The black road surface will absorb sunlight and so heat up more than a lighter coloured surface. Lighter coloured surfaces will reflect heat away.
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Tar roads get hotter than soil during the day because tar, being a dark material, absorbs more sunlight and heat compared to the lighter-colored soil. This absorption of solar radiation causes the tar roads to heat up faster and reach higher temperatures than the surrounding soil.
Sand heats up faster than soil because it has a lower heat capacity and thermal conductivity. This means that sand can absorb and retain heat more quickly than soil when exposed to sunlight.
Cities are hotter than rural areas because of the urban heat island effect, which is caused by factors such as buildings, roads, and human activities that absorb and retain heat, leading to higher temperatures in cities compared to surrounding rural areas.
20°C is hotter than 20°F. 20°C is equivalent to 68°F.
Sand tends to get hotter than dirt when exposed to direct sunlight due to its lower specific heat capacity, which means it heats up quicker. Sand also has lower thermal conductivity, meaning it retains heat for longer periods compared to dirt. This is why sand at the beach can feel much hotter on a sunny day than the soil in your garden.
20 degrees Celsius is hotter than 10 degrees Celsius.