1. How did the sunlight affect the color of the paper?
2. How can you explain the handprint that is left on the paper after being out in the sun for hours?
Closure: How can we protect our skin from harmful UV rays?
2. How can you explain the handprint that is left on the paper after being out in the sun for hours?
Closure: How can we protect our skin from harmful UV rays?
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Answer:
a.Ultraviolet light from the sun can fade the colors of paper and fabric. The chemicals in colored dyes can break down in the presence of ultraviolet light waves.
b.Two types, UVA and UVB, can damage skin. Sunscreen works by combining organic and inorganic active ingredients to protect skin from these harmful UV rays emitted by the sun. ...
—When we applied sunscreen to the paper, the chemicals in the sunscreen absorbed the UV radiation and prevented them from bleaching the paper.
Closure answer:
•To protect yourself from UV radiation:
•Stay in the shade, especially during midday hours.
•Wear clothes that cover your arms and legs.
Wear clothes that cover your arms and legs.Consider options to protect your children.
•Wear a wide brim hat to shade your face, head, ears, and neck.
•Wear wraparound sunglasses that block both UVA and UVB rays.
•Use sunscreen with sun protection factor (SPF) 15 or higher, for both UVA and UVB protection.
•Avoid indoor tanning. Indoor tanning is particularly dangerous for younger users; people who begin indoor tanning during adolescence or early adulthood have a higher risk of developing melanoma.
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