Urban Heat Islands Quiz

Question 1Matched shielded stations read 28.6 °C in a built-up area and 24.8 °C at the rural reference at the same time. Find urban minus rural temperature in °C, rounded to one decimal place.

Enter a number in °C.

Answers within 0.05 °C of the expected value are accepted.

Question 2An illustrative 7500 m² site has 1800 m² of planted ground. What percentage is planted? Enter percent, rounded to one decimal place.

Enter a number in %.

Answers within 0.05 % of the expected value are accepted.

Question 3A satellite map highlights a hot roof, but a nearby shielded thermometer reads lower. What explains the difference?

The satellite measurement is faulty because the thermometer reads lowerThe instruments observe different parts of the thermal environmentThe thermometer samples the roofing material after calibrationThe map reports the indoor conditions beneath the tiles

Question 4A masonry district stays warm after sunset under calm, clear weather. Which mechanism helps explain this?

The masonry’s heat capacity is consumed as the district coolsThe temperature contrast requires traffic to increase after duskDark paving continues to absorb sunlight throughout the nightEnergy absorbed earlier is released from the built fabric

Question 5Canopy cover shades a waiting area, but dry soil restricts transpiration. Which assessment fits?

Water stress turns the canopy into a source of direct sunlightThe shaded waiting area loses its cover when evaporation slowsCanopy interception still reduces direct radiation reaching peopleDry roots accelerate the release of water vapor from leaves

Question 6A brightly painted wall has lower surface absorption and faces a busy footpath. What side effect needs checking?

The bright finish stopping ventilation along the footpathReflected sunlight reaching pedestrians beside the wallReflected sunlight cooling the surfaces that absorb itA fall in wall absorption requiring a fall in nearby glare

Question 7Planners compare narrow streets with broad open spaces. Which process explains why building geometry matters after dark?

A taller skyline creates incoming solar energy after sunsetClose walls increase the amount of sky visible from the groundStreet orientation sets the thermal properties of the wall materialRestricted sky exposure alters the escape of long-wave radiation

Question 8Two workers share an air-temperature reading but differ in workload and access to shade. Which conclusion should inform a risk assessment?

The work done and shelter from radiant heat affect strainJob title and district temperature specify the protection availableEqual readings and adjacent worksites imply matching heat strainWork duration and shade change comfort but leave heat strain unchanged

Question 9An air conditioner cools rooms in a building. What happens at its outdoor condenser?

Electrical consumption returns as cool air to the streetHeat from the rooms is destroyed during compressionRemoved indoor heat and energy used by the system enter the surroundingsThe released energy is less than the heat removed indoors

Question 10A town proposes a recirculating fountain during a prolonged shortage of water. Which statement should inform the decision?

Evaporation cools the surroundings while consuming available waterThe pump’s electrical rating gives the heat removed from nearby airHigher humidity speeds evaporation and strengthens coolingRecirculating the flow recovers the water lost as vapor

Answer every question to see and share your score.

Urban Heat Islands Quiz

How does it work?

What will you get?