Identify three processes in which a rooftop garden can reduce the heat absorbed, compared to an asphalt roof. Select the three correct answers. (2 points)
The gardens and plants have a higher albedo than asphalt
The garden and plants have more mass than the asphalt.
Soil is natural and asphalt is man-made.
Plants release water vapor wereas asphalt does not.
Unlike asphalt soil contains carbon dioxide
A garden insulates the building from heat better than asphalt.
The three correct answers are:
1. The gardens and plants have a higher albedo than asphalt. Albedo refers to the ability of a surface to reflect sunlight. Rooftop gardens with vegetation generally have a higher albedo than asphalt, meaning they reflect more sunlight and absorb less heat.
2. Plants release water vapor whereas asphalt does not. Through the process of transpiration, plants release water vapor into the atmosphere. This evapotranspiration helps cool the surrounding area and reduces the amount of heat absorbed by the rooftop garden compared to an asphalt roof.
3. A garden insulates the building from heat better than asphalt. The layer of soil and vegetation in a rooftop garden acts as a natural insulator, reducing heat transfer into the building below. This insulation helps to keep the building cooler and reduces the amount of heat absorbed by the rooftop garden compared to an asphalt roof.