ozone depletion

Question 1

, is vital for life and absorbs harmful ultraviolet (UV) rays emitted from the sun.

Answer 1

stratospheric ozone layer

Question 2

stratospheric ozone layer, which lies at the height of __to___ kilometers above the
Earth,

Answer 2

10 to 50

Question 3

This
protective layer has been extremely affected by human activities, especially the release of
ozone-depleting substances (ODS)

Answer 3

stratospheric ozone layer

Question 4

These include chlorofluorocarbons (CFCs), halons, and
other long-lived chemical compounds.

Answer 4

ozone-depleting substances (ODS)

Question 5

The most dramatically evident consequence of this process is the “__________,” a
seasonal depletion of ozone that recurs over Antarctica

Answer 5

ozone hole

Question 6

enhance
chemical reactions that amplify ozone destruction during the springtime return of sunlight.

Answer 6

Polar stratospheric clouds

Question 7

Higher instances of exposure to ____cause skin cancer, cataract formation, and
weakening of the immune system.

Answer 7

UV

Question 7

an international agreement that provides for the
protection of the ozone layer by phasing out the use of ODS, specifically
chlorofluorocarbons and halons.

Answer 7

1987
Montreal Protocol,

Question 8

is a layer of gaseous ozone in the stratosphere that keeps about 95% of the
sun’s harmful ultraviolet (UV) radiation from reaching the earth’s surface.

Answer 8

Ozone layer

Question 9

is the chemical formula for ozone, a molecule made out of three oxygen atoms.

Answer 9

O3

Question 10

The wearing out
(reduction) of the
amount of ozone in
the stratosphere

Answer 10

OZONE DEPLETION

Question 11

used as
coolants, propellants, cleaners for
electronic parts, fumiginants, and
bubbles in plastic foam

Answer 11

Chlorofluorocarbons

Question 12

used in
fire extinguisher

Answer 12

Halons and
Hydrobromofluorocarbons -

Question 13

used as fumigant

Answer 13

Methyl bromide

Question 14

emitted into the
stratosphere by space shuttles

Answer 14

Hydrogen Chloride

Question 15

effects of ozone depletion in food and forest

Answer 15

Reduced yields for some crops.

Reduced seafood supplies from reduced
phytoplankton.

Decreased forest productivity for UVsensitive tree species.

Question 16

This is the outermost layer, where particles in the atmosphere are very
sparsely populated and may even escape into space. This section runs from about 600
km above Earth’s surface to about 10,000 km.

Answer 16

Exosphere -

Question 17

This layer reaches from 80 km up to 600 km, with temperatures
extremely hot due to solar radiation. It’s also where the auroras occur and contains the
ionosphere; that part is essential for radio communication.

Answer 17

Thermosphere

Question 18

From 50 to 80 km altitude, it is Earth’s coldest atmospheric layer. The
majority of meteors burn up upon entering Earth’s atmosphere during this zone.

Answer 18

Mesosphere

Question 19

From approximately 10 km to 50 km altitude, is the stratosphere, which
holds the ozone layer that absorbs and scatters ultraviolet solar radiation in a way that
protects life on Earth.

Answer 19

o Stratosphere -

Question 20

This is the lowest layer reaching from the surface up to approximately
10 km height. It contains a great portion of earth’s weather, clouds, and water vapor.
Temperature decreases with altitude in this layer.

Answer 20

Troposphere

Question 21

natural causes of ozone

Answer 21

volcanic activity
solar activity
lightning and storms
cosmic rays

Question 22

can release large quantities of chlorine and
bromine compounds through the stratosphere

Answer 22

Volcanic Activity

Question 23

also produce nitrogen
oxides NOx that react with ozone molecules

Answer 23

Lightning and Storms

Question 24

Effects of Ozone Depletion
1) Human Health

Answer 24

a) More skin cancers, sunburns and premature aging of the skin.
b) More cataracts, blindness and other eye diseases.
c) Immune system suppression

Question 25

Expected Effects of Ozone Depletion
Food and Forests

Answer 25

a) Reduced yields for some crops
b) Reduced seafood supplies form reduced phytoplankton
c) Decreased forest productivity for UV-sensitive tree species

Question 26

Expected Effects of Ozone Depletion

Answer 26

a) Increased eye cataracts in some species
b) Decreased population of aquatic species sensitive to UV radiation
c) Reduced population of surface phytoplankton
d) Disrupted aquatic food webs from reduced phytoplankton

Question 27

Expected Effects of Ozone Depletion

Answer 27

a) Increased acid deposition
b) Increased photochemical smog
c) Degradation of outdoor paints and plastics

Question 28

Expected Effects of Ozone Depletion

Answer 28

a) Accelerated warming because of decreased ocean uptake of CO2 from
atmosphere by phytoplankton and CFCs acting as greenhouse gasses

Question 29

Measures to Prevent the Ozone Depletion

Answer 29

1) Limit private vehicle driving
2) Use eco-friendly household cleaning products
3) Avoid using pesticides
4) Developing stringent regulations for rocket launches
5) Banning the use of dangerous nitrous oxide