TEXES Science of Teaching Reading Practice Test

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What component is indicated by an SPF rating greater than 15 in sunscreen products?

Duration of effectiveness
How well it protects against UVA and UVB rays
Texture and feel upon application
Important ingredients used in formulation

The correct answer is: How well it protects against UVA and UVB rays

An SPF rating greater than 15 in sunscreen products indicates the level of protection offered against UVB rays, which are primarily responsible for sunburn and contribute to skin cancer. SPF, or Sun Protection Factor, specifically measures how long a sunscreen will protect your skin from sunburn compared to not wearing any sunscreen at all. A higher SPF means that it provides enhanced protection against UVB rays, allowing individuals to spend more time in the sun without burning. While some sunscreens may also have broad-spectrum protection that guards against both UVA and UVB rays, the SPF number itself focuses on UVB protection. This means that a higher SPF number goes hand-in-hand with increased effectiveness in preventing sunburn, but it does not inherently provide information about the product's texture, feel, or specific ingredients. These aspects are related to other components that do not correlate directly with the SPF rating itself.