The world in UV-Understanding UV Light and Its Effects

What is the primary reason tonic water appears bright under ultraviolet light?

• It absorbs visible light only.

• It is naturally luminescent.

• It is transparent to UV light.

• It contains quinine which fluoresces under UV light.

Why do UV cameras show the world as hazy?

• UV cameras are typically low quality.

• Due to the absorption by atmospheric gases.

• Because of high pollution levels.

• Due to Rayleigh scattering.

What is the role of melanin in the skin when exposed to UV rays?

• It reflects all UV light.

• It makes the skin transparent to UV light.

• It has no role in UV protection.

• It protects DNA by absorbing UV light.

Tags

NGSS.MS-LS3-1

Why do flowers have pigments that are visible under UV light?

• To attract bees and other insects that can see UV light.

• To repel predators.

• To perform photosynthesis.

• To reduce water loss.

What does a UV pass filter do?

• Converts UV light into visible light.

• Absorbs visible light and allows UV to pass through.

• Blocks all light.

• Only allows visible light to pass through.

Tags

NGSS.HS-PS4-5

How does sunscreen protect the skin from UV rays?

• By absorbing UV light and converting it into heat.

• By reflecting all sunlight.

• By making the skin thicker.

• By cooling the skin.

Tags

NGSS.MS-PS4-2

What phenomenon explains why the sky looks blue?

• Reflection of ocean water.

• Absorption of blue light by the atmosphere.

• Rayleigh scattering.

• Emission of blue light by the sun.

Why might harp seal pups be difficult to spot in aerial surveys using visible light?

• They are usually hidden under the snow.

• Their fur blends into the snow and ice.

• They are too small to be seen.

• Their fur is transparent.

What is the main reason tonic water looks dark in UV light outdoors?

• It emits UV light.

• It is transparent to UV light.

• It reflects all UV light.

• It absorbs UV light.

Tags

NGSS.MS-PS4-2

What is the effect of ultraviolet light on the quinine molecule?

• It breaks down the molecule.

• It makes the molecule invisible.

• It causes the molecule to fluoresce.

• It has no effect on the molecule.

Tags

NGSS.HS-PS4-3