

• Cold air is trapped below a layer of warm air

• Smoke is trapped below a layer of clouds

• Clouds are trapped below a layer of smoke

If the pesticide gets rid of all the insects, what direct effect will it have on the food web shown above?

• A decrease in the mouse population

• An increase in the shrew population

• A decrease in the bat population

• An increase in the weasel population

Which environmental issue is directly addressed by the Clean Air Act?

• Ozone depletion

• Acid rain

• Vehicle emissions

• Industrial pollution

Which compound is known to interact with the Sun’s UV radiation, resulting in a breakdown of ozone?

• Chlorofluorocarbon

• Methylmercury

• Carbon monoxide

• Sulfur dioxide

In 2014, changes were made in the city of Flint, Michigan to lower the cost of providing drinking water. The changes caused lead concentrations to rise above the safe drinking level. What is the appropriate unit for engineers to use to report the concentration of lead in the water?

• μg/m3

• ppb

• kg/L

• %

Which greenhouse gases when in excess can contribute to global warming?

• Carbon dioxide gas and oxygen gas

• Oxygen gas and nitrogen gas

• Methane and carbon dioxide gas

• Nitrogen gas and carbon dioxide gas

What evidence supports that a temperature inversion has occurred?

• Temperature decreases as altitude increases

• Pollutants in the area increase

• Pollutants in the area decrease.

• Temperatures stabilize in the area

Which identifies a negative consequence of a hurricane hitting the Texas coast?

• Desalination of freshwater

• Adaptation of freshwater plants to saltwater

• Damage to local ecosystems by a sudden amount of excess rainfall and high wind

• Increase in seasonal tourism