The Sun and UV

Which term best describes ultraviolet radiation?

• harmless
• invisible
• undetectable
• beneficial

Tags

NGSS.HS-PS4-4

How are UVC rays different from UVA and UVB rays?

• UVC penetrates all layers of skin; UVA and UVB don't
• UVC are deflected by Earth's atmosphere; UVA and UVB aren't
• UVC contain little energy; UVA and UVB are very powerful
• Sunblock protects against UVC, but not UVA and UVB

What might happen if your skin lacked melanocytes?

• you couldn't get skin cancer
• you couldn't get sunburned
• you'd be extremely pale
• your skin would be hairless

What is the main function of melanin?

• protect against radiation
• protect against sunburn
• protect eyes against bright light
• prevent UV rays from striking epidermis

_____ exposure to UV rays often leads to skin cancer.

• Nocturnal
• Indirect
• Brief
• Prolonged

What is the difference between SPF 10 and SPF 45 sunscreen?

• 45 absorbs UV radiation; 10 reflects it
• 45 blocks UV and visible light rays; 10 only blocks UV rays
• 45 blocks UVA and UVB rays; 10 doesn't
• 45 protects you for a longer time than 10

You're heading to the beach at 11 in the morning. What's the latest time your should apply sunscreen?

• 9:30
• 10:30
• 11:00
• 11:30

At which time are the sun's rays most powerful?

• 8:15 am
• 9:45 am
• 3:45 pm
• 4:30 pm

Tags

NGSS.MS-ESS1-1

When shopping for sunglasses, you should make sure the ones you buy offer:

• really dark lenses
• UV protection
• high SPF factor
• metal, not plastic, frames

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Which hat is best to wear outside on a hot, sunny day?

• baseball cap
• ski cap
• small brimmed hat
• wide brimmed hat