Which material most likely gets the warmest when placed in the Sun?

Which material most likely gets the warmest when placed in the Sun?

• A. White cement
• B. Beige sand
• C. Brown mulch
• D. Yellow pebbles

Answer: (C)

How warm a material gets in sunlight mainly depends on how much of the sun’s energy it absorbs. Darker colors absorb more solar energy (lower reflectivity), while lighter colors reflect more and stay cooler. White cement reflects a lot of sunlight, so it stays relatively cool. Beige sand reflects more than brown mulch but less than white. Yellow pebbles are lighter and reflect more than brown mulch, so they don’t get as hot as the dark material. Brown mulch, being dark, absorbs the most solar energy and converts more of it into heat at the surface, making it the warmest.

How warm a material gets in sunlight mainly depends on how much of the sun’s energy it absorbs. Darker colors absorb more solar energy (lower reflectivity), while lighter colors reflect more and stay cooler. White cement reflects a lot of sunlight, so it stays relatively cool. Beige sand reflects more than brown mulch but less than white. Yellow pebbles are lighter and reflect more than brown mulch, so they don’t get as hot as the dark material. Brown mulch, being dark, absorbs the most solar energy and converts more of it into heat at the surface, making it the warmest.