How does sunscreen work?(1 point)
Responses
It helps prevent the skin from reflecting UV waves.
It helps prevent the skin from reflecting UV waves.
It helps UV waves be able to pass through the air.
It helps UV waves be able to pass through the air.
It helps UV waves be able to pass through the skin.
It helps UV waves be able to pass through the skin.
It helps prevent the skin from absorbing UV waves.
It helps prevent the skin from absorbing UV waves.
Correct answer: It helps prevent the skin from absorbing UV waves.
Explanation: Sunscreen works by forming a protective barrier on the skin that helps to absorb or scatter UV (ultraviolet) radiation. It contains ingredients like organic or inorganic compounds that interact with UV rays and either absorb them or reflect them away from the skin. By doing so, sunscreen helps to reduce the amount of UV radiation that reaches the skin and therefore helps to prevent sunburn, skin damage, and the risk of skin cancer.
The correct answer is: It helps prevent the skin from absorbing UV waves.
Sunscreen works by creating a protective layer on the skin that acts as a barrier between the skin and the harmful ultraviolet (UV) rays from the sun. Sunscreens contain active ingredients that either absorb or reflect UV radiation.
Chemical sunscreens have ingredients like oxybenzone or avobenzone that absorb UV rays and convert them into heat energy, which is then released from the skin. These ingredients work by absorbing both UVA and UVB rays.
Physical sunscreens, on the other hand, have ingredients like zinc oxide or titanium dioxide that sit on top of the skin and act as a physical barrier. They reflect and scatter both UVA and UVB rays away from the skin, preventing them from being absorbed.
To use sunscreen effectively, apply it generously to all exposed skin and reapply every two hours or more frequently if swimming or sweating. It is important to choose a broad-spectrum sunscreen that protects against both UVA and UVB rays and has a sun protection factor (SPF) of 30 or higher.