Knowledge quiz · 12 questions
Quiz: SPF and sun protection
A 12-question SPF quiz: UVA vs UVB, what SPF 30 means, how much to apply, mineral filters, the nano label and PA++++. Score over 85% and you get fireworks.
1/12 The SPF number mainly measures protection against which rays?Infrared Blue light UVB UVA
2/12 UVA rays are mostly linked to…Only sunburn Nothing, they're harmless Vitamin D production Skin ageing and pigmentation
3/12 Roughly how much UVB does SPF 30 block?100% About 50% About 75% About 97%
4/12 How often should you reapply SPF in the sun?Only when skin turns red About every 2 hours and after swimming Once in the morning is enough Every 6 hours
5/12 How much SPF do you need for face and neck according to the two-finger rule?Two full finger-lengths Whatever fits on a fingertip Half a teaspoon for the whole body A pea-sized drop
6/12 Which two are mineral UV filters?Zinc oxide and titanium dioxide Niacinamide and panthenol Glycerin and squalane Avobenzone and octocrylene
7/12 Which rays pass through window glass?Neither UVB Only infrared UVA
8/12 What does PA++++ on Asian sunscreens mean?That it's for children The level of UVA protection The level of UVB protection Water resistance
9/12 What does UVA in a circle mean on a European sunscreen?It only protects against UVA It's a mineral sunscreen UVA protection is at least a third of the SPF It's fragrance-free
10/12 What does (nano) mean on an EU ingredient list?The ingredient is dermatologically tested The ingredient is in nanoparticle form The ingredient is natural The ingredient is present in a tiny amount
11/12 What does broad spectrum mean on an SPF?It protects against both UVA and UVB It suits all skin types It comes in several shades It's water-resistant
12/12 Do you need SPF on a cloudy day?Only in summer No, clouds block all UV Yes, a large share of UV gets through clouds Only above 25 °C