UV Light and the Ozone

Second layer of the atmosphere, extending about 17-48 kilometers above the earth’s surface. It contains a layer of gaseous ozone, which filters out about 95% of the incoming harmful ultraviolet radiation emitted by the sun

• Mesosphere

• Troposphere

• Stratosphere

• Ozone

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Layer of gaseous ozone in the stratosphere that protects life on earth by filtering out most harmful ultraviolet radiation from the sun

• Greenhouse Gases

• Troposphere

• Stratosphere

• Ozone Layer

How do CFCs affect ozone production?

• UV radiation frees a chlorine atom, which breaks down ozone.

• Infrared radiation frees a chlorine atom, which breaks down ozone.

• UV radiation frees a fluorine atom, which breaks down ozone.

• Infrared radiation frees a chlorine atom, which breaks down ozone.

Tags

NGSS.HS-PS1-2

Depletion of ozone layer is a concern because it normally absorbs ____% of the sun's UV radiation. 

• 50

• 75

• 89

• 99

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

The formation of ozone begins when an O₂ molecule is split by

• UV-A radiation

• UV-B radiation

• UV-C radiation

• UV-A or UV-B radiation

• UV-B or UV-C radiation

When oxygen gas in the lower stratosphere is struck by this, it splits, leading to the formation of a ozone molecule.

• visible light

• ultraviolet radiation

• infrared

• gamma rays

Tags

NGSS.HS-PS4-3

The formation of ozone begins when and O2 molecule is split by

• UV-A radiation

• UV-B radiation

• UV-C radiation

• UV-A or UV-B radiation

Tags

NGSS.HS-PS4-3

Which is most strongly absorbed by ozone in the statosphere?

• UV-A

• UV-B

• UV-C

• UV-B and UV-C

• UV-A and UV-B

Tags

NGSS.HS-PS4-4

The breakdown of stratospheric ozone
I. can originate from the emission of chlorofluorocarbons (CFCs).
II. is catalyzed through a free chlorine (Cl) atom.
III. prevents UV rays from reaching the earth’s surface.

• I only

• III only

• I,&II

• I,II,& III

Tags

NGSS.HS-PS4-3

Though CFC production has been curtailed, the threat to upper atmosphericozone continues because CFCs

• become harmless quickly.

• destroy ozone for only a short time.

• persist but stop destroying ozone.

• persist and continue to destroy ozone for decades.