Stratospheric Ozone Depletion

Which statement regarding the decreased level of stratospheric ozone is correct?

• Increased photosynthetic activity has been measured in the phytoplankton around Antarctica

• The largest decrease in the level of stratospheric ozone over the Arctic region occurs between January and April

• Although the Montreal Protocol led to a reduction in the use of CFCs, it will have little effect on stratospheric ozone levels in the long term

• There is no correlation between the incidence of cataracts and skin cancers and the lower level so stratospheric ozone

• The global crop yields of wheat, rice, and corn have increased since the reduction in CFC use

Tags

NGSS.HS-ESS3-6

Location of the large whole in the ozone.

• Antarctica

• Artic

• Iceland

• Africa

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

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

Which of these sets of three items produce CFCs

• cars, factories, and cardboard

• spray cans, cardboard, insulation

• spray cans, refrigerant, cardboard

• spray cans, refrigerant, insulation

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

Through international cooperation, the concentration of chlorine in the atmosphere

• has already decreased below 3ppb

• will stabilize around 3ppb by 2030

• has stabilized at 5ppb

• is expected to stabilize at 5ppb by 2100

When is the ozone hole largest?

• early Antarctic spring

• late Antarctic summer

• early Antarctic winter

• late Antarctic fall

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 protective layer of "good" ozone is found in which layer of the atmosphere?

• Troposphere

• Stratosphere

• Thermosphere

• Mesosphere