IB ESS Topic 8

The breakdown of stratospheric ozone; Can originate from the emission of chlorofluorocarbons (CFCs). Is catalyzed through a free chlorine (Cl) atom. Prevents all UV rays from reaching the earth’s surface.

• I only

• III only

• I,&II

• I,II,& III

Tags

NGSS.HS-PS1-5

NGSS.HS-ESS2-2

NGSS.HS-ESS2-4

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.MS-PS1-2

Location of the large whole in the ozone.

• Antarctica

• Artic

• Iceland

• Africa

Tags

NGSS.HS-ESS3-5

Which is true about ozone formation and destruction? select all that apply

• Its formation and destruction is an example of a dynamic process in nature.

• It forms when a free oxygen atom reacts with a molecule of oxygen.

• UV radiation breaks up ozone by splitting off an oxygen atom.

• Ozone cannot reform once it absorbs UV radiation.

Tags

NGSS.HS-PS4-4

NGSS.HS-PS4-3

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Layer of reactive gas at 20-30km above the Earth (15-20km at the poles) absorbing UV radiation

• Greenhouse Gases

• Troposphere

• Stratosphere

• Ozone Layer

Which agreement allowed for a reduction, and eventual elimination, of CFC production and use?

• Montreal Protoccol

• Kyoto Protoccol

• Paris Agreement

• Minamata convention

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.

Tags

NGSS.HS-PS1-5

NGSS.HS-ESS3-4

Which is NOT a result of the reduction in stratospheric ozone?

• reduced photosynthetic activity

• increased skin cancer

• increased likelihood of cataracts

• increased birth defects

Which is not an example of an ecological consequence of reduced stratospheric ozone?

• loss of biodiversity from reduced photosynthesis in plants

• collapse of marine food webs

• increased crop yield

• reduced terrestrial biome productivity

Tags

NGSS.HS-LS2-5

NGSS.HS-LS4-5