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)
• Unlike asphalt, soil contains carbon dioxide.
• The garden and plants have more mass than the asphalt.
• Plants release water vapor whereas asphalt does not.
• Soil is natural and asphalt is man-made.
• A garden insulates the building from heat better than asphalt.
• The gardens and plants have a higher albedo than asphalt.
The three correct answers are:
1. Plants release water vapor whereas asphalt does not. This process helps to cool the surrounding air and reduce heat absorption.
2. A garden insulates the building from heat better than asphalt. The soil and plant cover on the rooftop provide an additional layer of insulation, reducing the amount of heat that is transferred to the building.
3. The gardens and plants have a higher albedo than asphalt. Albedo refers to the ability of a surface to reflect sunlight. Rooftop gardens with plants and soil have a higher albedo compared to asphalt, meaning they reflect more sunlight and absorb less heat.