Pollution in Geography Quiz

Question 1In a tank, 840 mg of a dissolved substance is evenly mixed in 240 L of water. Find its concentration in mg/L, rounded to two decimals.

Enter a number in mg/L.

Answers within 0.005 mg/L of the expected value are accepted.

Question 2For an illustrative intake calculation, dose equals concentration times volume consumed. Water contains 0.6 mg/L of a substance and an organism consumes 0.35 L. Find the ingested dose in mg, rounded to two decimals.

Enter a number in mg.

Answers within 0.005 mg of the expected value are accepted.

Question 3A clear stream contains a detected unwanted chemical, but its effects have not been assessed. Which conclusion is supported?

The chemical’s presence establishes damage to fishContamination is established; harmful effects need investigationThe clear appearance establishes acceptable biological qualityA detected chemical identifies the industry responsible

Question 4After a spill, a contaminant binds to clay. What should investigators expect?

A conversion of the chemical into an inert clay mineralA stored reservoir that needs attention if conditions changeA release to air because attachment increases evaporationA loss of pollutant mass caused by settling into soil

Question 5Algal material decays after a nutrient-rich discharge. Why does oxygen in the water fall?

Fish stop using oxygen once algae have grownNutrients push oxygen molecules out by occupying their spaceMicrobes consume dissolved oxygen during decompositionDead algae turn the oxygen directly into nitrogen

Question 6Readings from a sensor are taken at midday while suspected releases occur at night. Which change best tests the concern?

Move the display indoors to stabilize the reported resultReplace the sampling dates with the permit’s issue dateAverage the midday values over a larger number of yearsSample when the suspected discharge is occurring

Question 7Outdoor lamps disturb nocturnal animals even though they release no waste material. How is this classified?

Nutrient enrichment caused by the brighter surroundingsSoil pollution from the weight of the lampsChemical contamination produced by visible photonsEnergy pollution through excessive illumination

Question 8A filter captures particles from exhaust. What remains to be managed?

The disappearance of the particles’ chemical elementsThe conversion of captured solids into clean waterThe collected residue and its disposal pathwayThe increase in exhaust flow demanded by conservation

Question 9A persistent substance is released repeatedly upstream of an administrative boundary. What defines the useful monitoring area?

The connected catchment and downstream receiving sitesThe outline of the upstream authority’s office districtThe location where responsibility changes between agenciesThe distance used to calculate each town’s property taxes

Question 10Two pollutants enter the same river, but sunlight rapidly transforms one and barely affects the other. What explains their different persistence?

Their chemical structures respond differently to the conditionsTheir concentrations determine identical breakdown schedulesTheir names determine how rapidly water removes themTheir travel distances must differ before either reacts

Answer every question to see and share your score.

Pollution in Geography Quiz

How does it work?

What will you get?