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Type
science_lab
Pre Lab
Background: Have you ever noticed that cities feel much hotter than the surrounding countryside, especially in summer? This phenomenon is called the **urban heat island effect**. Cities are filled with surfaces like asphalt roads, concrete sidewalks, and rooftops that absorb large amounts of solar energy during the day and release it slowly as heat. In contrast, natural surfaces like grass, soil, and water bodies reflect more sunlight and use energy for processes like evaporation, keeping temperatures cooler.
The difference in temperature between urban and rural areas can be as much as 5–10°C (9–18°F). This extra heat affects human health, increases energy use for air conditioning, and can even change local weather patterns. Scientists study **heat absorption** — how much energy a surface takes in — and **heat retention** — how long a surface holds onto that energy — to understand why some materials heat up faster and stay hot longer than others. The **albedo** of a surface, or how much light it reflects, plays a major role: dark surfaces like asphalt have low albedo and absorb more energy, while lighter or vegetated surfaces have higher albedo and absorb less.
In this open inquiry lab, you will act as environmental scientists designing your own investigation to explore how different surface materials compare in their ability to absorb heat. Your findings will help explain why neighborhoods with more pavement and fewer trees tend to be significantly hotter than greener areas nearby.
Vocabulary
Term: Urban Heat Island Effect
Definition: The phenomenon where urban areas experience significantly higher temperatures than surrounding rural areas due to human activities and built surfaces.
Term: Heat Absorption
Lab Type
Post Lab
Standards
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Teacher Notes
Estimated Time
Experiment Design
Research Question
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