Unit 1 (Intro to Environmental Science)

In the atmosphere, the most common state for Oxygen is O2.

True

Ultraviolet light has enough energy to dissolve the O2 covalent bond to create monatomic Oxygen.

True

Ozone is heavier than air, so it is forced up to the top of the atmosphere by air pressure.

False. but Ozone is heavier than air

Due to annual variations in the migration of the earth's atmosphere, the ozone layer thins significantly every year from August to October in a region of the earth.

True

In the 1980's, the atmospheric scientists identified less dense regions of ozone in the stratosphere above the ________ region.

Above the antarctic region

Much of the UV radiation received from the sun is absorbed in the upper atmosphere by various gases, and can split O2 molecules which can eventually result in the creation of _____ molecules.

the creation of ozone molecules

The molecule with atomic structure O is called a ____ gas.

a monatomic gas

Ozone is less dense than air so the ozone rises to the top of the atmosphere.

False. Ozone is denser than air

As the earth loses the concentration of O3 molecules in the ____ layer, the incidence of skin cancers in humans has increased.

the ozone layer

Chlorofluorocarbons, CFC's, are synthetic compounds made from:
A. fluorine
B. carbon
C. hydrogen
D. oxygen
E. chlorine

A. fluorine
B. carbon
E. chlorine

The molecule with atomic structure O3 is called a ____ gas.

a triatomic gas

Two qualities of CFC that stimulated their use in industry were:

A. CFCs are chemically very stable and remain this molecule a long time.
B. CFCs are relatively inert., that is, they do not chemically combine easily with other compounds.
C. Since CFCs have a lot of hydrogen the gas is less dense and is easy to carry and store.
D. All CFCs can be easily transformed into other compounds.

A. CFCs are chemically very stable and remain this molecule a long time
B. CFCs are relatively inert, that is, they do not chemically combine easily with other compounds.

Dr. Paul Crutzen, in the 1960's and 70's, predicted that some man-made gases were thinning out the earth's atmosphere. These thinning regions of the stratosphere were given the name "____ holes."

ozone holes

Scientist predict it will take until ____ for the ozone layer to recover significantly.

until 2066

The molecule with atomic structure O2 is a ____gas.

a diatomic gas

There are several types of CFC molecules.

True