Question

your team must design an area in your school where students can relax between classes. you need to choose a material for a walkway. the materials you need to consider are in the table.

material	albedo (%)
red bricks	36
concrete	15–25
soil	10–25

which material should you use so that the area is cool in terms of temperature?

• asphalt
• red bricks
• concrete
• soil

Explanation:

Albedo is the proportion of solar energy reflected by a surface. A higher albedo means more energy is reflected, so the surface absorbs less heat and stays cooler. Among the materials: asphalt (5 - 10% albedo), red bricks (36% albedo), concrete (15 - 25% albedo), soil (10 - 25% albedo). Red bricks have the highest albedo, so they reflect the most solar energy, resulting in a cooler temperature for the walkway.

Answer:

red bricks